XUV 620i CVT vibration

[NCFireman]

Would welcome any thoughts on this issue....2007 XUV 620i. 300 hrs, service up to date. As long as the unit is moving at an easy pace, all is well. Upon accelerating, or towing small loads, a vibration, or shaking is both felt and heard from the rear of the machine. There appears to be no loss of power or pull, but it's really uncomfortable and not as the machine performed new. I asked the dealer to investigate at the last service and was informed all is well....I think not. This issue appeared to begin after towing a wood chipper for several days. I know virtually nothing about the CVT unit.
Thanks for your thoughts.

[GATORDONE]

Sounds like it is in the clutch area, Buttons could be missing on the clutch ramps or the belt has a flat spot on it or been slipped could cause the vibration. Welcome aboard fireman.

[NCFireman]

Thanks gatordone..I'll explore this. Glad to be here!