I had a radial rock problem with several sets Hoosiers 14.5x33. They were aware of the problem and their fix was to stop making large size radials. I then used M/T and never had the problem again. I think your problem is that the Goodyears are made for a lighter car. That is why I don't use them and that is why Goodyear doesn't recommend them for Super Stock. I run NHRA super stock and have never seen a super stock using a Goodyear Radial in recent years. Look at the AH cars that run automatic transmissions. They all run Mickeys