sempire

iTrader: (5)

I installed an ES poly transmission mount last week and i think my pinion angle is off because at 50mph and above i feel a horrible rear end vibration that feels similar to the same one you get with a bad driveshaft..

I need a solution.. do I grind down my poly mount? Some people said it will go away, but i'm not sure.. I really need some input before I flip my wig..

joe77

if the angle is off why dont you check it, i dont think the angle finders are much money

TheSilverOne

iTrader: (22)

people here grinded down the poly trans mount

01ssreda4

iTrader: (96)

Put the stock rubber one back on.....Especially if you still have stock rubber motor mounts. Don't fall for the poly is better crap. It will turn your normal car into a vibrating headache.

sempire

iTrader: (5)

I'm going to put some 2.5mm shims in and see what happens..

01ssreda4

iTrader: (96)

Are you running rubber or poly motor mounts?

BMR Sales2

iTrader: (40)

I would definitely check the pinion angle with an angle finder before I did anything. For the pinion angle to be causing a vibration like you are describing it would have to be off by a large amount. If I had to guess it is more than likely just the super stiff trans mount that is causing the vibrations, but I would find out your current pinion angle before I did anything else.

Jays_SSZ28

iTrader: (2)

Measure the difference between the stock mount and the poly mount. The poly mount is taller. Shim the crossmember down the difference.

When you go with a taller trans mount it moves the trans tail up and the rear pinion up, that screws up the angle and thats why they all vibrate.