My M6 z28 has a wierd pop and somtimes the rear of the car feels as if it moves when the pop occurs. It has happened 4-5 times. I have c5 wheels with 295 35 18's out back. There is no contact issues with the tires or the rims. I have opened up the rear end cleaned and refilled it with syn 75w-90 and L/S additive.
I checked gear wear it looked fine. I tightend the bearing caps etc.. zexel/torsen worm gears look good. I checked down the drive line from rearend to T-56 making sure everything was tight. LCA's, Torque arm, trans mount, trans, u-joints, shocks, swaybar. what else should I check.
Maybe this is normal. I have owned the car a year and never had the issue before. The most recent add on were the C5 wheels and 295 35 18's. Any ideas are welcome. Ron