SADEV 12-Tooth Secondary Shaft (12/58) F1908058 - ST75 Gearbox

The SADEV 12-Tooth Secondary Shaft: The Risk of Inaccurate Transmission

The secondary shaft, or drive pinion, is the most heavily stressed part of the final drive in your ST75 sequential gearbox. The integrity of this 12-tooth pinion (reference F1908058) is crucial. If you race your Renault Clio 3 Cup with a worn or cracked shaft, you jeopardize the entire transmission. Any defect will cause you to lose the mechanical efficiency and reliability you expect from a SADEV product.

The Inevitable Consequences of a Failing Secondary Shaft:

Catastrophic Failure of the 12/58 Final Drive Ratio

When the teeth of the 12-tooth secondary shaft begin to wear or deform, contact with the 58-tooth crownwheel is no longer uniform. You lose the optimal load distribution, which creates stress peaks and shocks. The most frequent result is tooth rupture, leading to the total destruction of your ST75 gearbox's final drive and the immediate immobilization of your Clio 3 X85 Cup.

Heat Generation and Deterioration of Gearbox Oil

Imperfect meshing due to a degraded secondary shaft generates excessive friction and a critical increase in temperature. You lose the cooling capacity of the gearbox oil, which compromises lubrication and accelerates the wear of all bearings and races within the sequential gearbox. This drastically reduces the lifespan of your competition transmission.

OPTIMIZ ACCESS: Your Source for Genuine SADEV Parts

As a specialized SADEV distributor, OPTIMIZ ACCESS provides you with quality parts essential for servicing sports vehicles. We are based in Hauts-de-France (Lille, Cambrai, Valenciennes) and renowned for our E.E.A.T. expertise in the Renault Sport domain (Clio Cup, Megane N4, Twingo R2).

Frequent Questions for Replacement and SEO Optimization

« Should I replace the 58-tooth crownwheel at the same time as the 12-tooth shaft? »

Yes, it is highly recommended, as part of professional ST75 maintenance, to replace both parts forming the 12/58 final drive ratio simultaneously, even if one appears to be in good condition. Since they have meshed as a pair, a new shaft on an old crownwheel (and vice versa) can reduce reliability.

« What are the necessary complementary parts? »

For assembly, you will need the associated 58-tooth crownwheel and potentially new bearings or fixing screws depending on the condition of your sequential gearbox. These complementary products are listed at the bottom of this product page.

« Can OPTIMIZ ACCESS install my SADEV final drive? »

Absolutely. Our workshops near Arras, Douai, and Saint Quentin are equipped for the assembly, adjustment, and maintenance of the SADEV ST75 gearbox. We guarantee installation according to manufacturer standards, which is essential for competition performance.

Sports Logistics: Stock and Fast Delivery

We understand the urgency of your need for quality parts. Our stock is updated in real-time for fast shipping in France and the export of this genuine SADEV shaft all over the globe.