2002 Dodge Ram Quad Cab 4x4
Here recently there has been a bad vibration when I am coasting but as soon as a hit the gas it goes away. It feels like its under the truck. Also when I put it in neutral there is NO vibration. There is just vibration when coasting only. What could this be?

 

It is more than likely either a bad u-joint or too much play in the rearend.

 

Thanks, It shakes at a very very low speed. As soon as I put it in drive it shakes when coasting, then I hit the gas and its gone.

 

Slip Yoke separated from Rear Diff. Wheels locking up.. vibration.. barely made it home. Any insight would be much appreciated.. can I just replace the yoke or is my Rear Diff junk?