I took my car back to the track last night and made about 9 passes. On the last one when I slammed 3rd the car shook pretty violently. I coasted to the end and figured my rear end just bit the dust. Driving up to the time slip booth everything seemed fine. Gassed it a little in the pits and couldn't get it to recreate what happened. I figured it was wheel hop and my friend who was watching outside said the same thing. He said the back of the car was dancing around pretty good......Long story short, today I got it to do it again, this time while driving easy, but shifting super fast into 3rd. I was only 1/4 throttle and 3000rpms, so it wasn't wheel hop. The torque arm looks fine, as does the rear end. The tranny was recently gone through and has some upgraded stuff like carbon kevlar syncros and bronze fork pads etc.
Anyone have any ideas? Could this be my single disk McLeod? Could loosing a spring or two in the clutch cause this? Any ideas would be greatly appreciated.

Todd

 

trans mount or torque arm mount are my guesses

does it happen if you hit 2nd hard??

 

No, only 3rd, but I'm assuming this might be because all the torque goes out the tires because they just spin when hitting 2nd. I looked at those mounts already, but I'll give them another once over to make sure. Thanks.