Outer Limits 4x4 Board

hey all
on the rear diff of my sj8a seirra there is a bracket with what looks like a
large coil of rubber. can anyone tell me what this is for? there is a similar
item attached near the transfer case. is this some sort of vibration dampenor?

Is it a bump stop to stop the diff / tailshaft bottoming out on something ?

Nick

im not sure. the bracket that holds it to the diff has cracked in half so it could be from bottoming out on something. the one mounted near the transfer case is exactly the same though.

post a pic.