ok i thought i had gotton rid of the dif noise but now im getting a clunking kinda vibaration from the back when i back off on the power (sounds almost like a flat tyre)
diff? bearing? driveshaft? it doesnt seem to change if i break so im thinking driveshaft or diff?
Yep, probably the pinion gear suspect, if you get to it soon you may be able to change the bearings and and get the thrust washers retorqued.
Get it done quick, or you'll be buying a new diff.