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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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The SADEV Secondary Shaft Nut (F1903204) is a critical safety part ensuring the final drive is held securely on the secondary shaft of your SADEV ST66 gearbox. This nut is an original SADEV component, essential for the Renault Clio 2 Group N .
Replacing this nut...
€16.88Price
Support baladeur petites cannelures Twingo R2
Référence: 7711163828
F1705204
€156.40Price
Cavalier retenue billage Clio Gr N
Référence: 7700112404
€10.99Price
Bague de roulement de primaire NU1007 Twingo R2
Référence: 7711163825
€81.08Price
Carter cassette renforcé Twingo R2 Référence: 7711163832
€1,306.28Price
Secure your drivetrain with the authentic Renault Sport Phase 2 half-shaft (right differential output) . Manufactured by SADEV for the Clio 2 Gr.N equipped with the ST66 gearbox , this critical component is built to withstand the extreme stresses of rallying. Do not risk a failure mid-stage by...
€295.69Price
Guarantee the precision of 2nd and 3rd gears in your SADEV ST66 gearbox ! This 2nd-3rd gear stepped thrust washer (Ref. F1903017 ) from SADEV is essential for axial...
€97.82Price
A vital component for the precision of your ST66 SADEV dog-ring gearbox : the needle roller cage (P/N: 0105019 or 0100105019 ). Designed for the Renault Clio 2 Gr N , this cage ensures the smooth operation of the bearing on the 1st and 2nd-3rd gear thrust washers . A worn cage guarantees you...
€37.50Price
Adaptateur droit alu 3/4X16-M18X150 - sortie BV Megane N4
Référence: 7711167097
€16.43Price
Tuyau entre échangeur et BV Megane N4
Référence: 7711167093
€165.20Price
Tuyau entre pompe / échangeur Megane N4
Référence: 7711167094
€196.15Price
Adaptateur droit alu 3/4X16-3/8X18 pompe Megane N4
Référence: 7711167096
€12.16Price
Tuyau entre filtre / pompe Megane N4
Référence: 7711167092
€133.16Price
Tuyau entre BV / filtre Megane N4
Référence: 7711167095
€117.17Price
Adaptateur bandjo alu entrée BV 3/4X16-16mm Megane N4
Référence: 7711167099
€31.73Price
Joint torique Ø6x1.5 raccord male butée Clio 3 RS, R3, X85 Cup et Twingo R2
€0.98Price
Tuyau Butée Clio 3 RS, R3, X85 Cup et Twingo R2
vendu sans adaptateur, vous pouvez le retrouver des les produits associés plus bas sur cette page
Permet de supprimer l'accumulateur de pression d'origine
Hormis pour la R2, prevoir l'adaptateur en produit associé
Référence: 7711160252
€136.43Price
Joint torique Ø int 6.07 Øtore1.78 Megane N4
Ref: 7711167287
€1.12Price
Douille 46 Cannelures Megane N4
Douille nécessaire pour les révisions de la boite Sadev
€124.87Price
Purge Recepteur Formule Renault 2.0 et Renault Tatuus
Référence: 7711150524
Produit également compatible pour les étriers Alcon de la Formule Renault Tatuus
€25.85Price
Don't let a simple part compromise the performance of your Renault Clio 2 Gr N ! This gearbox oil seal (P/N: 0205047 ) is the essential original part to ensure the perfect sealing of your ST66 SADEV gearbox. By choosing this oil seal, you prevent critical transmission oil leaks that could...
€6.62Price
Dose Graisse 180G Coté Boite Twingo R2 Référence: 7711162392
€20.00Price
Secure your transmission with this reinforced drive shaft nut specifically selected for the Clio Group N . Identified under reference 7700422361 , this component ensures your axle remains perfectly seated in the hub, even under the most...
€3.49Price
Clef d'écrou de primaire et secondaire Twingo R2
Référence: 7711163856
€186.24Price
Ensure the strength and reliability of your Renault Twingo R2 differential with this official Renault Sport ring gear bolt (sold individually, ref. 7711162367) . An essential element for the maintenance and performance of your transmission. Find associated complementary products at the bottom of the page for complete...
€1.06Price
Boitier Autobloquant Grosse Cannelure Twingo R2
7711167635
€727.54Price
Ensure the survival of your high-performance transmission with RED LINE Heavy ShockProof gear oil in 75W250 grade. Supplied in a 0.946L (1 US Quart) bottle, this oil is the ultimate benchmark for extreme racing conditions.
Trusted by Renault Sport and Sadev for the lubrication of the famous...
€37.16Price
Protect your transmission's integrity with this genuine Renault clutch fork boot . Specifically designed for the Clio 2 RS and Group N competition versions, this sealing gaiter protects your clutch mechanism from road debris and dust. Choose OEM quality to ensure the longevity of your...
€50.98Price
En Stock
€1.39
Price
En Stock
€1.39
Price
Anneau d'arret (circlips de maintien demi coquille commande de boite) Clio 2 RS et Gr N
Aussi appelé Anneau AI17
€1.39Price
Rondelle Plate écrou de cardan D 26x34 8x4.6 Clio Gr N
7703053640
€2.05Price
Don't risk a costly DNF on the track due to a fatigued drivetrain component. This genuine Renault Sport transmission tripod journal (reference 7711150539) is engineered specifically to withstand the extreme torque loads and friction levels of the Formula Renault 2.0 . Suitable for either the left or right driveshaft, it guarantees crisp, direct power delivery...
€169.42Price
Protect the integrity of your Renault Clio 3 RS with this genuine Renault drive shaft boot , specifically designed for the wheel side. Essential for preventing performance loss and costly repairs, it ensures optimal protection for your CV joint , whether mounted on the left or right side. Avoid premature wear and damage caused by impurities on...
€86.59Price
Do not take the risk of damaging your transmission during mechanical overhauls. The genuine SADEV input shaft tightening tool (official part number FOUT1908001 ) is the essential manufacturer tool required to work safely on your ST75-14 sequential gearbox .
Official genuine SADEV factory...
€84.83Price
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Ensure the reliability of your transmission with this complete bearing pack for SADEV sequential gearboxes . Exclusively designed for the Renault Twingo R2 , this kit includes all critical components: primary and secondary shaft bearings , differential bearings , barrel...
€541.03Price
Preserve the integrity of your drivetrain with this genuine SADEV right-hand driveshaft oil seal . Specifically designed for the SADEV gearbox equipped on the Renault Clio 2 V6 Trophy , this seal ensures a perfect interface between the gearbox casing and the right-hand transmission, preventing any lubricant loss...
€20.28Price