2500 longhorn vibration

[wwest]

Around 40k miles my 2021 2500 began to have a vibration. Assuming the tire tread was getting low i bought 4 identical tires. I still had the vibration, and after having the tires rebalanced 2 more times, i decided to take it to the local dealer. After a diagnostic they determined the drive shaft was the issue and replaced it under warranty. I now have 54k and STILL have the vibration. Any ideas what the real problem is???

 

[rzr6-4]

Accelerating, decelerating, coasting in gear, neutral coasting, always? If at a constant speed, does it change when the tranny up/down shifts? More intense w/ speed, or only through a certain speed range and then goes away again?

A couple days ago I was fighting some vibration and it ended up just being mud in the wheels. Wife's car has had that happen as well. Make sure they are clean both on the outside and the side next to the brakes.

Many variables, need more info.