why does it shakes alot on 2007 Ford Expedition

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
only when driving n reversing it shakes alot n nothing happens in neautral
(3) Answers
Sounds like it could be the front differential. I would suspect it is the 4x4 tranfer case connecting to the rear drive shaft. Need to check u-joints on the rear drive shaft as well to make sure the shaft itself is not the problem.
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