Hello everyone and Merry Christmas! I have a 2010 1500 Silverado that has starting bumping real hard when I accelerate from a stopped position. If I ease on the gas, starting real slow it does not do it, however, a normal acceleration it will. Any idea what it could be? Rear drum brakes, u-joints, rear end, transmission?

 

Welcome to the forum. I'll move your question over in the Silverado section where you will get more views.

 

Where do you believe the bump is loudest/strongest? This might help narrow down some.

Don't forget to check the motor and trans mounts..