Got a 96 Z with new rebuilt 4l60 transmission and with shift kit also 3.73 gears, keeps breaking the rear tran mount, have in there now a unit from summitt which is almost solid and now the noise and vibration is loud, got any idea's on how to quite it back down and not break mounts
thanks scott

 

Not saying that you do, but don't tach it up in neutral and then drop it into drive. That can and will break your mount.

Did you buy a polyurethane mount? If so, you're gonna have to live with the added noise and vibration.

 

Some references from Shoebox's website, re tranny mounts:

http://shbox.com/1/trans_mount.jpg

I'll move this to "Drivetain" where it should be posted.

 

ive got the same set up minus the rebuilt tranny. (shift kit and 3.73s) i am replacing my mount today with an ls1 mount

 

If you put in a poly mount the car will have a lot more noise and vibration for a little while. After a couple of thousand miles both will subside a lot. It still won't be quite as quiet as a stock mount, but it will be pretty close, or at least mine was, as well as a few other people on here.

 

i broke 2 stock ones in like 4 months. Replaced it with the energy suspension poly one, and have had no problems whatsoever. Vibrations are slightly more, but its not bad at all. Its a camaro, its not supposed to be quiet. If you want quiet drive a bmw or something. Give it some time and see if it will quiet down.