RENAULT TL4 125 6 SPEED

TL4 6-Speed Gearbox – Fully Reconditioned

Fully rebuilt TL4 6-speed manual gearbox, used across various Renault, Nissan, and Vauxhall vehicles. Designed for smooth, reliable performance in mid-size petrol and diesel models. Reconditioned with new bearings, synchros, seals, and thoroughly bench-tested. Backed by a 12-month warranty.

Fits:

• Renault Trafic, Megane, Laguna, Scenic, Koleos
   
• Nissan Primastar, Qashqai, X-Trail
   
• Vauxhall Vivaro A (1.9, 2.0, 2.5 CDTi)
   
• Typically found in 1.6L – 2.5L petrol & diesel applications
   

Gearbox Code: TL4 – various ratio and bellhousing versions available
Please confirm your gearbox code or VIN before ordering.

• TL4-014 

• TL4-039 

• TL4-056 

• TL4-079

• TL4-356 

• TL4-375

1. Premature wear / poor assembly issues

TL4 gearboxes have been reported with poor build quality, underfilled oil, and case depressurization early in life, even at relatively low mileage — leading to premature wear of internal components.

2. Synchromesh wear / crunching gears

Many owners report crunching when shifting into certain gears (especially 3rd or 4th), often linked to synchro wear inside the TL4. This symptom appears even on relatively low-mileage units according to forum accounts.

3. Bearing wear / need for rebuild

Bearings inside the TL4 are a known wear item (and there are aftermarket bearing & oil seal rebuild kits available), suggesting that bearings and seals often fail or wear prematurely.

4. Internal selector components and related parts

While less documented in formal bulletins, enthusiast discussions indicate internal parts like the selector parts, sleeves or dogs may wear or break, requiring teardown and repair.

5. Need for proper lubrication / maintenance

The TL4 can suffer accelerated wear if gearbox oil is never changed — despite manufacturer claims of “lifetime oil.” Some owners recommend regular oil changes to protect synchros and bearings.

6. Operator / usage influence

Multiple owners mention that rough or high-RPM shifting accelerates wear, especially on higher-revving petrol engines.