SADEV Reverse Idler Pinion 25 Teeth ST66 Gearbox – Clio 2 Gr N (F1903005)

A Defective Reverse Idler Gear = Impossible Maneuvering and Track Danger

Even if reverse gear is rarely used during a race, its reliability is crucial, especially in case of a spin or the need for quick maneuvering in the service park. The SADEV Reverse Gear Idler Pinion, 25 teeth (P/N: F1903005) is the gear that ensures the connection between the two shafts to reverse the direction of rotation in your Renault Clio 2 Gr N's ST66 dog-ring gearbox. Wear on the teeth of this pinion can lead to:

The Consequences of a Worn Idler Pinion

• Inability to Engage Reverse: Chipped or worn teeth no longer mesh correctly, making the engagement of reverse gear difficult or totally impossible, immobilizing you when critically needed.
• Loud Noise and Intense Vibrations: Wear on the idler pinion results in loud knocking noises during engagement. These vibrations can propagate and weaken other transmission components.
• Premature System Wear: A worn idler gear aggressively attacks the gears on the primary and secondary shafts with which it meshes. The cost of repair is then multiplied by the necessity of replacing adjacent parts.

SADEV Idler F1903005: Meshing Precision and Strength

This Reverse Gear Idler Pinion 11 / 25 / 36 is a genuine SADEV part, machined to the exact tolerances required for the correct shimming of the ST66 gearbox. Optimiz Access, an authorized distributor, supplies you with this high-quality component to ensure the reliability of your:

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

Maintenance Questions for ST66 Reverse Gear

When should the reverse idler pinion be replaced?

The reverse idler pinion should be replaced as soon as abnormal wear is observed on the teeth (pointed or rounded edges). Its inspection is systematic during a complete dog-ring gearbox overhaul.

What complementary products should be checked?

When replacing the idler, check the condition of the reverse shaft (which supports the idler) as well as the teeth of the driving and driven gear. These complementary products are available at the bottom of this page.

Our Expertise: Authentic Parts and Fast Service

We are committed to providing you with authentic SADEV parts with fast delivery worldwide. Furthermore, our workshop based in the Hauts-de-France region (near Lille, Seclin) offers maintenance and professional installation services for your competition transmission.