Why is this on the axle???

[VXorado]

I just did a diff drop and there was no weight on my diff. mine is a 2001 I don't know if that makes a difference. It looks like it may have something to do with reducing vibration. Is there any rubber between the weight and the diff?

No rubber but it has 2 bolts & a bracket that hold it above the diff. Is there anything on the top of your diff? I got the diagram from the 2001 VX service manual, so I assume your diff should have a weight.

I don't see how you could drop it 2" and now it hits the frame. The diff shouldn't move once bolted back in place.

The diff does move... 2 inches down . The frame goes inward for the control arms/crossmember and when the diff is lower it has less room side to side.

I'm putting the weight on a grinder slimfast diet to see if that helps