Identify This Part - Underside of Bed Box - Vibration Damper

AZEngineer said:

There is a vibration damper which is a piece of cast iron mounted in rubber bushings. It's mounted above the drivers side frame rail between the rear tire and the bumper. I've read that the rubber mounts fail and the cast iron can flop and make noise, plus of course it no longer damps vibrations. Lay under the truck and see if it's still suspended in the mounts or loose.

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