well ima driving from a stop in a 90 rx-7 gtu and th rear diff seems fine , but when i shift i hear a clunk in the rear, my friend drove it and he says it the rear diff mount could that be tru or something else cuz he said the diff is fine , if it wasnt it wouldnt spin or drive ?

 

yeah the diff mount is broke, they are about $160 from mazda I think, and a couple hours to change it. Just did mine last week.

 

yeah i calld them today and its 160, is it really ahrd to change what do i have to do can it be done with a jack and some tools or i need some hardcore tools and stuff?

 

Just put the car up on jack stands, remove the y-pipe from the exhaust, remove the 2 large bolts that hold the sub frame to the body of the car, remove the bolt from the one suspension link behind the diff, and the diff and subframe should both drop down enough to get the bolts loose on the mount. Use the jack to jack the subframe back into place with the new mount. Tools include: jack, pry-bar, wrenches, 14mm u-joint socket I think, and extension and ratchet and other sockets (12,14,17,19,21 are all a good idea). No crazy tools needed.