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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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Biellette de boite de vitesse Clio 2 RS et Gr N. Véritable pièce d'origine
€67.75Price
Prevent low-frequency cabin droning, structural wheel hub play, and the degradation of your steering accuracy under heavy cornering loads. The heavy-duty Front Wheel Hub Bearing for Clio 3 RS, Megane 3 RS, and Megane 4 RS secures the structural alignment of your front axle...
€123.42Price
Pignon fou de 2ème boite TL4 Clio 3 RS
Pignon de 37 dents, merci de vérifier votre montage car plusieurs montages existent
€77.52Price
Don't let a worn or noisy differential impact the traction and safety of your Renault Clio 3 RS . This genuine Renault assembled differential housing includes the differential, the 69-tooth crown wheel, and the crown wheel bolts, ensuring a reliable replacement that meets manufacturer specifications. You can also find the associated differential...
€404.56Price
Entretoise conique de barre de liaison Clio 2 X65 Cup
Référence: SAF9001049
€5.75Price
Jeu de rondelles de commande Megane N4
Référence: 7711167467
€20.74Price
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
Douille de barre de liaison Clio 2 X65 Cup
Référence: SAF9001048
€9.88Price
Satellite d'autobloquant avant Twingo R2
Référence: 7711163821
€78.67Price
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
Contacteur début course embrayage Megane 3 RS et N4
Compatible également Trafic 3, Kangoo 2, Master 3, Laguna 3
Référence: 253250005R
€19.40Price
En Stock
€288.46
Price
En Stock
€288.46
Price
An essential competition part, the Sadev F1903051 Limited Slip Differential Cover is designed to ensure perfect sealing and protection for the differential of your Renault Clio 2 Gr N ( Sadev ST66 gearbox). A failure of this component could compromise the entire...
€288.46Price
Axe de pivot de levier de vitesse Clio 2 Cup X65
Référence : 7711155305
€18.47Price
Centreur boite de vitesse et pompe à huile
Nous contacter en cas de doute sur la compatibilité avec votre véhicule
Référence: 8200582334
€15.43Price
The Tripod Driveshaft Clio Group N , references A-7711129526 and is a reinforced tripod driveshaft component designed for Renault Clio Group N competition applications. Developed for demanding motorsport use, this component is intended for vehicles subjected to increased drivetrain loads during rally and track use.
A...
€73.82Price
Flanc de levier de vitesse Clio 2 Cup X65
Référence : 7711155303
€49.30Price
Optimize the performance of your Clio 3 RS with the genuine Renault differential bearing on the large driveshaft side!
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€55.55Price
Do not let a failing transmission ground your sports car. Since the original manufacturer part is now discontinued, we have selected this high-quality re-manufactured left drive shaft (transmission) for Renault Megane 2 RS . Engineered to handle the torque of the F4RT engine, this brand new drive shaft perfectly replaces your worn component, eliminating...
€192.10Price
Roulement différentiel côté petit cardan Boite TL4 Clio 3 RS
€37.96Price
Cables commande de vitesses Megane 3 RS Véritable produit d'origine
€239.46Price
Support pommeau Levier de vitesse Clio 2 Cup X65
Référence : 7711155300
€187.78Price
Roulement arbre secondaire côté 6ème Boite TL4 Clio 3 RS
€32.11Price
Frete épaisseur 12 transmission Twingo R2
Référence: 7711162703
€29.42Price
The SADEV Left Driveshaft (references F1908352 / 7711160447 ) is the main element of the left driveshaft, ensuring the link between the Lobro joint (gearbox side) and the wheel hub carrier . Designed to withstand intense torque efforts in motorsport , it is homologated for the Renault...
€450.43Price
Roulement de différentiel coté droit Megane 3 RS
€55.55Price
Flexible / Durite aviation conduite embrayage Clio 3 RS
Se monte apres ce produit et non directement sur l'emetteur
Conduite sortie emetteur Clio 3 RS
Coté butée, prévoir le raccord visible dans les produits associés ci dessous
€49.99Price
Roulement de différentiel coté gauche Megane 3 RS
€55.55Price
Original RENAULT secondary shaft bearing (clutch side) for TL4 type gearboxes fitted to Renault Clio 3 RS vehicles. An essential part for the proper functioning of your transmission. Discover other gearbox bearings in the related products section at the bottom of the page.
€60.40Price
Filtre à huile de boite Megane N4
Référence: 7711158459
€37.03Price
Secure your suspension precision with this high-performance Left-Hand Thread Uniball Joint , part number 7711156408 . Essential for Rally configurations, it is specifically used on the Renault Clio R3 and Renault Twingo R2 . Do not let minor mechanical play compromise your stage...
€87.13Price
Collection anneau de synchro 1-2 (nouveau modele)
€59.98Price
Huile de boite de vitesse Total Fluidmatic DCT MV Clio 4 RS
Bidon de 1L
€14.99Price
Ensure your transmission's longevity with this genuine Renault needle cage for the 6th speed gear . Specifically designed for the TL4 gearbox of your Clio 3 RS , this essential engine component prevents whining noises and premature failure. Do not risk your gearbox integrity with...
€10.49Price
Preserve the Precision of Your JC5 Gearbox
Don't let a worn gearbox control shaft boot impact the quality of gear changes in your Renault Clio 2 RS or Renault Clio Gr N . This genuine Renault JC5 gearbox control shaft boot , referenced under number 7700104811 , is essential for protecting the control mechanism....
€16.26Price
1.20 Belleville Washer SADEV ST66 (F0085914)
Precisely adjust the locking differential preload with this genuine Renault Sport 1.20 Belleville washer, manufactured by SADEV. Designed for the Renault Clio 2 Gr N equipped with the ST66 gearbox, it ensures optimal preload. Essential for maximum performance in competition.
€64.43Price
Do not risk a persistent transmission whine, severe internal gear mesh destruction, or a catastrophic input shaft snap under heavy loads. The premium Roulement arbre primaire côté 6ème boite TL4 Clio 3 RS is the critical factory-spec replacement bearing required to restore...
€29.71Price
Transform your sports car's engine character with this TTV Racing lightweight flywheel . Specifically designed for the Renault Clio 2 RS (172 and 182), this high-performance steel flywheel weighs in at just 3.3 kgs , offering a drastic reduction in rotational mass compared to the original for lightning-fast...
€449.00Price
Vis extremité arbre secondaire HM 10x100 LG27 CL11 Clio 2 RS et Gr N
€10.61Price
Roulement arbre primaire côté embrayage boite TL4 Clio 3 RS
€28.99Price
Support commande BV sur colonne Twingo R2 7711162755
€227.11Price
Vis ext M8x43 fixation carter méca sur carter embrayage Clio 2 RS et Gr N
€2.52Price
Couvercle autobloquant équipé Megane N4
Référence; 7711167442
€269.30Price