MOUNTS & BRACKETS

Mounts & Brackets For Peterbilt Trucks

Engine mounts, cab mounts, battery tray mounts, and accessory brackets are the structural and isolation hardware that keeps major components properly positioned on a Peterbilt truck. Worn or failed engine mounts allow excessive drivetrain movement that stresses exhaust connections and wiring harnesses. Failed cab mounts transmit vibration directly into the cab and can allow cab movement that stresses door seals and latch alignments. We carry engine mounts, cab mounts, and a range of accessory mounting hardware for Peterbilt trucks.

Frequently asked questions about mounts & brackets

How do I know if engine mounts are worn on a Peterbilt?

Worn engine mounts allow the engine and transmission to move excessively during acceleration, deceleration, and gear changes. Symptoms include a clunking sensation during throttle tip-in, increased vibration transmitted through the cab floor and shifter, and exhaust flex joint failures from the engine rocking against the fixed exhaust system. With the engine running at idle, carefully observe engine movement from a safe position — more than a few millimeters of rocking motion indicates mount deterioration that warrants inspection and likely replacement.

What causes cab mounts to fail on a Peterbilt truck?

Cab mount isolators are rubber bushings that absorb road shock and prevent cab vibration — the rubber hardens, cracks, and eventually collapses from heat, ozone exposure, and the cumulative compression of high-mileage operation. Trucks operating on rough roads, in logging or mining applications, or with significant cab tilt cycles see accelerated cab mount wear. A collapsed cab mount on one side causes the cab to sit unevenly, which misaligns the doors and seals and can crack cab-to-chassis wiring grommets.

Can I replace individual cab or engine mounts, or do they need to be replaced as a set?

Individual mounts can be replaced if only one has failed, but on a high-mileage truck where one mount has worn through, the remaining mounts are likely not far behind. Replacing all mounts as a set during the same job saves significant labor over doing them piecemeal, since the cab or engine typically needs to be supported in the same way regardless of how many mounts are being changed. A matched set also ensures even load distribution across all mount points after the repair.

Other parts you might need

Shop brackets & hardware for Peterbilt trucks