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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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Entretoise plastique pour selecteur Megane 3 RS
€0.46Price
Do not risk a catastrophic transmission fluid leak, sudden failure of your left-hand inner CV joint tripod, or the highly expensive replacement of a complete genuine Renault Sport driveshaft assembly. The Kit soufflet de transmission cardan gauche coté boite Megane 3 RS et...
€85.96Price
Maximize your braking system's reliability with this brake fluid separation kit for hydraulic release bearings . Designed to isolate the clutch circuit from the main braking circuit, this upgrade is essential for sports vehicles pushed to the limit on the...
€46.67Price
Raccord coudé Formule Renault 2.0
Référence: 7705030272
€33.85Price
Secure your front suspension with this set of 4 genuine Renault front wheel bearing mounting bolts . Specifically designed for the Renault Megane 2 RS , Clio 3 RS , Megane 3 RS , and Megane 4 RS , this kit is essential to guarantee the perfect fitment of your wheel hub.
...
€39.80Price
Genuine Renault Ball Joint Bushings (pair of half-shells) for Clio 2 RS and Clio Gr N. Ensure the mobility and precision of your gear shift with these authentic parts.
Also discover our retaining circlips and reinforced bushings for optimal performance.
€5.93Price
Original RENAULT driveshaft nut compatible with the Renault Megane 2 RS and Renault Clio 3 RS . An essential safety element for your transmissions. Discover related complementary products below.
€17.27Price
Magnetic Drain Plug 16x1.5 (7711156704)
Protect your engine with this genuine Renault Sport magnetic drain plug. Its 16x1.5 thread pitch is compatible with many models. It captures metal particles for cleaner oil and better engine longevity. Essential for optimal maintenance.
€34.57Price
Don't let a simple failure compromise the driving precision of your Clio 2 RS . This right-hand driveshaft oil seal (joint spi) is a genuine RENAULT original part , guaranteeing renewed **reliability and performance**. Essential for the sealing of your gearbox, it maintains the oil level and protects your...
€26.29Price
Never underestimate the importance of small parts! This SADEV reverse gear shift fork circlip (P/N: 0601002 ) is an essential safety component for your ST66 dog-ring gearbox in the Renault Clio 2 Gr N . It ensures the precise retention of the reverse gear shift fork , preventing any misalignment or jamming....
€1.44Price
Do not risk missed gear shifts, erratic ignition cut-offs, or costly dog-ring damage on your sequential transmission. The genuine SADEV STDSA gear position sensor (OEM reference F0089033 ) is the precision electronic sensor required to accurately detect...
€289.28Price
Sur commande ou en cours de réappro
€16.80
Price
Sur commande ou en cours de réappro
€16.80
Price
Do not risk a fatal bearing displacement at the heart of your racing transmission. This official Renault Sport SB120 retaining clip (Manufacturer Part Number: 7711162216 ) is the only certified snap ring designed to securely lock the differential...
€16.80Price
Sur commande ou en cours de réappro
€36.60
Price
Sur commande ou en cours de réappro
€36.60
Price
Do not risk incorrect mechanical play that would prematurely destroy your racing transmission. This official Renault Sport differential shimming washer (Manufacturer Part Number: 7711162220 ), sold individually , is the essential genuine...
€36.60Price
Sur commande ou en cours de réappro
€1.62
Price
Sur commande ou en cours de réappro
€1.62
Price
Secure your SADEV ST75 sequential gearbox assembly with this genuine Renault Sport M10x50 CHC screw (Reference: 7711064819 ). Specifically engineered for engine-to-gearbox coupling on competition chassis, it guarantees the essential structural strength required under extreme mechanical stress. Sold individually; two units are...
€1.62Price
Sur commande ou en cours de réappro
€110.35
Price
Sur commande ou en cours de réappro
€110.35
Price
Do not let a simple tear immobilize your sports car or destroy your transmission. This right-hand inner driveshaft boot (gearbox side) is a genuine Renault (OEM) part , specifically designed to withstand the thermal and mechanical stresses of the Renault Clio 4 RS . Choosing manufacturer quality over aftermarket parts ensures a perfect seal...
€110.35Price
Sur commande ou en cours de réappro
€420.00
Price
Sur commande ou en cours de réappro
€420.00
Price
The SADEV Swing Arm Bracket Reinforcement (F0073025) is an essential structural part designed to prevent cracking of the mechanical casing of your SADEV ST66 gearbox on the Renault Clio 2 Group N .
This original SADEV reinforcement increases the...
€420.00Price
Sur commande ou en cours de réappro
€93.49
Price
Sur commande ou en cours de réappro
€93.49
Price
Don't let wear and tear on your SADEV ST75 sequential gearbox hinder the performance of your Renault Clio 3 X85 Cup . This comprehensive revision kit contains all essential O-rings , oil seals , compression springs , and indexing springs to restore the reliability and precision of your transmission. Don't wait...
€93.49Price
Sur commande ou en cours de réappro
€207.47
Price
Sur commande ou en cours de réappro
€207.47
Price
Genuine Renault Gearbox Shaft Bearing + Retaining Plate Kit for Clio 4 RS EDC
Optimize the reliability and longevity of the EDC transmission in your Renault Clio 4 RS with this genuine Renault gearbox shaft bearing and retaining plate kit . An essential set for optimal support of the transmission shafts. Discover other gearbox...
€207.47Price
Sur commande ou en cours de réappro
€8.54
Price
Sur commande ou en cours de réappro
€8.54
Price
Genuine Renault Differential Tripod Retaining Ring (Circlip) for JC5 and JB3 gearboxes. Compatible with Renault Clio 2 RS, Clio 16S, Clio Williams. Ensure the longevity of your transmission with this quality part.
€8.54Price
Sur commande ou en cours de réappro
€85.09
Price
Sur commande ou en cours de réappro
€85.09
Price
Don't risk excessive end play on your transmission shafts or premature gear wear during a gearbox overhaul. This genuine Renault retaining snap ring kit for TL4 manual gearboxes allows millimeter-precise shaft end-play adjustment on your Renault Clio 3...
€85.09Price
Sur commande ou en cours de réappro
€196.99
Price
Sur commande ou en cours de réappro
€196.99
Price
Do not risk premature clutch failure in competition . Without a SADEV clutch guide tube (Ref. F0073019 ) in perfect condition, you lose the precise guidance necessary for the clutch release bearing , leading to a risk of slipping or blocking on your Clio 2 X65...
€196.99Price
Restore precise and smooth clutch engagement on your legendary Renault Clio Williams with this genuine Renault clutch cable . Essential for fluid gear changes and the longevity of your gearbox, this cable guarantees reliability and pedal feel that meet factory standards. Don't let a stiff pedal or sloppy travel ruin your driving pleasure.
€94.79Price
The Renault Sport Clutch Circuit Bleed Hydraulic Hose (ref. 7711167173) is an official RENAULT SPORT part designed for the Renault Megane N4 . It allows for easy and efficient bleeding of the clutch circuit, ensuring optimal performance. Optimiz Access is the official distributor of this part.
€60.64Price
TL4 secondary shaft oil deflector , an original Renault component designed for the Renault Clio 3 RS 2.0 16V . This internal transmission component contributes to proper oil management around the secondary shaft and to the correct operation of the gearbox lubrication system.
A damaged, deformed or missing oil deflector can compromise the intended...
€0.94Price
Sur commande ou en cours de réappro
€187.96
Price
Sur commande ou en cours de réappro
€187.96
Price
Original Renault Megane 3 RS Clutch Master Cylinder
Original Renault part, for optimal performance of your Megane 3 RS. Discover complementary products at the bottom of the page for complete customization.
€187.96Price
Don't let a worn dual-mass flywheel harm the balance and responsiveness of your Clio 3 RS . This single-mass flywheel is the ideal technical solution to reliably secure your powertrain and improve your F4R engine's rev response. By keeping an original part that is often at its end-of-life on these generations,...
€331.39Price
Sur commande ou en cours de réappro
€19.57
Price
Sur commande ou en cours de réappro
€19.57
Price
Secure your transmission gear stack assembly and maintain absolute shaft pretension with this genuine M18 x 150 Input Shaft Nut (Right-Hand Thread) for the Renault Clio Group N , commercialized under part number F1903212 . This high-tensile locking fastener is...
€19.57Price
Sur commande ou en cours de réappro
€0.00
Price
Sur commande ou en cours de réappro
€0.00
Price
Sur commande ou en cours de réappro
€1,542.64
Price
Sur commande ou en cours de réappro
€1,542.64
Price
Volant Moteur bi masse origine Megane 4 RS boite méca
€1,542.64Price
Sur commande ou en cours de réappro
€361.33
Price
Sur commande ou en cours de réappro
€361.33
Price
Prevent gear crunching under heavy deceleration, gear pop-outs during aggressive special rally stages, and premature wear on your transmission shafts. The high-performance Gearbox Overhaul Rebuild Kit for Clio Group N (Commercial Reference: KITREVST66JCGN1) aggregates all...
€361.33Price
Sur commande ou en cours de réappro
€69.92
Price
Sur commande ou en cours de réappro
€69.92
Price
Gear Shift Sensor (Cut-Off Switch) SADEV Renault Sport (Ref: 7711162256 & 1100077119)
Ensure fast and precise gear changes on your SADEV sequential gearbox of your Renault Twingo R2 , Renault Clio R3 , or Renault Clio 3 X85 Cup with this official Renault Sport gear shift sensor (cut-off...
€69.92Price
Graisse de cardan Haute Température Clio Gr N Référence: 7711127025
€24.84Price