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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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Do not compromise the axial adjustment of your SADEV ST66 gearbox ! This countershaft shim (Ref. F1903028 ) is an essential SADEV brand part to ensure mounting...
€26.60Price
Ensure the absolute reliability of your gearshift system with this Genuine Renault Sport Lever Pin on Sleeve for the Clio 3 Cup X85 . This specific component (reference 7711160152 ) is essential for maintaining surgical precision during gear...
€101.03Price
Fourreau aluminium colonne de direction Clio 3 X85 Cup
Référence: 7711160153
€176.71Price
Do not let an approximate transmission compromise your stage times. This 56-tooth crown wheel for 11-tooth shafts is an official Renault Sport component, engineered by SADEV specifically for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor of SADEV parts for the Renault...
€820.75Price
Entretoise de fixation de levier Clio 3 X85 Cup
Référence: 7711156164
€19.02Price
Arbre Secondaire 11 dents (pour couronne 56 dents) Clio Gr N Référence: 7711129543
€1,004.35Price
Couple 12X53 - petites canelures Twingo R2
Référence: 7711162863
€1,767.94Price
Do not risk a mechanical failure and retirement during your next stage. This 56-tooth crown wheel for 12-tooth shafts is an official Renault Sport competition part, engineered by the experts at SADEV for the Renault Clio 2 Group N equipped with the ST66 gearbox . As the exclusive distributor ...
€758.77Price
Do not risk an oil leak or a complete transmission failure due to neglected hardware. This M8x20 CHC bolt (Grade 10.9, raw finish) is an official Renault Sport component, manufactured by SADEV . Specifically designed for securing the differential cover on the ST66 gearbox of the Renault Clio 2...
€0.79Price
Avoid transmission issues caused by a worn or deformed retaining ring during maintenance of your competition vehicle. The Ø40 external circlip for Clio Group N , sold under reference 0601010 , is intended for Renault Clio 2 Group N ...
€2.26Price
Couple 12X57 court - grosses cannelures Twingo R2 Référence: 7711167609
€1,746.37Price
Optimize your transmission's top speed with the 12X53 Long Final Drive (large splines) specifically developed for the Twingo R2 . This crown wheel and pinion set, available under reference 7711167608 , is the ideal solution to adapt your final...
€1,810.32Price
Don't let poor gear ratios ruin your stage times. This official 52-tooth crown wheel , manufactured by SADEV for Renault Sport , is the key component for your 11/52 final drive . Specifically designed for the Renault Clio 2 Gr.N equipped with the ST66 gearbox , it...
€565.21Price
Arbre secondaire 12 dents (pour couronne 63 dts) Clio Gr N 7711129473
€1,017.37Price
En Stock
€41.45
Price
En Stock
€41.45
Price
Véritable biellette quickshift permettant de reduire le mouvement lors du passage des vitesses.
Pieces compatibles avec les super 5 Gt Turbo, Clio 16s et Williams et Clio 2 RS
Véritable piece officielle historique
Montage Rapide en lieu et place
€41.45Price
Do not let a fragile transmission compromise your rally performance. This 11-tooth secondary shaft , specifically designed to mate with a 52-tooth crown wheel , is an official Renault Sport competition part manufactured by SADEV . Destined for the ST66 gearbox of the Renault Clio 2 Group N ,...
€1,075.99Price
Couronne 63 dents ( 12 / 63 ) équipée Clio Gr N Référence: F19030231
€898.58Price
En Stock
€988.36
Price
En Stock
€988.36
Price
The SADEV 12-Tooth Secondary Shaft (7711129468 / F19030201) is a core component of your SADEV ST66 gearbox. This original SADEV part ensures the vital connection to the differential via the 58-tooth crown wheel for the specific 12x58 final drive .
The replacement of a damaged...
€988.36Price
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
Pochette revision changement de couple Clio R3
Référence: 7711163710
€370.03Price
Sur commande ou en cours de réappro
€1,615.82
Price
Sur commande ou en cours de réappro
€1,615.82
Price
Sur commande ou en cours de réappro
€499.00
Price
Sur commande ou en cours de réappro
€499.00
Price
Levier de vitesse de grande qualité qui est rallongé et permet donc d'avoir le pommeau plus pres du volant. Malgré sa grande hauteur, le debattement est reduit et vous permettra de realiser un geste plus court et donc plus rapide pour passer les vitesses Il est livré complet du pommeau jusqu'aux demi coquilles qui viennent se fixer sur la boite Produit monté sur rotule Hauteur: 45 cm
€499.00Price
Levier de Vitesse CAE RACING BMW E30 E36 E46
€1,052.54Price
Do not risk a missed gear engagement during intense track day sessions, a prolonged clutch-in time that vents your turbocharger boost pressure, or a vague, spongy factory shifter linkage that compromises sport driving. The premium Short Shift 4H-TECH FOR Megane 3 RS (Catalog...
€184.14Price
Optimize your Renault Clio R3 's handling by replacing this essential SADEV Belleville washer for precise differential preload adjustment in your sequential gearbox . Don't let inaccurate preload compromise your competition vehicle's traction.
€94.62Price
Sur commande ou en cours de réappro
€559.00
Price
Sur commande ou en cours de réappro
€559.00
Price
Radically transform your driving experience with the Pure Motorsport Racing Gear Shifter for Renault Clio 2 RS . This high-end shifter system eliminates all vagueness in the gear selection to offer ultra-precise, firm, and fast gear changes—essential for...
€559.00Price
Couple Court 11x47 Clio R3
Véritable produit Renault sport pour Boite Sadev
€3,421.76Price
Restore the original precision of your gearshift mechanism with this genuine Renault gear lever housing . Specifically engineered for the Clio 2 RS , this critical component ensures smooth gear changes and eliminates excessive play, essential for a safe and high-performance sporty driving experience. ...
€155.87Price
Sur commande ou en cours de réappro
€130.50
Price
Sur commande ou en cours de réappro
€130.50
Price
Biellette de boite de vitesse Clio 2 RS et Gr N. Véritable pièce d'origine
€67.75Price
Sur commande ou en cours de réappro
€511.91
Price
Sur commande ou en cours de réappro
€511.91
Price
