Wobbling rear wheel/s

[howzzzit]

Originally Posted by HO455

Several things to look at.
Is the wheel seated completely on the drum? (Assuming drum brakes)
Is the drum completely seated on the axle flange?

If all that is good then it's time to check to see if the axle is bent. Remove the tire and brake drum. You will be checking the axle for run out. Ideally using a dial indicator but a stiff piece of heavy wire will work.

https://youtu.be/1w21GwZXmZ4?si=4fBLJOPujJMh1TgJ

Attach the wire to the axle, (clamping it will work as long as it is secure) then bend the wire so the end is pointing at the axle flange as close to the outer edge as you can without touching it. Have someone rotate the axle slowly while you watch the relationship of the flange and the end of the wire. If the axle is straight and true the distance between the flange and the wire will not change. If the axle is bent you will see the wobble again but on a much smaller scale.

If this shows the axle to be true its time to take the wheel to the shop for another look at it.

Could be not seating as stated. I had rally wheels powder coated and not one of the four would mount up to the front or rear. I used a drum sander and took off a little at a time until they fit over the drum and hub. May be your problem. You didn't mention the fronts.