Weird rhythmic bump
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Joined: Aug 2018
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From: Missouri
Weird rhythmic bump
So just recently I noticed a weird rethmic bump in my truck that seems to be coming from the rear end. The truck is a 2wd non limited slip diff. At first I thought the truck had a broken axle but after putting it in the air and spinning one side tire the other turned the opposite direction like normal. I then put the truck under its own power and at idle only one tire rotated. I’m not to sure if that’s normal but again both tires rotated when in park. I also checked both sides for any sign of dragging but couldn’t feel anything abnormal. My only guess is it is something in the front end but I don’t feel in vibration or jerking in the steering wheel. The bump is almost like someone tied a board to the rim of my tire and I’m constantly running over it because it increases with speed.
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Joined: Apr 2010
Posts: 87,399
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From: Clayton MI
Sounds like shifted belt, or separated tread in one of the rear tires. Put it up again, and run your hand along the tread of the tire. A bump like that, you should be able to feel it pretty easy.
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Registered User
Joined: Aug 2018
Posts: 17
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From: Missouri
this is a little late but i did find what the issue was. my front right tire had a separated belt and tread and ended up letting go on the highway. luckily it caused no damage other than needing a new tire. a few weeks later I discovered that the front left tire was nearing the same fat, with a large bulge in the tread from where there was separation and noticed that the tread pattern was a little wavy side to side. im glad i caught it when i did or else that truck may have found an early grave on the highway.