Well wait, you mentioned the dealer getting you a new rear axle, what does that have to do with the bent rods, or did they lead to the failure of the rear axle?
Guess Im trying to figure out if this is a rear axle or rear axle placement issues, and if its amplified by lifting the VX (the rear locating rod angle does change with a lift, and so would the "placement" of the rear axle), not just from possible off-road abuse.
As it sounds like everyone that lifts the VX has this vibration issue, and I would like to have the solution to fixing it.