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Drivetrain & Sports Gearbox Parts


Optimize Your Drivetrain: More Power, More Pleasure

At Optimiz Access, we offer custom-tailored solutions for a more efficient, direct, and responsive drivetrain. Whether you are aiming to put power down on the track or achieve sharper gear selection in daily driving, upgrading your transmission system unlocks the full potential of your sports vehicle.

Key benefits of an optimized drivetrain: faster and more precise gear shifts for dynamic driving, improved torque distribution for maximum traction, enhanced component reliability, and custom setups suited to all driving styles.

Essential Components for Gearboxes and Differentials

Our lineup brings together all the essential precision parts needed to maximize power transfer to the road:

  • Clutches & Flywheels – Reinforced clutch kits, single-mass race flywheels, and high-friction materials built to handle high torque output.
  • LSDs & Differentials – Limited-slip differentials designed to eliminate wheelspin and maximize exit traction.
  • Shifters & Short Shifters – Precision short-throw shifters delivering crisp, rapid gear engagements.
  • Final Drive Gears – Shorter ring and pinion gear sets providing explosive acceleration and mid-range response.
  • Gearbox Oils & Bearings – High-performance synthetic gear oils and heavy-duty bearings engineered to protect gears under load.

Benchmark Brands and Trusted Partners

We work with the most respected motorsport manufacturers in the industry: CAE Racing, Sadev, Quaife, 4Tech Shifter, Helix, SACHS Performance, and TTV Racing. We also stock OEM factory parts to cover all your routine maintenance, servicing, and drivetrain overhauls.

Why Choose Optimiz Access for Your Drivetrain?

Since 2010, Optimiz Access has specialized in the custom upgrading and maintenance of sports and premium vehicles. By relying on us, you gain expert technical advice, high-precision components, and professional installation in our workshop in northern France (Hauts-de-France) — near Lille, Valenciennes, Cambrai, Arras, Seclin, Douai, and Saint-Quentin. We ensure strict quality control along with fast worldwide shipping.

Gear Up and Boost Your Sports Car's Traction Today

Don't let your engine's power go to waste. Trust the expertise of Optimiz Access, select your transmission hardware today, and take advantage of our fast dispatch to get your vehicle build underway.

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  • Categories: Bearings
  • Categories: Drive Shafts
Entraineur de cardan droit Clio Gr N Phase 1SADEV Right Drive Flange F1903162 - Clio 2 Gr N Phase 1 ST66 Gearbox
      The SADEV Right Drive Flange (F1903162) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the right driveshaft. A specific and essential component for the Renault Clio 2 Group N Phase 1 . A...
      €934.62Price
      Entraineur de cardan droit Clio Gr N Phase 1SADEV Right Drive Flange F1903162 - Clio 2 Gr N Phase 1 ST66 Gearbox
          The SADEV Right Drive Flange (F1903162) is the original SADEV part that ensures the final transmission of engine torque from your SADEV ST66 gearbox to the right driveshaft. A specific and essential component for the Renault Clio 2 Group N Phase 1 . A...
          €934.62Price
          En Stock
          €1,145.76 Price
          En Stock
          €1,145.76 Price
          Left Evo reinforced driveshaft CV axle Renault Sport Megane N4 SADEV ref 7711167653
              Don't risk driveshaft failure or loss of traction during a rally stage or track day. The genuine Renault Sport / SADEV left evolved (Evo) driveshaft (Reference: 7711167653) is specifically engineered to handle high torque output and extreme mechanical stress on the...
              €1,145.76Price
              Left Evo reinforced driveshaft CV axle Renault Sport Megane N4 SADEV ref 7711167653
                  Don't risk driveshaft failure or loss of traction during a rally stage or track day. The genuine Renault Sport / SADEV left evolved (Evo) driveshaft (Reference: 7711167653) is specifically engineered to handle high torque output and extreme mechanical stress on the...
                  €1,145.76Price
                  En Stock
                  €248.51 Price
                  En Stock
                  €248.51 Price
                  Genuine Renault Sport Clio 3 X85 Cup front race wheel bowl part 7711160118 F1908361.
                      Do not risk imprecise steering, severe track vibrations, or drivetrain failure on your running gear. The genuine wheel bowl for Renault Clio 3 X85 Cup (OEM references 7711160118 and F1908361 ) is the fundamental link component of the...
                      €248.51Price
                      Genuine Renault Sport Clio 3 X85 Cup front race wheel bowl part 7711160118 F1908361.
                          Do not risk imprecise steering, severe track vibrations, or drivetrain failure on your running gear. The genuine wheel bowl for Renault Clio 3 X85 Cup (OEM references 7711160118 and F1908361 ) is the fundamental link component of the...
                          €248.51Price
                          En Stock
                          €102.54 Price
                          En Stock
                          €102.54 Price
                          Kit soufflet de palier de Cardan Clio 2 RS
                              Kit soufflet de palier de Cardan Clio 2 RS Attention, plusieurs modeles existent, merci de verifier la compatibilité avec votre cardan
                              €102.54Price
                              Kit soufflet de palier de Cardan Clio 2 RS
                                  Kit soufflet de palier de Cardan Clio 2 RS Attention, plusieurs modeles existent, merci de verifier la compatibilité avec votre cardan
                                  €102.54Price
                                  En Stock
                                  €1,901.64 Price
                                  En Stock
                                  €1,901.64 Price
                                  Transmission gauche assemblée Clio R3 MaxiRenault Sport Left Drive Shaft for Clio R3 Max
                                      Do not let a mechanical failure compromise your next rally. This assembled left-hand drive shaft is an official Renault Sport component (reference 7711168126 ), specifically developed for the Renault Clio R3 Max . Engineered to withstand the extreme constraints of a competition-grade F4R engine, this left CV...
                                      €1,901.64Price
                                      Transmission gauche assemblée Clio R3 MaxiRenault Sport Left Drive Shaft for Clio R3 Max
                                          Do not let a mechanical failure compromise your next rally. This assembled left-hand drive shaft is an official Renault Sport component (reference 7711168126 ), specifically developed for the Renault Clio R3 Max . Engineered to withstand the extreme constraints of a competition-grade F4R engine, this left CV...
                                          €1,901.64Price
                                          En Stock
                                          €1,594.54 Price
                                          En Stock
                                          €1,594.54 Price
                                          Transmission droite assemblée Clio R3 MaxiRenault Sport Right Drive Shaft for Clio R3 Max
                                              Maintain the traction and balance of your front axle with this complete right-hand drive shaft , an original Renault Sport component (reference 7711168127 ). Specifically calibrated for the high-stress environment of the Renault Clio R3 Max , this CV axle ensures absolute reliability during full-throttle gear changes. Do not...
                                              €1,594.54Price
                                              Transmission droite assemblée Clio R3 MaxiRenault Sport Right Drive Shaft for Clio R3 Max
                                                  Maintain the traction and balance of your front axle with this complete right-hand drive shaft , an original Renault Sport component (reference 7711168127 ). Specifically calibrated for the high-stress environment of the Renault Clio R3 Max , this CV axle ensures absolute reliability during full-throttle gear changes. Do not...
                                                  €1,594.54Price
                                                  Collection soufflet de transmission gauche coté boite Clio 3 RS - Megane 2 RS
                                                      Collection soufflet de transmission gauche coté boite Clio 3 RS et Megane 2 RS Véritable produit d'origine
                                                      €108.19Price
                                                      Collection soufflet de transmission gauche coté boite Clio 3 RS - Megane 2 RS
                                                          Collection soufflet de transmission gauche coté boite Clio 3 RS et Megane 2 RS Véritable produit d'origine
                                                          €108.19Price
                                                          En Stock
                                                          €65.56 Price
                                                          En Stock
                                                          €65.56 Price
                                                          Collection soufflet Megane 3 RS coté roueCollection soufflet Megane 3 RS coté roue
                                                              Collection soufflet Megane 3 RS coté roue Véritable produit d'origine
                                                              €65.56Price
                                                              Collection soufflet Megane 3 RS coté roueCollection soufflet Megane 3 RS coté roue
                                                                  Collection soufflet Megane 3 RS coté roue Véritable produit d'origine
                                                                  €65.56Price
                                                                  Bol de Roue Clio 2 Cup et Williams Gr A
                                                                      The SADEV Wheel Housing (Hub Carrier) (references 7700108002 , 7711155366 , 1008025 ) is an essential part for ensuring the fastening and reliability of the driveshaft at the wheel end on your competition vehicle . It is used notably on the Renault Clio 2 X65 Cup equipped with the SADEV...
                                                                      €130.96Price
                                                                      Bol de Roue Clio 2 Cup et Williams Gr A
                                                                          The SADEV Wheel Housing (Hub Carrier) (references 7700108002 , 7711155366 , 1008025 ) is an essential part for ensuring the fastening and reliability of the driveshaft at the wheel end on your competition vehicle . It is used notably on the Renault Clio 2 X65 Cup equipped with the SADEV...
                                                                          €130.96Price
                                                                          Left-hand inner CV boot repair kit (gearbox side) for Renault Megane 3 RS and Megane N4 rally cars.
                                                                              Do not risk a catastrophic transmission fluid leak, sudden failure of your left-hand inner CV joint tripod, or the highly expensive replacement of a complete genuine Renault Sport driveshaft assembly. The Kit soufflet de transmission cardan gauche coté boite Megane 3 RS et...
                                                                              €85.96Price
                                                                              Left-hand inner CV boot repair kit (gearbox side) for Renault Megane 3 RS and Megane N4 rally cars.
                                                                                  Do not risk a catastrophic transmission fluid leak, sudden failure of your left-hand inner CV joint tripod, or the highly expensive replacement of a complete genuine Renault Sport driveshaft assembly. The Kit soufflet de transmission cardan gauche coté boite Megane 3 RS et...
                                                                                  €85.96Price
                                                                                  Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 2 et 3
                                                                                      Collection de soufflet de cardan gauche coté boite Clio 2 RS
                                                                                      €86.59Price
                                                                                      Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 2 et 3
                                                                                          Collection de soufflet de cardan gauche coté boite Clio 2 RS
                                                                                          €86.59Price
                                                                                          Sur commande ou en cours de réappro
                                                                                          €1.13 Price
                                                                                          Sur commande ou en cours de réappro
                                                                                          €1.13 Price
                                                                                              Do not risk a total mechanical failure of your gear stack in the middle of a race for a simple worn-out retaining ring. This official genuine Renault Sport / SADEV secondary shaft end circlip (Catalogue Reference: 7711162214 ) is the critical locking...
                                                                                              €1.13Price
                                                                                                  Do not risk a total mechanical failure of your gear stack in the middle of a race for a simple worn-out retaining ring. This official genuine Renault Sport / SADEV secondary shaft end circlip (Catalogue Reference: 7711162214 ) is the critical locking...
                                                                                                  €1.13Price
                                                                                                  Sur commande ou en cours de réappro
                                                                                                  €3.61 Price
                                                                                                  Sur commande ou en cours de réappro
                                                                                                  €3.61 Price
                                                                                                      Do not risk a totally preventable gear oil leak ruining your next rally stage or circuit session. This official genuine Renault Sport / SADEV clutch shaft end blanking plug O-ring (Catalogue Reference: 7711162188 ) is the vital sealing component required to...
                                                                                                      €3.61Price
                                                                                                          Do not risk a totally preventable gear oil leak ruining your next rally stage or circuit session. This official genuine Renault Sport / SADEV clutch shaft end blanking plug O-ring (Catalogue Reference: 7711162188 ) is the vital sealing component required to...
                                                                                                          €3.61Price
                                                                                                          Sur commande ou en cours de réappro
                                                                                                          €15.06 Price
                                                                                                          Sur commande ou en cours de réappro
                                                                                                          €15.06 Price
                                                                                                              Do not risk destroying your dog-engagement gearbox in the middle of a stage for a simple worn-out guidance component. This official genuine Renault Sport / SADEV clutch shaft end bearing (Catalogue Reference: 7711162187 ) is the masterpiece mechanical part...
                                                                                                              €15.06Price
                                                                                                                  Do not risk destroying your dog-engagement gearbox in the middle of a stage for a simple worn-out guidance component. This official genuine Renault Sport / SADEV clutch shaft end bearing (Catalogue Reference: 7711162187 ) is the masterpiece mechanical part...
                                                                                                                  €15.06Price
                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                  €1.12 Price
                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                  €1.12 Price
                                                                                                                      Do not risk an irremediable mechanical failure during gear changes in a race for a simple fatigued retaining ring. This official genuine Renault Sport / SADEV clutch shaft end SB15 circlip (Catalogue Reference: 7711162186 ) is the vital safety component...
                                                                                                                      €1.12Price
                                                                                                                          Do not risk an irremediable mechanical failure during gear changes in a race for a simple fatigued retaining ring. This official genuine Renault Sport / SADEV clutch shaft end SB15 circlip (Catalogue Reference: 7711162186 ) is the vital safety component...
                                                                                                                          €1.12Price
                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                          €2.86 Price
                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                          €2.86 Price
                                                                                                                              Do not ruin your next rally stage or circuit session due to a totally preventable transmission failure. This official genuine Renault Sport / SADEV clutch shaft snap ring (Catalogue Reference: 7711162185-0109908008 ) is the essential safety retaining ring...
                                                                                                                              €2.86Price
                                                                                                                                  Do not ruin your next rally stage or circuit session due to a totally preventable transmission failure. This official genuine Renault Sport / SADEV clutch shaft snap ring (Catalogue Reference: 7711162185-0109908008 ) is the essential safety retaining ring...
                                                                                                                                  €2.86Price
                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                  €1.67 Price
                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                  €1.67 Price
                                                                                                                                      Do not risk a catastrophic gearbox failure during a stage for a simple fatigued snap ring. This official genuine Renault Sport / SADEV 1st gear shaft lock washer circlip (Catalogue Reference: 7711162183-0100601005 ) is the ultimate safety component required...
                                                                                                                                      €1.67Price
                                                                                                                                          Do not risk a catastrophic gearbox failure during a stage for a simple fatigued snap ring. This official genuine Renault Sport / SADEV 1st gear shaft lock washer circlip (Catalogue Reference: 7711162183-0100601005 ) is the ultimate safety component required...
                                                                                                                                          €1.67Price
                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                          €79.99 Price
                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                          €79.99 Price
                                                                                                                                              Do not risk a catastrophic loosening of your gear assembly stack in the middle of a rally stage. This official genuine Renault Sport / SADEV 1st gear shaft nut (Manufacturer Part Number: 7711162181 ) is the essential safety component required to lock the...
                                                                                                                                              €79.99Price
                                                                                                                                                  Do not risk a catastrophic loosening of your gear assembly stack in the middle of a rally stage. This official genuine Renault Sport / SADEV 1st gear shaft nut (Manufacturer Part Number: 7711162181 ) is the essential safety component required to lock the...
                                                                                                                                                  €79.99Price
                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                  €73.49 Price
                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                  €73.49 Price
                                                                                                                                                      Do not risk a catastrophic loosening of your gear assembly stack in the middle of a rally stage. This official genuine Renault Sport / SADEV 1st gear shaft nut (Manufacturer Part Number: 7711162181 ) is the essential safety component required to lock the...
                                                                                                                                                      €73.49Price
                                                                                                                                                          Do not risk a catastrophic loosening of your gear assembly stack in the middle of a rally stage. This official genuine Renault Sport / SADEV 1st gear shaft nut (Manufacturer Part Number: 7711162181 ) is the essential safety component required to lock the...
                                                                                                                                                          €73.49Price
                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                          €86.88 Price
                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                          €86.88 Price
                                                                                                                                                          Roulement d'arbre secondaire NJ305 ECP Clio Gr N
                                                                                                                                                              Secondary Shaft Bearing NJ305 ECP SADEV ST66 (F1903026) Ensure the optimal performance of your SADEV ST66 gearbox with this genuine Renault Sport NJ305 ECP secondary shaft bearing. Designed for the Clio Gr N, it guarantees precise and reliable operation. Essential for maintaining your transmission's performance.
                                                                                                                                                              €86.88Price
                                                                                                                                                              Roulement d'arbre secondaire NJ305 ECP Clio Gr N
                                                                                                                                                                  Secondary Shaft Bearing NJ305 ECP SADEV ST66 (F1903026) Ensure the optimal performance of your SADEV ST66 gearbox with this genuine Renault Sport NJ305 ECP secondary shaft bearing. Designed for the Clio Gr N, it guarantees precise and reliable operation. Essential for maintaining your transmission's performance.
                                                                                                                                                                  €86.88Price
                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                  €119.15 Price
                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                  €119.15 Price
                                                                                                                                                                  Grand roulement de différentiel Clio 2 RS
                                                                                                                                                                      Grand roulement de différentiel Clio 2 RS
                                                                                                                                                                      €119.15Price
                                                                                                                                                                      Grand roulement de différentiel Clio 2 RS
                                                                                                                                                                          Grand roulement de différentiel Clio 2 RS
                                                                                                                                                                          €119.15Price
                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                          €97.60 Price
                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                          €97.60 Price
                                                                                                                                                                              Do not risk a destructive radial play or a gearbox lock-up in the middle of a stage. This official genuine Renault Sport / SADEV 1st gear roller bearing (Manufacturer Part Number: 7711156724 and SADEV internal reference:...
                                                                                                                                                                              €97.60Price
                                                                                                                                                                                  Do not risk a destructive radial play or a gearbox lock-up in the middle of a stage. This official genuine Renault Sport / SADEV 1st gear roller bearing (Manufacturer Part Number: 7711156724 and SADEV internal reference:...
                                                                                                                                                                                  €97.60Price
                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                  €110.35 Price
                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                  €110.35 Price
                                                                                                                                                                                      Do not let a simple tear immobilize your sports car or destroy your transmission. This right-hand inner driveshaft boot (gearbox side) is a genuine Renault (OEM) part , specifically designed to withstand the thermal and mechanical stresses of the Renault Clio 4 RS . Choosing manufacturer quality over aftermarket parts ensures a perfect seal...
                                                                                                                                                                                      €110.35Price
                                                                                                                                                                                          Do not let a simple tear immobilize your sports car or destroy your transmission. This right-hand inner driveshaft boot (gearbox side) is a genuine Renault (OEM) part , specifically designed to withstand the thermal and mechanical stresses of the Renault Clio 4 RS . Choosing manufacturer quality over aftermarket parts ensures a perfect seal...
                                                                                                                                                                                          €110.35Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €62.33 Price
                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                          €62.33 Price
                                                                                                                                                                                          Palier transmission droite Twingo RSPalier transmission droite Twingo RS
                                                                                                                                                                                              Palier transmission droite Twingo RS livré sans le roulement
                                                                                                                                                                                              €62.33Price
                                                                                                                                                                                              Palier transmission droite Twingo RSPalier transmission droite Twingo RS
                                                                                                                                                                                                  Palier transmission droite Twingo RS livré sans le roulement
                                                                                                                                                                                                  €62.33Price
                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                  €100.99 Price
                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                  €100.99 Price
                                                                                                                                                                                                      Soufflet de cardan gauche coté boite Clio 4 RS
                                                                                                                                                                                                      €100.99Price
                                                                                                                                                                                                          Soufflet de cardan gauche coté boite Clio 4 RS
                                                                                                                                                                                                          €100.99Price
                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                          €33.35 Price
                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                          €33.35 Price
                                                                                                                                                                                                          Roulement de differentiel Twingo RS et R1Roulement de differentiel Twingo RS et R1
                                                                                                                                                                                                              Roulement de différentiel Twingo RS et R1 Vendu à l'unité, 2 sont nécessaires
                                                                                                                                                                                                              €33.35Price
                                                                                                                                                                                                              Roulement de differentiel Twingo RS et R1Roulement de differentiel Twingo RS et R1
                                                                                                                                                                                                                  Roulement de différentiel Twingo RS et R1 Vendu à l'unité, 2 sont nécessaires
                                                                                                                                                                                                                  €33.35Price
                                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                                  €80.83 Price
                                                                                                                                                                                                                  Sur commande ou en cours de réappro
                                                                                                                                                                                                                  €80.83 Price
                                                                                                                                                                                                                  Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 1
                                                                                                                                                                                                                      Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 1
                                                                                                                                                                                                                      €80.83Price
                                                                                                                                                                                                                      Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 1
                                                                                                                                                                                                                          Collection de soufflet de cardan gauche coté boite Clio 2 RS Phase 1
                                                                                                                                                                                                                          €80.83Price
                                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                                          €136.76 Price
                                                                                                                                                                                                                          Sur commande ou en cours de réappro
                                                                                                                                                                                                                          €136.76 Price
                                                                                                                                                                                                                          Roulement de différentiel Clio R3T
                                                                                                                                                                                                                              Roulement de différentiel Clio R3T Référence: 0105001002
                                                                                                                                                                                                                              €136.76Price
                                                                                                                                                                                                                              Roulement de différentiel Clio R3T
                                                                                                                                                                                                                                  Roulement de différentiel Clio R3T Référence: 0105001002
                                                                                                                                                                                                                                  €136.76Price