I have a manual 1989 Z32 2+2 TT, and have done some major work to the car since purchasing it 4 years ago... When I first bought the car, it had a clunk which was obviously the engine mounts, they were torn in half. Replaced the motor and the engine mounts at the same time, just some generic Mackay rubber mounts. Replaced the trans mount with a Nismo one. Also an Xtreme cushion button clutch at the same time. I still have a driveline clunk, which presents itself a single loud clunk from the rear when driving when I push the throttle and the driveline torques up under acceleration, and another clunk if I let off the throttle again. Does this in any gear at any speed while driving. Does it when wheels are in the air, although much easier to make clunk with wheels in the air. I have tried: Energy Suspension subframe and diff mounts Brand new OEM centre carrier bearing Checked driveshaft u-joints, they are nice and tight and smooth CV axles regreased (does not confirm whether they are good or not though) Checked wheel hubs, zero play in outer hub splines to CV axles. Packed splines with grease too. Replaced manual trans. Wheel bearings have zero play and spin smooth With the car up in the air and handbrake on, I can rotate the driveshaft by hand maybe 1/8 - 1/4 of a turn and clunk the driveshaft/diff/axles back and forth and this makes the same sounding clunk as I've been hearing - from a few other ancient forum threads I have gathered this axial play might be normal and not necesserily the cause of my clunk. I've also noticed there is a tiny bit of wiggle in the output hub splines in the diff output flanges - not sure if this is normal or not, but I gather it probably is, I have two diffs here that both feel the same. My only guess left at this point is maybe trying some new axles but where the f*ck would you even find those these days? So I'm at a loss trying to find the source of this stupid clunk, any suggestions or pointers would be great.