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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
  • Categories: Self-Locking
copy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RScopy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
      Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
      €304.88Price
      copy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RScopy of Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
          Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
          €304.88Price
          En Stock
          €62.56 Price
          En Stock
          €62.56 Price
          SADEV Diff Lock Washer F9001096 ST75-14 Clio CupSADEV Diff Lock Washer F9001096 ST75-14 Clio Cup
              Do not sacrifice the grip and traction of your Clio 2 X65 Cup . Without this SADEV Belleville Washer Galbe 1 (Ref. F9001096 ) in perfect condition, you lose the essential preload of your SADEV limited slip differential , leading to a loss of efficiency on...
              €62.56Price
              SADEV Diff Lock Washer F9001096 ST75-14 Clio CupSADEV Diff Lock Washer F9001096 ST75-14 Clio Cup
                  Do not sacrifice the grip and traction of your Clio 2 X65 Cup . Without this SADEV Belleville Washer Galbe 1 (Ref. F9001096 ) in perfect condition, you lose the essential preload of your SADEV limited slip differential , leading to a loss of efficiency on...
                  €62.56Price
                  En Stock
                  €62.56 Price
                  En Stock
                  €62.56 Price
                  SADEV Belleville Washer F9004242 ST75-14 Clio CupSADEV Belleville Washer F9004242 ST75-14 Clio Cup
                      The precision of your ST75-14 sequential gearbox lies in the details. Without the correct SADEV Belleville Washer F=0.80 (Ref. F9004242 ), you lose the ideal functional clearance , leading to abnormal wear and threatening the reliability of your Clio 2 X65 Cup ...
                      €62.56Price
                      SADEV Belleville Washer F9004242 ST75-14 Clio CupSADEV Belleville Washer F9004242 ST75-14 Clio Cup
                          The precision of your ST75-14 sequential gearbox lies in the details. Without the correct SADEV Belleville Washer F=0.80 (Ref. F9004242 ), you lose the ideal functional clearance , leading to abnormal wear and threatening the reliability of your Clio 2 X65 Cup ...
                          €62.56Price
                          SADEV Differential Housing F1908300 - ST75 Sequential GearboxSADEV Differential Housing F1908300 - ST75 Sequential Gearbox
                              The SADEV Differential Housing (references F1908300 and 0101908300 ) is the main structure that encapsulates and protects the discs of your SADEV limited-slip differential . This genuine part is vital for the precision of the SADEV ST75 sequential gearbox equipping your Renault Clio 3 X85 Cup ....
                              €710.82Price
                              SADEV Differential Housing F1908300 - ST75 Sequential GearboxSADEV Differential Housing F1908300 - ST75 Sequential Gearbox
                                  The SADEV Differential Housing (references F1908300 and 0101908300 ) is the main structure that encapsulates and protects the discs of your SADEV limited-slip differential . This genuine part is vital for the precision of the SADEV ST75 sequential gearbox equipping your Renault Clio 3 X85 Cup ....
                                  €710.82Price
                                  Renault Assembled Differential Housing - Clio 3 RS (69 Tooth Crown)Renault Assembled Differential Housing - Clio 3 RS (69 Tooth Crown)
                                      Don't let a worn or noisy differential impact the traction and safety of your Renault Clio 3 RS . This genuine Renault assembled differential housing includes the differential, the 69-tooth crown wheel, and the crown wheel bolts, ensuring a reliable replacement that meets manufacturer specifications. You can also find the associated differential...
                                      €404.56Price
                                      Renault Assembled Differential Housing - Clio 3 RS (69 Tooth Crown)Renault Assembled Differential Housing - Clio 3 RS (69 Tooth Crown)
                                          Don't let a worn or noisy differential impact the traction and safety of your Renault Clio 3 RS . This genuine Renault assembled differential housing includes the differential, the 69-tooth crown wheel, and the crown wheel bolts, ensuring a reliable replacement that meets manufacturer specifications. You can also find the associated differential...
                                          €404.56Price
                                          Uprated front wheel hub bearing for Renault Clio 3 RS and Megane 3 / 4 RS, SKUs: 7711160425 8200416590.Front Wheel Hub Bearing | Renault Clio 3 RS - Megane 3 / 4 RS
                                              Prevent low-frequency cabin droning, structural wheel hub play, and the degradation of your steering accuracy under heavy cornering loads. The heavy-duty Front Wheel Hub Bearing for Clio 3 RS, Megane 3 RS, and Megane 4 RS secures the structural alignment of your front axle...
                                              €123.42Price
                                              Uprated front wheel hub bearing for Renault Clio 3 RS and Megane 3 / 4 RS, SKUs: 7711160425 8200416590.Front Wheel Hub Bearing | Renault Clio 3 RS - Megane 3 / 4 RS
                                                  Prevent low-frequency cabin droning, structural wheel hub play, and the degradation of your steering accuracy under heavy cornering loads. The heavy-duty Front Wheel Hub Bearing for Clio 3 RS, Megane 3 RS, and Megane 4 RS secures the structural alignment of your front axle...
                                                  €123.42Price
                                                  Sadev F1903051 Limited Slip Differential Cover for Renault Clio 2 Gr N (ST66 Gearbox)Sadev F1903051 Limited Slip Differential Cover for Renault Clio 2 Gr N (ST66 Gearbox)
                                                      An essential competition part, the Sadev F1903051 Limited Slip Differential Cover is designed to ensure perfect sealing and protection for the differential of your Renault Clio 2 Gr N ( Sadev ST66 gearbox). A failure of this component could compromise the entire...
                                                      €288.46Price
                                                      Sadev F1903051 Limited Slip Differential Cover for Renault Clio 2 Gr N (ST66 Gearbox)Sadev F1903051 Limited Slip Differential Cover for Renault Clio 2 Gr N (ST66 Gearbox)
                                                          An essential competition part, the Sadev F1903051 Limited Slip Differential Cover is designed to ensure perfect sealing and protection for the differential of your Renault Clio 2 Gr N ( Sadev ST66 gearbox). A failure of this component could compromise the entire...
                                                          €288.46Price
                                                          En Stock
                                                          €73.82 Price
                                                          En Stock
                                                          €73.82 Price
                                                          Tripode cardan Clio Gr N
                                                              The Tripod Driveshaft Clio Group N , references A-7711129526 and  is a reinforced tripod driveshaft component designed for Renault Clio Group N competition applications. Developed for demanding motorsport use, this component is intended for vehicles subjected to increased drivetrain loads during rally and track use. A...
                                                              €73.82Price
                                                              Tripode cardan Clio Gr N
                                                                  The Tripod Driveshaft Clio Group N , references A-7711129526 and  is a reinforced tripod driveshaft component designed for Renault Clio Group N competition applications. Developed for demanding motorsport use, this component is intended for vehicles subjected to increased drivetrain loads during rally and track use. A...
                                                                  €73.82Price
                                                                  En Stock
                                                                  €192.10 Price
                                                                  En Stock
                                                                  €192.10 Price
                                                                  Left Drive Shaft (Transmission) Renault Megane 2 RSLeft Drive Shaft (Transmission) Renault Megane 2 RS
                                                                      Do not let a failing transmission ground your sports car. Since the original manufacturer part is now discontinued, we have selected this high-quality re-manufactured left drive shaft (transmission) for Renault Megane 2 RS . Engineered to handle the torque of the F4RT engine, this brand new drive shaft perfectly replaces your worn component, eliminating...
                                                                      €192.10Price
                                                                      Left Drive Shaft (Transmission) Renault Megane 2 RSLeft Drive Shaft (Transmission) Renault Megane 2 RS
                                                                          Do not let a failing transmission ground your sports car. Since the original manufacturer part is now discontinued, we have selected this high-quality re-manufactured left drive shaft (transmission) for Renault Megane 2 RS . Engineered to handle the torque of the F4RT engine, this brand new drive shaft perfectly replaces your worn component, eliminating...
                                                                          €192.10Price
                                                                          Roulement différentiel côté grand cardan Boite TL4 Clio 3 RS
                                                                              Optimize the performance of your Clio 3 RS with the genuine Renault differential bearing on the large driveshaft side! <p style="margin:1rem 0px;color:#1f1f1f;font-family:'Google Sans', 'Helvetica Neue',...
                                                                              €55.55Price
                                                                              Roulement différentiel côté grand cardan Boite TL4 Clio 3 RS
                                                                                  Optimize the performance of your Clio 3 RS with the genuine Renault differential bearing on the large driveshaft side! <p style="margin:1rem 0px;color:#1f1f1f;font-family:'Google Sans', 'Helvetica Neue',...
                                                                                  €55.55Price
                                                                                  Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                                                                                      Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                                                                                      €37.96Price
                                                                                      Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                                                                                          Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
                                                                                          €37.96Price
                                                                                          En Stock
                                                                                          €55.55 Price
                                                                                          En Stock
                                                                                          €55.55 Price
                                                                                          Roulement de différentiel coté droit Megane 3 RSRoulement de différentiel coté droit Megane 3 RS
                                                                                              Roulement de différentiel coté droit Megane 3 RS
                                                                                              €55.55Price
                                                                                              Roulement de différentiel coté droit Megane 3 RSRoulement de différentiel coté droit Megane 3 RS
                                                                                                  Roulement de différentiel coté droit Megane 3 RS
                                                                                                  €55.55Price
                                                                                                  En Stock
                                                                                                  €450.43 Price
                                                                                                  En Stock
                                                                                                  €450.43 Price
                                                                                                  SADEV Left Driveshaft F1908352 - ST75 Clio 3 CupSADEV Left Driveshaft F1908352 - ST75 Clio 3 Cup
                                                                                                      The SADEV Left Driveshaft (references F1908352 / 7711160447 ) is the main element of the left driveshaft, ensuring the link between the Lobro joint (gearbox side) and the wheel hub carrier . Designed to withstand intense torque efforts in motorsport , it is homologated for the Renault...
                                                                                                      €450.43Price
                                                                                                      SADEV Left Driveshaft F1908352 - ST75 Clio 3 CupSADEV Left Driveshaft F1908352 - ST75 Clio 3 Cup
                                                                                                          The SADEV Left Driveshaft (references F1908352 / 7711160447 ) is the main element of the left driveshaft, ensuring the link between the Lobro joint (gearbox side) and the wheel hub carrier . Designed to withstand intense torque efforts in motorsport , it is homologated for the Renault...
                                                                                                          €450.43Price
                                                                                                          Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                                                                                              Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                                                                                              €32.11Price
                                                                                                              Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                                                                                                  Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
                                                                                                                  €32.11Price
                                                                                                                  En Stock
                                                                                                                  €55.55 Price
                                                                                                                  En Stock
                                                                                                                  €55.55 Price
                                                                                                                  Roulement de différentiel coté gauche Megane 3 RSRoulement de différentiel coté gauche Megane 3 RS
                                                                                                                      Roulement de différentiel coté gauche Megane 3 RS
                                                                                                                      €55.55Price
                                                                                                                      Roulement de différentiel coté gauche Megane 3 RSRoulement de différentiel coté gauche Megane 3 RS
                                                                                                                          Roulement de différentiel coté gauche Megane 3 RS
                                                                                                                          €55.55Price
                                                                                                                          Roulement arbre secondaire côté embrayage Boite TL4 Clio 3 RS
                                                                                                                              Original RENAULT secondary shaft bearing (clutch side) for TL4 type gearboxes fitted to Renault Clio 3 RS vehicles. An essential part for the proper functioning of your transmission. Discover other gearbox bearings in the related products section at the bottom of the page.
                                                                                                                              €60.40Price
                                                                                                                              Roulement arbre secondaire côté embrayage Boite TL4 Clio 3 RS
                                                                                                                                  Original RENAULT secondary shaft bearing (clutch side) for TL4 type gearboxes fitted to Renault Clio 3 RS vehicles. An essential part for the proper functioning of your transmission. Discover other gearbox bearings in the related products section at the bottom of the page.
                                                                                                                                  €60.40Price
                                                                                                                                  En Stock
                                                                                                                                  €10.49 Price
                                                                                                                                  En Stock
                                                                                                                                  €10.49 Price
                                                                                                                                  Cage aiguille pignon fou 6ème Boite TL4 Clio 3 RS
                                                                                                                                      Ensure your transmission's longevity with this genuine Renault needle cage for the 6th speed gear . Specifically designed for the TL4 gearbox of your Clio 3 RS , this essential engine component prevents whining noises and premature failure. Do not risk your gearbox integrity with...
                                                                                                                                      €10.49Price
                                                                                                                                      Cage aiguille pignon fou 6ème Boite TL4 Clio 3 RS
                                                                                                                                          Ensure your transmission's longevity with this genuine Renault needle cage for the 6th speed gear . Specifically designed for the TL4 gearbox of your Clio 3 RS , this essential engine component prevents whining noises and premature failure. Do not risk your gearbox integrity with...
                                                                                                                                          €10.49Price
                                                                                                                                          En Stock
                                                                                                                                          €29.71 Price
                                                                                                                                          En Stock
                                                                                                                                          €29.71 Price
                                                                                                                                          Reinforced input shaft ball bearing (6th gear side) for Renault Clio 3 RS 6-speed manual TL4 gearboxes.
                                                                                                                                              Do not risk a persistent transmission whine, severe internal gear mesh destruction, or a catastrophic input shaft snap under heavy loads. The premium Roulement arbre primaire côté 6ème boite TL4 Clio 3 RS is the critical factory-spec replacement bearing required to restore...
                                                                                                                                              €29.71Price
                                                                                                                                              Reinforced input shaft ball bearing (6th gear side) for Renault Clio 3 RS 6-speed manual TL4 gearboxes.
                                                                                                                                                  Do not risk a persistent transmission whine, severe internal gear mesh destruction, or a catastrophic input shaft snap under heavy loads. The premium Roulement arbre primaire côté 6ème boite TL4 Clio 3 RS is the critical factory-spec replacement bearing required to restore...
                                                                                                                                                  €29.71Price
                                                                                                                                                  Rondelle belleville galbe 1,20 Clio Gr N
                                                                                                                                                      1.20 Belleville Washer SADEV ST66 (F0085914) Precisely adjust the locking differential preload with this genuine Renault Sport 1.20 Belleville washer, manufactured by SADEV. Designed for the Renault Clio 2 Gr N equipped with the ST66 gearbox, it ensures optimal preload. Essential for maximum performance in competition.
                                                                                                                                                      €64.43Price
                                                                                                                                                      Rondelle belleville galbe 1,20 Clio Gr N
                                                                                                                                                          1.20 Belleville Washer SADEV ST66 (F0085914) Precisely adjust the locking differential preload with this genuine Renault Sport 1.20 Belleville washer, manufactured by SADEV. Designed for the Renault Clio 2 Gr N equipped with the ST66 gearbox, it ensures optimal preload. Essential for maximum performance in competition.
                                                                                                                                                          €64.43Price
                                                                                                                                                          Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                                                                                                              Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                                                                                                              €28.99Price
                                                                                                                                                              Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                                                                                                                  Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
                                                                                                                                                                  €28.99Price
                                                                                                                                                                  En Stock
                                                                                                                                                                  €12.64 Price
                                                                                                                                                                  En Stock
                                                                                                                                                                  €12.64 Price
                                                                                                                                                                  Vis fixation pignon arbre secondaire JC5 JR5
                                                                                                                                                                      Secure your transmission with this genuine Renault pinion fixing bolt . Essential for maintaining the secondary shaft on JC5 and JR5 type gearboxes, this component is critical for the reliability of your Renault Clio 2 RS or Twingo 2 RS . Do not take any risks with used...
                                                                                                                                                                      €12.64Price
                                                                                                                                                                      Vis fixation pignon arbre secondaire JC5 JR5
                                                                                                                                                                          Secure your transmission with this genuine Renault pinion fixing bolt . Essential for maintaining the secondary shaft on JC5 and JR5 type gearboxes, this component is critical for the reliability of your Renault Clio 2 RS or Twingo 2 RS . Do not take any risks with used...
                                                                                                                                                                          €12.64Price
                                                                                                                                                                          En Stock
                                                                                                                                                                          €269.30 Price
                                                                                                                                                                          En Stock
                                                                                                                                                                          €269.30 Price
                                                                                                                                                                          Couvercle autobloquant équipé Megane N4Couvercle autobloquant équipé Megane N4
                                                                                                                                                                              Couvercle autobloquant équipé Megane N4 Référence; 7711167442
                                                                                                                                                                              €269.30Price
                                                                                                                                                                              Couvercle autobloquant équipé Megane N4Couvercle autobloquant équipé Megane N4
                                                                                                                                                                                  Couvercle autobloquant équipé Megane N4 Référence; 7711167442
                                                                                                                                                                                  €269.30Price
                                                                                                                                                                                  Jeu de 2 plateaux d'autobloquant (23°/85°-23°65°) Twingo R2Jeu de 2 plateaux d'autobloquant (23°/85°-23°65°) Twingo R2
                                                                                                                                                                                      Jeu de 2 plateaux d'autobloquant (23°/85°-23°65°) Twingo R2
                                                                                                                                                                                      €564.20Price
                                                                                                                                                                                      Jeu de 2 plateaux d'autobloquant (23°/85°-23°65°) Twingo R2Jeu de 2 plateaux d'autobloquant (23°/85°-23°65°) Twingo R2
                                                                                                                                                                                          Jeu de 2 plateaux d'autobloquant (23°/85°-23°65°) Twingo R2
                                                                                                                                                                                          €564.20Price
                                                                                                                                                                                          Clio Group N BJ100 Bell (7711167493) - 23C Hub / 35T JointClio Group N BJ100 Bell (7711167493) - 23C Hub / 35T Joint
                                                                                                                                                                                              Optimize your racing transmission with the BJ100 Transmission Bell (23C Hub / 35 Spline Joint) specifically designed for the Clio Group N . This technical part, under reference 7711167493 , is the central element for ensuring power delivery to...
                                                                                                                                                                                              €324.79Price
                                                                                                                                                                                              Clio Group N BJ100 Bell (7711167493) - 23C Hub / 35T JointClio Group N BJ100 Bell (7711167493) - 23C Hub / 35T Joint
                                                                                                                                                                                                  Optimize your racing transmission with the BJ100 Transmission Bell (23C Hub / 35 Spline Joint) specifically designed for the Clio Group N . This technical part, under reference 7711167493 , is the central element for ensuring power delivery to...
                                                                                                                                                                                                  €324.79Price
                                                                                                                                                                                                  En Stock
                                                                                                                                                                                                  €86.59 Price
                                                                                                                                                                                                  En Stock
                                                                                                                                                                                                  €86.59 Price
                                                                                                                                                                                                  Wheel CV Boot Renault Clio 3 X85 Cup (Genuine RS)Wheel CV Boot Renault Clio 3 X85 Cup (Genuine RS)
                                                                                                                                                                                                      Genuine Renault Sport Clio 3 X85 Cup Wheel Side CV Boot (Driveshaft Boot) Don't let dust and debris damage your transmission! This genuine Renault Sport wheel side CV boot (ref. 7701473176) is essential for protecting the joint of your driveshaft on your Renault Clio 3 X85 Cup . Preserve the longevity of...
                                                                                                                                                                                                      €86.59Price
                                                                                                                                                                                                      Wheel CV Boot Renault Clio 3 X85 Cup (Genuine RS)Wheel CV Boot Renault Clio 3 X85 Cup (Genuine RS)
                                                                                                                                                                                                          Genuine Renault Sport Clio 3 X85 Cup Wheel Side CV Boot (Driveshaft Boot) Don't let dust and debris damage your transmission! This genuine Renault Sport wheel side CV boot (ref. 7701473176) is essential for protecting the joint of your driveshaft on your Renault Clio 3 X85 Cup . Preserve the longevity of...
                                                                                                                                                                                                          €86.59Price