I have a 2007 Ram 3500 single rear wheel mega cab. Just replaced the front drive shaft, all rear drive shaft u-joints, carrier bearing, and balance all wheel. At 60m/hr, & above there is still a severe vibration. Anyone have any ideas. Thanks SD1

 

My 06 did that right after replacing rear joints. After worrying with it for a year, replacing joints again, having drive shaft balanced, I put a new drive shaft in. Problem solved. I still don't understand why balancing it didn't fix it unless it was bent.