Zdahl_Chevy23

iTrader: (1)

I just put a poly tranny mount in my 98 Z28 A4 now i have a bad vibration at higher rpms. Do i have to put the poly motor mounts in as well or maybe just shim it differently because it did come with a couple shims. Any input would be greatly appreciated.. Thanks

Blazingz28

iTrader: (5)

There is 2 humps on the poly tranny mount.. Some people have had luck grinding those down flat.

I gave up on the Poly mount but Im going to try that next

I didnt like the Poly vibrations, went back to stock rubber, and it broke again in 4 months.

bigti99a

iTrader: (16)

i had the same issues. the vibrations went away after a couple days. dont know why. i checked and everything was still tight. but i have heard of people grinding those humps off.

foreverzero

iTrader: (5)

its normal to get vibrations from poly mounts, they should go away after a week or so, also make sure the nuts are tight, because the bolts are facing down, the nuts are more likely to loosen themselves

Killer_Z

iTrader: (1)

needs to be broken in, give it a few hundred miles and it will be minimal after that.

Zdahl_Chevy23

iTrader: (1)

thanks for the input i really appreciate it

bluehawk2

iTrader: (74)

I shimmed my crossmember down about 1/4-1/2 of an inch with my energy trans mount. I don't have any vibration with it now.