Transfer case chain (NV235, NV235 PL72)

A common cause for clicking or popping sounds under load in vehicles equipped with the NV235 transfer case is a stretched chain. When the chain loses its tension, it “jumps” over the sprocket teeth, which can lead to a loss of 4×4 functionality and potential internal damage.

Yes, this transfer case chain is specifically designed to fit both the NV235 and the NV235 PL72 versions used in various Porsche and VW 4×4 drivetrains. It ensures the necessary connection for optimal power distribution between the front and rear axles.

The most frequent symptoms include a jerking sensation during acceleration, loud clunking noises when the 4×4 system engages, and a vibration felt through the floorboards. If left unaddressed, a loose chain can eventually wear through the transfer case housing.

Replacing a transfer case chain requires removing the transfer case from the vehicle and splitting the case open. While it is a straightforward job for those with mechanical experience and standard shop tools, it is recommended to have a professional handle it to ensure proper sealing and torque specs.

This chain provides consistent and uniform power transmission. By replacing a stretched or worn chain, you restore the precise synchronization between the axles, ensuring that the 4×4 system operates smoothly without slipping or mechanical hesitation.