2000 Expedition Shimmy
 

I have changed Tires,rebalanced, BoughtNewRims, changed U Joint, Front End alignment and had it checked. Continue to have a shimmy. It appears to to be from the rear end. I am not sure if it can be Drive Shaft, out of alignment rear end, or bent axle. Anyone had this issue looking to finally get to the source of the vibration. It starts at around 50 and shakes the most at 64 out to 70.