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Bell Ringer February 7th, 2018 09:04 PM

Rear in thump on 93 f250
I am getting a thump when starting forward movement and same in reverse. When backing out of parking spot with wheels turned it can be stronger noise and a bump. This happened about 6or7years ago. I was advised by mechanic to add a can of the friction oil to rear end. Seemed to work ok for about 30k miles.Bearing noise started a few months ago so just had a kit installed in rear axle. No noise now but thump in rear end has started up again. Any advise for my baby. P.S. The bump can be quite strong. Years ago we thought we had backed into a car when backing. Got out and checked and was 6 feet away from car.

glc February 8th, 2018 01:37 AM

Did they use fresh fluid and friction modifier when they rebuilt the rear?

Check the u-joints. Check the leaf springs and mounts. Check the rear brakes and parking brake.

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