SADEV Reverse Gear Shaft ST66 Gearbox – Renault Clio 2 Gr N (F0073015)

A Damaged Reverse Gear Shaft = Risk of Catastrophic Misalignment

In your Renault Clio 2 Gr N's ST66 SADEV dog-ring gearbox, the reverse gear shaft (P/N: F0073015) is more than just an intermediate pinion support. It acts as a structural pillar in the casing, ensuring the necessary precise spacing and alignment between the primary and secondary shafts. Using a reverse gear shaft that has suffered impacts or shows signs of wear puts the entire transmission reliability at risk.

The Consequences of a Failing Reverse Gear Shaft

• Kinematic Misalignment: A bent or warped shaft causes poor clearance and misalignment of the shafts and gears. This generates stress and vibrations that rapidly lead to bearing and dog-ring failure.
• Unusable Reverse Gear: Excessive wear on the bearing surfaces or the reverse gear bearing housing can make reverse gear engagement difficult or impossible when you need it most on a stage.
• Premature Gear Wear: If the shaft does not correctly retain the reverse gear pinion, it creates irregular pressure on the teeth, accelerating the wear of the 5th gear wheel and other nearby components.

Genuine SADEV Shaft: Retention Precision and Longevity

The genuine SADEV reverse gear shaft is machined to strict tolerances to guarantee the perfect fit in your ST66 gearbox. Optimiz Access, a specialist in competition mechanics, supplies this crucial part for:

• Renault Clio 2 Gr N (ST66 Gearbox)
• Renault Clio 2 X65 Cup
• Renault Clio 3 X85 Cup
• Renault Megane N4
• Twingo R2

Reliability and Reverse Gear Overhaul Questions

When is it essential to change this shaft?

The replacement of the reverse gear shaft is essential if you notice any trace of impact, deep scratching, or abnormal wear on the bearing surfaces, particularly near the reverse gear bearing housing. This is a measure of maximum caution during a complete gearbox overhaul.

Which parts should be inspected at the same time?

When replacing the shaft, you must check the condition of the reverse gear bearing housing, the shift fork circlip, and the 5th gear wheel (which is integral). These complementary products are available at the bottom of this page.

Our Expertise for Your SADEV Transmission

In addition to supplying quality SADEV parts with fast delivery, our workshop in the Hauts-de-France (near Lille, Seclin) offers professional installation of all components of your competition transmission. Trust our expertise since 2010 for the durability of your Clio Gr N.