Transfer case chain (NV225)

Common symptoms of a stretched NV225 chain include a loud clicking or popping noise under heavy acceleration, jerking sensations during takeoff, or the 4×4 system failing to engage smoothly. This happens when the chain becomes loose and skips over the gear teeth.

Yes, the NV225 transfer case was primarily used in early Range Rover L322 models (typically 2002-2005). If your vehicle uses the NV225 unit, this chain is the correct replacement for maintaining proper power distribution between the front and rear axles.

This is almost always due to a worn or elongated transfer case chain. Over time, the links stretch, allowing the chain to jump teeth on the sprockets. Replacing the chain promptly is essential to prevent internal damage to the transfer case housing.

Replacing a transfer case chain is a complex task that requires removing the transfer case from the vehicle and splitting the case. While possible for an experienced DIYer with the right tools, we recommend professional installation to ensure correct tensioning and sealing.

The chain is the critical link that transfers torque from the input shaft to the front output shaft. If the chain is worn or broken, the front wheels won’t receive power correctly, compromising your vehicle’s off-road and all-wheel-drive capabilities.