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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.

Active filters

En Stock
€8,650.80 Price
En Stock
€8,650.80 Price
SADEV 12x53 Sequential Gearbox - Twingo R2SADEV 12x53 Sequential Gearbox - Twingo R2
      SADEV 12x53 Sequential Gearbox - Renault Twingo R2 Optimize the performance of your Renault Twingo R2 with this 12x53 short-ratio sequential gearbox. From the Renault Sport catalog (ref: 7711167607) and manufactured by SADEV, it offers fast and precise gear changes for intense sports driving. Discover associated products at the bottom of the page. ...
      €8,650.80Price
      SADEV 12x53 Sequential Gearbox - Twingo R2SADEV 12x53 Sequential Gearbox - Twingo R2
          SADEV 12x53 Sequential Gearbox - Renault Twingo R2 Optimize the performance of your Renault Twingo R2 with this 12x53 short-ratio sequential gearbox. From the Renault Sport catalog (ref: 7711167607) and manufactured by SADEV, it offers fast and precise gear changes for intense sports driving. Discover associated products at the bottom of the page. ...
          €8,650.80Price
          Dispo selon configuration
          €13.02 €15.14 Regular price -14% off Price
          Dispo selon configuration
          €13.02 €15.14 Regular price -14% off Price
          Collection Bague Palier Axe Clio RS et Gr NCollection Bague Palier Axe Clio RS et Gr N
            • Pack
            Collection Bague Palier Axe Clio RS et Gr N
            €13.02€15.14Regular price-14% offPrice
            Collection Bague Palier Axe Clio RS et Gr NCollection Bague Palier Axe Clio RS et Gr N
              • Pack
              Collection Bague Palier Axe Clio RS et Gr N
              €13.02€15.14Regular price-14% offPrice
              En Stock
              €207.65 Price
              En Stock
              €207.65 Price
              Roue de marche arrière 34 dents Twingo R2Roue de marche arrière 34 dents Twingo R2
                  Roue de marche arrière 34 dents Twingo R2 Référence: 7711163836
                  €207.65Price
                  Roue de marche arrière 34 dents Twingo R2Roue de marche arrière 34 dents Twingo R2
                      Roue de marche arrière 34 dents Twingo R2 Référence: 7711163836
                      €207.65Price
                      En Stock
                      €0.58 Price
                      En Stock
                      €0.58 Price
                      Ecrou HM M12x125 cable embrayage Clio 2 Cup X65Ecrou HM M12x125 cable embrayage Clio 2 Cup X65
                          Ecrou HM M12x125 cable embrayage Clio 2 Cup X65 Référence: 7711051342
                          €0.58Price
                          Ecrou HM M12x125 cable embrayage Clio 2 Cup X65Ecrou HM M12x125 cable embrayage Clio 2 Cup X65
                              Ecrou HM M12x125 cable embrayage Clio 2 Cup X65 Référence: 7711051342
                              €0.58Price
                              En Stock
                              €4.40 Price
                              En Stock
                              €4.40 Price
                              Contre écrou câble embrayage Clio 2 Cup X65
                                  Contre écrou câble embrayage Clio 2 Cup X65 Référence: 7903032012
                                  €4.40Price
                                  Contre écrou câble embrayage Clio 2 Cup X65
                                      Contre écrou câble embrayage Clio 2 Cup X65 Référence: 7903032012
                                      €4.40Price
                                      En Stock
                                      €121.31 Price
                                      En Stock
                                      €121.31 Price
                                      Renault Assembled Gear Lever Shaft - Megane 3 RS / N4Renault Assembled Gear Lever Shaft - Megane 3 RS / N4
                                          Don't let excessive play or poor gear changes spoil your sporty driving experience. This genuine Renault assembled gear lever shaft is designed specifically for the Renault Megane 3 RS and Renault Megane N4 . Ensure precise and responsive transmission. You can also find other associated gearbox linkage components on this page.
                                          €121.31Price
                                          Renault Assembled Gear Lever Shaft - Megane 3 RS / N4Renault Assembled Gear Lever Shaft - Megane 3 RS / N4
                                              Don't let excessive play or poor gear changes spoil your sporty driving experience. This genuine Renault assembled gear lever shaft is designed specifically for the Renault Megane 3 RS and Renault Megane N4 . Ensure precise and responsive transmission. You can also find other associated gearbox linkage components on this page.
                                              €121.31Price
                                              Vis M7x45SADEV M7x45 Screw ST66 Gearbox – 5th Insert Fastener Clio 2 Gr N (0301331)
                                                  Do not neglect any component of your transmission! This M7x45 SADEV screw (P/N: 0301331 ) is the essential genuine part for securing the 5th gear threaded insert of your ST66 dog-ring gearbox . Intended for the Renault Clio 2 Gr N , this screw ensures the crucial retention of the 5th gear components. A faulty...
                                                  €34.37Price
                                                  Vis M7x45SADEV M7x45 Screw ST66 Gearbox – 5th Insert Fastener Clio 2 Gr N (0301331)
                                                      Do not neglect any component of your transmission! This M7x45 SADEV screw (P/N: 0301331 ) is the essential genuine part for securing the 5th gear threaded insert of your ST66 dog-ring gearbox . Intended for the Renault Clio 2 Gr N , this screw ensures the crucial retention of the 5th gear components. A faulty...
                                                      €34.37Price
                                                      SADEV ST75 Gearbox Potentiometer Renault Clio 3 X85 Cup Ref. 0101908100SADEV ST75 Gearbox Potentiometer Renault Clio 3 X85 Cup Ref. 0101908100
                                                          A faulty potentiometer on your SADEV ST75 gearbox means losing engine control and reliability in the race! Do not compromise the performance of your Renault Clio 3 Cup . The SADEV Gearbox Potentiometer (Ref. 0101908100 / F1908100 ), distributed by Optimiz...
                                                          €246.54Price
                                                          SADEV ST75 Gearbox Potentiometer Renault Clio 3 X85 Cup Ref. 0101908100SADEV ST75 Gearbox Potentiometer Renault Clio 3 X85 Cup Ref. 0101908100
                                                              A faulty potentiometer on your SADEV ST75 gearbox means losing engine control and reliability in the race! Do not compromise the performance of your Renault Clio 3 Cup . The SADEV Gearbox Potentiometer (Ref. 0101908100 / F1908100 ), distributed by Optimiz...
                                                              €246.54Price
                                                              En Stock
                                                              €8,650.80 Price
                                                              En Stock
                                                              €8,650.80 Price
                                                              SADEV 12x57 Sequential Gearbox - Twingo R2SADEV 12x57 Sequential Gearbox - Twingo R2
                                                                  SADEV 12x57 Sequential Gearbox - Renault Twingo R2 Optimize the performance of your Renault Twingo R2 with this 12x57 short-ratio sequential gearbox. From the Renault Sport catalog (ref: 7711167607) and manufactured by SADEV, it offers fast and precise gear changes for intense sports driving. Discover associated products at the bottom of the page. ...
                                                                  €8,650.80Price
                                                                  SADEV 12x57 Sequential Gearbox - Twingo R2SADEV 12x57 Sequential Gearbox - Twingo R2
                                                                      SADEV 12x57 Sequential Gearbox - Renault Twingo R2 Optimize the performance of your Renault Twingo R2 with this 12x57 short-ratio sequential gearbox. From the Renault Sport catalog (ref: 7711167607) and manufactured by SADEV, it offers fast and precise gear changes for intense sports driving. Discover associated products at the bottom of the page. ...
                                                                      €8,650.80Price
                                                                      Levier commande Boite de vitesseRenault Sport Sequential Gear Lever for Twingo R2 / Clio R3
                                                                          Do not let excessive play or a worn gear shift assembly compromise your stage times. This genuine Renault Sport sequential gear lever is the only official homologated part designed to restore the surgical precision required by your racing transmission. Specifically engineered for the cabins of the Renault Twingo R2 and Renault Clio R3 , this rally gear lever...
                                                                          €363.95Price
                                                                          Levier commande Boite de vitesseRenault Sport Sequential Gear Lever for Twingo R2 / Clio R3
                                                                              Do not let excessive play or a worn gear shift assembly compromise your stage times. This genuine Renault Sport sequential gear lever is the only official homologated part designed to restore the surgical precision required by your racing transmission. Specifically engineered for the cabins of the Renault Twingo R2 and Renault Clio R3 , this rally gear lever...
                                                                              €363.95Price
                                                                              En Stock
                                                                              €45.46 Price
                                                                              En Stock
                                                                              €45.46 Price
                                                                              Roulement de differentiel Clio Gr N
                                                                                  Small Differential Bearing SADEV ST66 (0101034) Ensure the optimal performance of your SADEV ST66 gearbox with this genuine Renault Sport small differential bearing. Designed for the Clio Gr N, it guarantees precise and reliable operation. Essential for maintaining your transmission's performance.
                                                                                  €45.46Price
                                                                                  Roulement de differentiel Clio Gr N
                                                                                      Small Differential Bearing SADEV ST66 (0101034) Ensure the optimal performance of your SADEV ST66 gearbox with this genuine Renault Sport small differential bearing. Designed for the Clio Gr N, it guarantees precise and reliable operation. Essential for maintaining your transmission's performance.
                                                                                      €45.46Price
                                                                                      Goupille Mécanindus Ø 2,5 x 20 pour boite crabot Clio 2 RS Gr N
                                                                                          Goupille Mécanindus Ø 2,5 x 20 pour boite crabot Clio 2 RS Gr N Référence: 0701013
                                                                                          €0.17Price
                                                                                          Goupille Mécanindus Ø 2,5 x 20 pour boite crabot Clio 2 RS Gr N
                                                                                              Goupille Mécanindus Ø 2,5 x 20 pour boite crabot Clio 2 RS Gr N Référence: 0701013
                                                                                              €0.17Price
                                                                                              Goupille Mécanindus Ø 4 x 20 pour boite crabot Clio 2 RS Gr N
                                                                                                  Goupille Mécanindus Ø 4 x 20 pour boite crabot Clio 2 RS Gr N Référence: 0701015
                                                                                                  €0.30Price
                                                                                                  Goupille Mécanindus Ø 4 x 20 pour boite crabot Clio 2 RS Gr N
                                                                                                      Goupille Mécanindus Ø 4 x 20 pour boite crabot Clio 2 RS Gr N Référence: 0701015
                                                                                                      €0.30Price
                                                                                                      En Stock
                                                                                                      €11.33 Price
                                                                                                      En Stock
                                                                                                      €11.33 Price
                                                                                                      Joint double lèvres viton Ø24x36x7 Twingo R2Joint double lèvres viton Ø24x36x7 Twingo R2
                                                                                                          Joint double lèvres viton Ø24x36x7 Twingo R2 Référence: 7711162290
                                                                                                          €11.33Price
                                                                                                          Joint double lèvres viton Ø24x36x7 Twingo R2Joint double lèvres viton Ø24x36x7 Twingo R2
                                                                                                              Joint double lèvres viton Ø24x36x7 Twingo R2 Référence: 7711162290
                                                                                                              €11.33Price
                                                                                                              En Stock
                                                                                                              €154.98 Price
                                                                                                              En Stock
                                                                                                              €154.98 Price
                                                                                                              Outil de précharge fixe - grosse tulipe Twingo R2
                                                                                                                  Outil de précharge mobile - grosse tulipe Twingo R2 Référence: 7711163984
                                                                                                                  €154.98Price
                                                                                                                  Outil de précharge fixe - grosse tulipe Twingo R2
                                                                                                                      Outil de précharge mobile - grosse tulipe Twingo R2 Référence: 7711163984
                                                                                                                      €154.98Price
                                                                                                                      En Stock
                                                                                                                      €196.50 Price
                                                                                                                      En Stock
                                                                                                                      €196.50 Price
                                                                                                                      Outil de précharge mobile - grosse tulipe Twingo R2Outil de précharge mobile - grosse tulipe Twingo R2
                                                                                                                          Outil de précharge mobile - grosse tulipe Twingo R2 Référence: 7711163983
                                                                                                                          €196.50Price
                                                                                                                          Outil de précharge mobile - grosse tulipe Twingo R2Outil de précharge mobile - grosse tulipe Twingo R2
                                                                                                                              Outil de précharge mobile - grosse tulipe Twingo R2 Référence: 7711163983
                                                                                                                              €196.50Price
                                                                                                                              Raccord adaptation fléxible sur emetteur embrayage Megane N4
                                                                                                                                  Raccord adaptation fléxible sur emetteur embrayage Megane N4 Référence: 7711167177
                                                                                                                                  €32.15Price
                                                                                                                                  Raccord adaptation fléxible sur emetteur embrayage Megane N4
                                                                                                                                      Raccord adaptation fléxible sur emetteur embrayage Megane N4 Référence: 7711167177
                                                                                                                                      €32.15Price
                                                                                                                                      Tuyau entre support connecteur et emetteur embrayage Megane N4Tuyau entre support connecteur et emetteur embrayage Megane N4
                                                                                                                                          Tuyau entre support connecteur et emetteur embrayage Megane N4 Référence: 7711167176
                                                                                                                                          €41.02Price
                                                                                                                                          Tuyau entre support connecteur et emetteur embrayage Megane N4Tuyau entre support connecteur et emetteur embrayage Megane N4
                                                                                                                                              Tuyau entre support connecteur et emetteur embrayage Megane N4 Référence: 7711167176
                                                                                                                                              €41.02Price
                                                                                                                                              En Stock
                                                                                                                                              €57.83 Price
                                                                                                                                              En Stock
                                                                                                                                              €57.83 Price
                                                                                                                                              Tuyau entre butée embrayage et support connecteur Megane N4Renault Sport Clutch Hydraulic Hose - Megane N4
                                                                                                                                                  The Renault Sport Hydraulic Hose between Clutch Release Bearing and Connector Support (ref. 7711167175) is an official RENAULT SPORT part designed specifically for the Renault Megane N4 . It ensures a precise and reliable hydraulic connection in the clutch circuit. Optimiz Access is the official distributor of this part.
                                                                                                                                                  €57.83Price
                                                                                                                                                  Tuyau entre butée embrayage et support connecteur Megane N4Renault Sport Clutch Hydraulic Hose - Megane N4
                                                                                                                                                      The Renault Sport Hydraulic Hose between Clutch Release Bearing and Connector Support (ref. 7711167175) is an official RENAULT SPORT part designed specifically for the Renault Megane N4 . It ensures a precise and reliable hydraulic connection in the clutch circuit. Optimiz Access is the official distributor of this part.
                                                                                                                                                      €57.83Price
                                                                                                                                                      Joint de liaison boite cardan droit Megane N4Right-Hand Gearbox-to-Driveshaft Joint Renault Mégane N4
                                                                                                                                                          Joint de liaison boîte-cardan droit – Renault Mégane N4 Le joint de liaison entre la boîte de vitesses et le cardan droit est destiné aux configurations compatibles de la Renault Mégane N4. Il participe à la liaison mécanique entre la transmission et le cardan, contribuant au bon fonctionnement de la transmission du véhicule.
                                                                                                                                                          €24.95Price
                                                                                                                                                          Joint de liaison boite cardan droit Megane N4Right-Hand Gearbox-to-Driveshaft Joint Renault Mégane N4
                                                                                                                                                              Joint de liaison boîte-cardan droit – Renault Mégane N4 Le joint de liaison entre la boîte de vitesses et le cardan droit est destiné aux configurations compatibles de la Renault Mégane N4. Il participe à la liaison mécanique entre la transmission et le cardan, contribuant au bon fonctionnement de la transmission du véhicule.
                                                                                                                                                              €24.95Price
                                                                                                                                                              Cable de commande Marche Arriere
                                                                                                                                                                  Don't let a faulty reverse gear unlock cable deprive you of an essential function for your Renault Twingo R2 or Renault Clio R3 equipped with a SADEV sequential gearbox. This cable, official Renault Sport reference 7711162442 , ensures reliable access to reverse gear. You can also find other associated transmission components...
                                                                                                                                                                  €258.66Price
                                                                                                                                                                  Cable de commande Marche Arriere
                                                                                                                                                                      Don't let a faulty reverse gear unlock cable deprive you of an essential function for your Renault Twingo R2 or Renault Clio R3 equipped with a SADEV sequential gearbox. This cable, official Renault Sport reference 7711162442 , ensures reliable access to reverse gear. You can also find other associated transmission components...
                                                                                                                                                                      €258.66Price
                                                                                                                                                                      En Stock
                                                                                                                                                                      €0.41 Price
                                                                                                                                                                      En Stock
                                                                                                                                                                      €0.41 Price
                                                                                                                                                                      3x20 Mécanindus Dowel Pin Renault Clio 2 Group N - Ref. 0701002
                                                                                                                                                                          The Ø 3 x 20 Mécanindus Dowel Pin , reference 0701002 , is a mechanical fastening component intended in particular for the Renault Clio 2 Group N . With a 3 mm diameter and 20 mm length, this pin is suitable for replacing a worn, damaged or missing fastening pin during maintenance or mechanical assembly work. On a sports or competition...
                                                                                                                                                                          €0.41Price
                                                                                                                                                                          3x20 Mécanindus Dowel Pin Renault Clio 2 Group N - Ref. 0701002
                                                                                                                                                                              The Ø 3 x 20 Mécanindus Dowel Pin , reference 0701002 , is a mechanical fastening component intended in particular for the Renault Clio 2 Group N . With a 3 mm diameter and 20 mm length, this pin is suitable for replacing a worn, damaged or missing fastening pin during maintenance or mechanical assembly work. On a sports or competition...
                                                                                                                                                                              €0.41Price
                                                                                                                                                                              Support baladeur de 5ème Clio Gr N
                                                                                                                                                                                  Ensure the rigidity and precision of your SADEV gearbox ! This 5th speed slider support (Ref. F1903014 ) is a SADEV brand part designed for the <strong...
                                                                                                                                                                                  €72.92Price
                                                                                                                                                                                  Support baladeur de 5ème Clio Gr N
                                                                                                                                                                                      Ensure the rigidity and precision of your SADEV gearbox ! This 5th speed slider support (Ref. F1903014 ) is a SADEV brand part designed for the <strong...
                                                                                                                                                                                      €72.92Price
                                                                                                                                                                                      SADEV Primary Shaft ST66 Dog-ring Gearbox – Clio 2 Gr N (F1903001)SADEV Primary Shaft ST66 Dog-ring Gearbox – Clio 2 Gr N (F1903001)
                                                                                                                                                                                          The heart of power transmission ! This SADEV Primary Shaft (P/N: F1903001 ) is the master piece that directly receives torque from the engine via the clutch in your Renault Clio 2 Gr N's ST66 dog-ring gearbox . Cracks, premature spline wear, or deformation of this shaft not only compromise the reliability of the...
                                                                                                                                                                                          €899.60Price
                                                                                                                                                                                          SADEV Primary Shaft ST66 Dog-ring Gearbox – Clio 2 Gr N (F1903001)SADEV Primary Shaft ST66 Dog-ring Gearbox – Clio 2 Gr N (F1903001)
                                                                                                                                                                                              The heart of power transmission ! This SADEV Primary Shaft (P/N: F1903001 ) is the master piece that directly receives torque from the engine via the clutch in your Renault Clio 2 Gr N's ST66 dog-ring gearbox . Cracks, premature spline wear, or deformation of this shaft not only compromise the reliability of the...
                                                                                                                                                                                              €899.60Price
                                                                                                                                                                                              En Stock
                                                                                                                                                                                              €345.72 Price
                                                                                                                                                                                              En Stock
                                                                                                                                                                                              €345.72 Price
                                                                                                                                                                                              Renault Sport 20x27 4th Gear Ratio - Renault Twingo R2Renault Sport 20x27 4th Gear Ratio - Renault Twingo R2
                                                                                                                                                                                                  Optimize the performance of your Renault Twingo R2 with this 20x27 4th gear ratio, an official Renault Sport part (ref. 7711162379) manufactured by SADEV. Designed for the SADEV sequential gearbox, it enhances your transmission's gearing for improved performance.
                                                                                                                                                                                                  €345.72Price
                                                                                                                                                                                                  Renault Sport 20x27 4th Gear Ratio - Renault Twingo R2Renault Sport 20x27 4th Gear Ratio - Renault Twingo R2
                                                                                                                                                                                                      Optimize the performance of your Renault Twingo R2 with this 20x27 4th gear ratio, an official Renault Sport part (ref. 7711162379) manufactured by SADEV. Designed for the SADEV sequential gearbox, it enhances your transmission's gearing for improved performance.
                                                                                                                                                                                                      €345.72Price