SADEV Secondary Shaft Nut F1903204 - Clio 2 Gr N ST66 Gearbox

The Weak Link: SADEV Secondary Shaft Nut F1903204 for ST66 Gearbox

Never underestimate the importance of a tightening component in a competition transmission. The SADEV Secondary Shaft Nut F1903204 is designed to withstand the extreme vibrations and thermal stresses of your SADEV ST66 gearbox. The danger lies in reusing a nut: its initial deformation will prevent it from achieving the required tightening torque, leading to disaster on the Renault Clio 2 Gr N.

Consequences of a Failing Secondary Shaft Nut:

• ❌ Loosening and Misalignment: If the nut no longer properly retains the final drive, the assembly can loosetrag. This causes excessive axial play and misalignment of internal components.
• ❌ 5th Gear Pinion Destruction: A loose nut jeopardizes the 5th gear pinion and the bevel gear set on the secondary shaft, leading to a high risk of complete destruction of the pinion and irreparable damage to the casing.
• ❌ Performance Loss: Premature wear of the secondary shaft threads due to a defective nut requires an expensive replacement of the SADEV shaft itself, immobilizing your competition vehicle.

Original SADEV Part: Security and Tightening Reliability

The Nut F1903204 is a high-precision part treated for anti-loosening, specific to the secondary shaft assembly of the SADEV ST66 gearbox. Its role is to maintain pressure on the secondary shaft bearing and guarantee the integrity of the entire gear cluster and differential. Using an original SADEV nut ensures that the manufacturer's mounting specifications are met.

Key Searches: SADEV Shaft Nut Clio 2 Gr N, ST66 Gearbox Tightening

This component is strictly intended for the SADEV ST66 gearboxes of the Renault Clio 2 Group N. Optimiz Access is your trusted distributor of SADEV Motorsport parts for this range of vehicles and other competition models:

• Renault Clio 2 X65 Cup
• Renault Clio 3 X85 Cup
• Renault Megane N4
• Twingo R2

Ensure the longevity and performance of your gearbox. Optimiz Access guarantees EEAT quality and fast shipping.

Expert Advice: Should the nut be replaced at every overhaul?

Yes. In competition mechanics, the secondary shaft nut (like any self-locking or single-use nut) is a safety consumable. It must be imperatively replaced at every intervention on the shaft to ensure maximum tightening torque retention and avoid any risk of fatal loosening during a race. This is the golden rule for SADEV reliability.

Optimiz Access: Sales, Fitting, and SADEV Expertise in Hauts-de-France

Our services go beyond the sale of quality parts. Our workshops near Lille, Cambrai, Valenciennes, and Arras are equipped for the complete maintenance and expert fitting of your SADEV components. Benefit from our technical know-how specialized in sports vehicles.

Essential complementary products for reassembly are available at the bottom of this product page.