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Automann · Suspension & Steering
M20310UB
In stock · ships from Knoxville
This is a polyurethane motor mount bushing for the rear engine mounts on Peterbilt 379, 386, 387, 388, and 389 trucks equipped with Caterpillar engines (3406B/C/E, C10, C11, C12, C13).
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Verified fitment for 5 applications
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All confirmed applications for this part number.
Caterpillar
Caterpillar
Rear motor mount, 4 per truck. Compatible with Caterpillar 3406B/C/E, C10, C11, C12, C13 engines. Uses M4962 bolt and LN104 lock nut (sold separately).
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 14 of 14.
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It replaces the original rubber bushing with a tougher polyurethane material to better dampen engine vibration and resist wear. Four of these bushings are needed per truck, and they are installed with M4962 bolts and LN104 lock nuts. Replacing worn motor mounts helps prevent excessive engine movement and protects driveline components.
Part Number: M20310UB
MOTOR MOUNT BUSHING POLY PETERBILT
Vendor: Automann
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering
