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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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Circlips intérieur Ø105 Seeger Clio 4 X98 Cup
Référence 0100602076
€2.92Price
Sur commande ou en cours de réappro
€110.35
Price
Sur commande ou en cours de réappro
€110.35
Price
Kit soufflet de transmission coté roue Megane 2 RS
Véritable produit d'origine
€110.35Price
Ressort de rappel de commande Twingo R2
Référence: 0100801027
€15.90Price
Sur commande ou en cours de réappro
€2.59
Price
Sur commande ou en cours de réappro
€2.59
Price
- New
- New
Do not let a worn, deformed or unsuitable O-ring cause a leak in your competition vehicle's transmission. The SADEV nitrile O-ring 32.2 x 3 mm (Part Number: 0201005C) is designed for sealing applications on the transmission of the Renault Clio 2 V6...
€2.59Price
Sur commande ou en cours de réappro
€9.50
Price
Sur commande ou en cours de réappro
€9.50
Price
raccord male / male flexible butée / purgeur Clio 3 RS, R3, X85 Cup
€9.50Price
Sur commande ou en cours de réappro
€144.71
Price
Sur commande ou en cours de réappro
€144.71
Price
An essential part for movement inversion! This SADEV Reverse Gear Idler Pinion, 25 teeth (P/N: F1903005 ) is a crucial intermediate gear for engaging reverse gear in your Renault Clio 2 Gr N's ST66 dog-ring gearbox . Damaged teeth on this idler (characterized by 11 / 25 / 36 teeth) result in noisy , or even impossible,...
€144.71Price
Sur commande ou en cours de réappro
€4.92
Price
Sur commande ou en cours de réappro
€4.92
Price
Entretoise Ø6 lg:26mm câble embrayage Clio 2 Cup X65
Référence : 7711155323
€4.92Price
Sur commande ou en cours de réappro
€115.82
Price
Sur commande ou en cours de réappro
€115.82
Price
Do not compromise the precision of your 3-4 shifts! This 3-4 slider support (Ref. F1903016 ) from SADEV is a critical component for the ST66 sequential gearbox in your...
€115.82Price
Right-Hand Driveshaft Boot – Renault Clio 2 RS Phase 2
The right-hand driveshaft boot on the bearing support side is designed to protect the driveshaft joint on compatible Renault Clio 2 RS Phase 2 models. It helps retain lubricating grease and prevent dirt and moisture from entering the joint, supporting reliable drivetrain...
€56.05Price
Soufflet côté roue Twingo R2 Référence: 7711162994
Produit remplacé par Soufflet coté BV
€13.72Price
Sur commande ou en cours de réappro
€82.49
Price
Sur commande ou en cours de réappro
€82.49
Price
1st Gear Wheel Shoulder Ring SADEV ST66 (F1903019)
Ensure the precision and reliability of your 1st gear with this genuine Renault Sport 1st gear wheel shoulder ring. Designed for the Clio Gr N's SADEV ST66 gearbox, it optimizes your transmission's operation. Essential for maintaining consistent performance in competition.
€82.49Price
Joint Bouchon vidange Ø18x24x1 Megane N4
Référence: 7711167083
€1.16Price
Bague de roulement petites cannelures Twingo R2
Référence: 7711163827
€272.72Price
Module Commande Passage de Vitesse Megane 2 RS
Véritable produit d'origine Renault
Fourni avec la vis et son joint
€211.46Price
Sur commande ou en cours de réappro
€11.89
Price
Sur commande ou en cours de réappro
€11.89
Price
- New
- New
Avoid oil leaks around your transmission with the SADEV 45x62x10 double lip oil seal , reference 0205011C . This sealing component is designed for the Renault Clio 2 V6 Trophy equipped with a SADEV transmission.
With...
€11.89Price
- New
- New
Avoid oil leaks and loss of sealing on your SADEV gearbox with this nitrile O-ring Ø41.2 x 3 mm , sold under reference 0201027C . This sealing component is intended for the Renault Clio 2 V6 Trophy and is suitable for the...
€2.63Price
Sur commande ou en cours de réappro
€2.51
Price
Sur commande ou en cours de réappro
€2.51
Price
- New
- New
Avoid the risk of oil leaks and loss of sealing on your competition transmission with the SADEV nitrile O-ring 82 x 3 mm , reference 0201028C , designed for the Renault Clio 2 V6 Trophy .
This SADEV sealing...
€2.51Price
Kit de fabrication française permettant de rendre de nouveau etanche les boites JC5 / JB3 au niveau de la tringlerie.
Notice Fournie
€32.52Price
Sur commande ou en cours de réappro
€3.16
Price
Sur commande ou en cours de réappro
€3.16
Price
- New
- New
Do not risk oil leakage from your sequential gearbox during intensive track sessions. The SADEV original fill plug seal (Part Number: 5002017C) is designed for the Renault Clio 2 V6 Trophy and helps maintain proper sealing around the gearbox...
€3.16Price
Sur commande ou en cours de réappro
€1.78
Price
Sur commande ou en cours de réappro
€1.78
Price
Ensure your drivetrain's integrity with this genuine Renault Sport M10x70 CHC screw (Reference: 7711064285 ). Specifically calibrated for SADEV ST75 sequential gearbox assembly, it provides optimal structural anchoring into the engine block. This critical component is sold individually; only one unit is required to finalize...
€1.78Price
Sur commande ou en cours de réappro
€7.97
Price
Sur commande ou en cours de réappro
€7.97
Price
Protect your Renault Clio 2 RS gearbox with the genuine Renault secondary shaft oil deflector . This essential part ensures optimal lubrication and prevents oil leaks, guaranteeing the longevity and performance of your transmission. Crucial for maintaining your gearbox's integrity, this OEM component helps you avoid costly and unexpected repairs.
€7.97Price
Sur commande ou en cours de réappro
€101.08
€336.92
Regular price
-70% off
Price
Sur commande ou en cours de réappro
€101.08
€336.92
Regular price
-70% off
Price
Don't let excessive slipping ruin the driving pleasure of your Renault Twingo 2 RS . This Genuine Renault Clutch Disc (also known as a clutch friction plate ) is the essential manufacturer part to ensure perfect power delivery to the ground without the risks associated with low-quality aftermarket...
€101.08€336.92Regular price-70% offPrice
Sur commande ou en cours de réappro
€151.32
Price
Sur commande ou en cours de réappro
€151.32
Price
A key element of the gearbox ratio ! This SADEV 4th gear pinion, 23 teeth (P/N: F1903003 ), mates with the 26-tooth 4th gear wheel to provide the specific 4th gear ratio for your Renault Clio 2 Gr N's ST66 dog-ring gearbox . Wear on the teeth or damage to the dog rings of this pinion results in difficult...
€151.32Price
Sur commande ou en cours de réappro
€21.95
Price
Sur commande ou en cours de réappro
€21.95
Price
Sur commande ou en cours de réappro
€84.01
Price
Sur commande ou en cours de réappro
€84.01
Price
- Pack
Carter embrayage Boite Crabot Clio Gr N 7711129471
€505.25Price
Sur commande ou en cours de réappro
€39.78
Price
Sur commande ou en cours de réappro
€39.78
Price
Raccord (connecteur) butée Clio 3 RS et Megane 2 RS
€39.78Price
Sur commande ou en cours de réappro
€55.24
Price
Sur commande ou en cours de réappro
€55.24
Price
Sur commande ou en cours de réappro
€5.78
Price
Sur commande ou en cours de réappro
€5.78
Price
Boite de vitesse echange standard TL4 Clio 3 RS
BVM TL4-S-20
vendu avec le recepteur d'embrayage (butée hydraulique)
Une consigne de 370.20€ttc vous sera remboursé à reception de votre ancienne boite de vitesse (sous conditions : boite vitesse complète et non démontée , carters de boite pas cassés).
€2,604.19Price
Sur commande ou en cours de réappro
€784.37
Price
Sur commande ou en cours de réappro
€784.37
Price
1st-2nd Gear Ratio (12/34 17/36) SADEV ST75-14 (4475900101)
Optimize the performance of your Renault Clio 2 X65 Cup with this genuine Renault Sport 1st-2nd gear ratio (12/34 17/36), manufactured by SADEV. Designed for the ST75-14 sequential gearbox, it ensures precise and efficient gear changes. Essential for maximum competitiveness.
€784.37Price