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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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Joint de liaison boite cardan gauche Megane N4
€8.88Price
Câble de verrouillage MAR Lg 1560 mm Clio 2 Cup X65
€181.39Price
Bagues de liaison levier tringlerie Clio 2 RS
Livré sans l'écrou présent sur la photo
€10.02Price
Rondelle mince de calage Ø 51 x 40 ép. 0,20
€9.17Price
Do not compromise your 5th gear assembly! This SADEV Anti-Rotation Adjustment Shim (F1903032) is a vital original SADEV part for locking the threaded insert onto the shaft of your SADEV ST66 gearbox.
Its role is to prevent the accidental rotation of the 5th gear...
€3.50Price
Left Differential Sealing Cover SADEV ST66 (F1903055)
Ensure the sealing of your SADEV ST66 gearbox with this genuine SADEV cover. Designed for the Clio Gr N, it accommodates the drive shaft oil seal. Essential to prevent leaks and maintain your transmission's performance.
€201.08Price
Joint torique nitrile Ø 110 x 3 Clio Gr N Référence: 0201057
€2.03Price
Huile de boite NFX bidon de 5L
remplace dès à présent l’huile NFJ et la NFP
Développé pour les boites de vitesse manuelles fortement sollicités
€85.08Price
Bidon de 1L De lubrifiant Boite et Pont Motul Gear LS Lubrifiant Compétition 100% synthèse. Spécialement développé pour les véhicules haute performance et de compétition : Circuit, Rallye, Rallye Raid, Transmission des véhicules électriques… Pour tous ponts hypoïdes avec glissement limité, boîte de vitesses avec différentiel à glissement limité intégré, transmissions mécaniques, boites de...
€19.90Price
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Ensure the critical sealing of your transmission with this genuine Renault gearbox output oil seal . Perfectly suited for the Renault Twingo 2 RS , this seal provides a hermetic barrier between the gearbox and your left or right driveshaft . Don't let an oil leak compromise your gear set:...
€36.77Price
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Protect your transmission’s integrity with this genuine Renault driveshaft oil seal . Specifically designed for the Renault Clio 3 RS , it ensures a perfect seal between the gearbox and the nearside (left) driveshaft . Don't risk a costly mechanical failure: using an original part is the...
€36.77Price
M10 x 20 Hex Head Bolt – SADEV Clio 2 RS Group N
The SADEV hex head bolt M10 x 20, reference F0044009 , is a specially machined fastener listed for the Renault Clio 2 RS Group N equipped with a...
€13.31Price
Flasque support potentiomètre Twingo R2
Référence: 7711163829
€64.20Price
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Roulement de différentiel coté droit Megane 3 RS
€55.55Price
Roulement de différentiel coté gauche Megane 3 RS
€55.55Price
The precision of your SADEV Quickshift gear control depends on every detail! This Mechaninbus pin diameter 2 (P/N: 0701037 ) is an essential part to ensure the reliable retention of the reinforced rod half-shells on your Renault Clio 2 Gr N ( ST66 SADEV Gearbox). A faulty pin results in...
€0.24Price
Do not risk a spongy clutch pedal at the end of a hard track day session, grinding gear engagements at high RPM, or a complete failure of your hydraulic line under heavy acceleration. The premium HEL Performance stainless steel braided aviation clutch line for the Renault Megane 2...
€56.99Price
Butée basse pédale embrayage Megane N4 Référence: 7711167574
€52.37Price
Joint torique nitrile Ø 106 x 2,5 # pour ST75 14
Référence: 0201061
€2.40Price
Joint double lèvres sortie de cardan Twingo R2
Joint identique pour le coté gauche et droit
€21.77Price
MOTUL Multi DCTF is a Technosynthese® transmission fluid specially developed for dual-clutch transmissions (DCT) , including both wet and dry clutch systems. It is designed to provide suitable lubrication and protection for compatible dual-clutch gearboxes.
Using the correct DCT transmission fluid is essential to maintain the proper...
€16.00Price
Joint axe de commande et levier passage Clio 3 RS
€10.45Price
A vital part for the precision of your Quickshift ! This SADEV left half-ball joint (P/N: F0073023 ), or half-shell , is essential for maintaining zero-play on the shift linkage rod in the casing of your Renault Clio 2 Gr N's ST66 dog-ring gearbox . If this wear part shows any play, you will...
€32.75Price
Ensure a zero-play gear control system! This SADEV right half-ball joint (P/N: F0073024 ), or half-shell , is crucial for the precise retention and fluid pivoting of the shift linkage rod in the casing of your Renault Clio 2 Gr N's ST66 dog-ring gearbox . Wear on this part introduces detrimental...
€32.75Price
Ensure your instrumentation remains accurate with this genuine Renault 19-tooth speedometer drive gear . Essential for the JC5 gearbox and Sadev ST66 dog-engagement transmissions, this manufacturer-certified part guarantees reliable data feedback for your Renault Clio 2 RS or Group...
€10.67Price
Don't let a worn or loose axle nut compromise the power delivery and safety of your Twingo RS , Twingo R1 , or Clio 2 RS . This genuine OEM axle nut is the essential replacement part to reliably secure your ground link and guarantee perfect transmission maintenance. By keeping an original part that...
€14.74Price
Roulement avant Clio 3 RS - Megane 3 RS - Megane 4 RS
€304.88Price
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