Gearbox Mount Buying Guide

What gearbox mounts do

The gearbox mount consists of a metal bracket bonded to a rubber or hydraulic damper element, which in turn bolts to the body or subframe. The rubber absorbs vibration and small positional movements, isolating the drivetrain from the body. Hydraulic mounts, used on some vehicles, contain fluid chambers that provide additional damping at specific frequencies.

On front-wheel-drive vehicles the combination of engine mount, gearbox mount, and torque strut (dog bone) mount triangulates the powertrain to resist the torque reaction during acceleration — all three must be in good condition for smooth, controlled power delivery.

Signs of a failing gearbox mount

A thud or clunk felt through the gearshift on gear changes — particularly when changing direction from drive to reverse — is a classic sign of excessive powertrain movement. Vibration at idle that reduces when the gearbox is in neutral can also indicate a failed mount. Visible inspection of the mount under the vehicle with the engine off will show cracking, separation of the rubber from its metal inserts, or a noticeable sag where the rubber has collapsed.

A failed gearbox mount allows the gearbox to move and change the angle of the driveshafts, which accelerates CV joint and inner drive shaft wear.

• Thud or clunk when changing gear
• Vibration at idle in gear
• Visible rubber cracking or separation
• Gearbox visibly drooping when engine is running
• Drive shaft vibration related to mount failure

Replacement

Gearbox mount replacement requires supporting the gearbox with a transmission jack before removing the mount, to prevent the gearbox from dropping or rotating. Replace engine and transmission mounts as a set where possible — if one has failed, others are likely nearing the end of their life. Use the registration lookup to confirm the correct mount for your vehicle.

Frequently Asked Questions