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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: Wheel, Gears, Fork
Renvoi de marche arrière 12-19 Twingo R2
Référence: 7711163848
€107.35Price
Cage à aiguilles renvoi de MAR Twingo R2
Référence: 7711162288
€18.74Price
Baladeur simple femelle Megane N4
Référence: 7711167437
€138.06Price
Support baladeur simple Megane N4
Référence: 7711167430
€152.06Price
Entretoise arbre secondaire Megane N4
Référence: 7711167435 - F1914215
€198.35Price
Doigt de commande assemblé Megane 3 RS et N4
€49.85Price
Support inverseur assemblé Megane 3 RS et N4
€84.71Price
Bague intérieure de roulement d'arbre d'embrayage Megane N4
€98.48Price
Anneau synchroniseur sup Clio 2 RS (avec nouveau baladeur 1/2) et Twingo RS
€34.00Price
Limited-Slip Differential Planetary Gear SADEV ST66 (F1501064)
Optimize the traction of your Renault Clio Gr N with this genuine Renault Sport limited-slip differential planetary gear. Designed for the SADEV ST66 gearbox, it ensures optimal torque distribution and improves grip when exiting corners. Essential for maximum performance in competition. ...
€193.52Price
Carter embrayage boite JR5
Carter ayant été démonté d'une boite neuve, la boite n'a jamais été accouplée à un moteur.
€544.75Price
Assembled 3/4/5/6 Gear Fork - TL4 Gearbox Renault Clio 3 RS (Genuine Renault)
Optimize the gear shifting of your Renault Clio 3 RS with this genuine Renault fork for TL4 gearbox. Designed for optimal precision and reliability, this part ensures smooth and fast gear changes. Warning: different assemblies exist, contact us for verification. ...
€142.93Price
Anneau synchroniseur 3/4/5 Twingo RS et R1 et Clio 2 RS
€43.97Price
Synchroniseur de 1ère/2ème boite TL4 Clio 3 RS 2 kits sont nécessaires pour faire une boite
€77.95Price
Don't let a stubborn gear change cost you the win. This reworked 3-4 selector rail is an official Renault Sport competition part, manufactured by SADEV for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor of SADEV parts, Optimiz Access ...
€113.74Price
Do not let a stubborn reverse gear engagement ruin your maneuvers in the service park or during a recovery. This reverse gear bushing is an official Renault Sport part, engineered by the expert SADEV under reference F0056015 . Exclusively designed for the ST66 gearbox of the Renault Clio 2 Group...
€29.15Price
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€260.66
Price
En Stock
€260.66
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Do not compromise the precision and reliability of your gearbox!
This SADEV 5th Gear Selector Shaft (Reference F1903074 / F19030291) is an absolutely essential original SADEV part for the SADEV ST66 gearbox fitted to your Renault Clio 2...
€260.66Price
Ensure precise and fast 5th gear changes on your Renault Clio 2 Gr N ! This machined 5th gear shift fork SADEV (P/N: F0022025 ) is an essential component to guarantee perfect engagement of 5th gear in your ST66 dog-ring gearbox . A worn fork causes dangerous play in the selection and compromises...
€467.78Price
Axe de selection Assemblé renforcé Megane N4
Référence: 7711167136
€523.57Price
Machined 1-2 Gear Fork SADEV ST66 (F02027022)
Optimize the gear changes of your SADEV ST66 gearbox with this machined 1-2 gear fork from Renault Sport. Designed for the Clio Gr N, it ensures increased precision and reactivity. Essential for maintaining your transmission's performance.
€655.20Price
3rd and 4th gears are the most critical ratios in racing. This machined 3rd-4th gear shift fork SADEV (P/N: F0027026 ) is essential for guaranteeing precise and rapid shifts on your ST66 dog-ring gearbox in the Renault Clio 2 Gr N . A fatigued or deformed fork causes a major risk of unintentional disengagement ...
€244.60Price
Genuine Renault 5th Gear Idler Gear (TL4 Gearbox Clio 3 RS) - Ensure the optimal performance of your gearbox with this original Renault part, offered at an advantageous price. Discover related products at the bottom of the page.
€155.50Price
Restore the exact gear ratio and longevity of your Renault Clio 3 RS 's TL4 gearbox . This 6th gear fixed gear (30 teeth) is an essential genuine Renault part for the proper functioning and reliability of the top gear. Replacing it with a new part guarantees the absence of noise and maintains the mechanical precision of your sport transmission .
€185.60Price
Pignon fou de 2ème boite TL4 Clio 3 RS
Pignon de 37 dents, merci de vérifier votre montage car plusieurs montages existent
€77.52Price
A key component of your Renault Clio 3 RS 's TL4 gearbox , this 1st gear layshaft gear with 35 teeth is a new genuine Renault part . Essential for a reliable repair, it resolves problems with gears jumping out or abnormal noises when engaging first gear. Don't compromise your transmission's reliability by choosing a used or non-compliant part.
€81.64Price
The 5th gear is critical for your maximum performance! This 5th speed slider (Ref. F1903013 ) from SADEV is an original racing part , essential for the reliability of the ST66...
€138.70Price
Collection anneau de synchro 1-2 (nouveau modele)
€59.98Price
Restore smooth gear shifting with this genuine Renault 1st/2nd gear hub slider kit . Specifically designed for the TL4 gearbox found in the Renault Clio 3 RS , this complete kit is the official solution to eliminate gear grinding and crunching.
Complete kit: hub slider ,...
€271.20Price