Way2Fast

iTrader: (1)

So, I did the poly motor mounts when I did my header swap. After a little beating on the car the trans is slapping the tunnel on hard acceleration now. I ordered a poly trans mount and was wondering if that would be an issue. Seems I remember hearing a long time ago that its ok to have one or the other, but not both. Is there any truth to that or is it just that I will feel more vibes and noise now. Thanks in advance.

redbird555

iTrader: (14)

you can do a poly trans mount and MM's however I had it for about 2 weeks and took it off, annoyed the crap outta me because everything vibrated at random speeds.put in an oem one and all is well. mine was an energy suspension my buddy has the same setup with prothane and its not as bad...

jrob56

iTrader: (39)

Poly MM and rubber trans=all good
Poly MM and Poly trans=all good
Rubber MM and poly trans= bad news bears

This is the one you were thinking of.

TImmy_Jones

iTrader: (4)

The poly trans mount will make vibrations more prevalent.

Way2Fast

iTrader: (1)

Thanks. I am not too concerned about the vibes as long as it doesn't cause issues as this isn't my dd.

CayenneRedV6

iTrader: (8)

You can limit vibration issues by not using the plate they include with it and by grinding down the humps on the bottom so its the same hight as the stock rubber piece, that's what I did.

jrob56

iTrader: (39)

With good results? I want to try out the poly here soon, but since I drove it a lot, Im shying away from it.

nj02z

iTrader: (6)

I just put on poly motor mounts and poly trans mount and ended up taking the trans mount back off and put the stock one back in.Alot less vibration.

99Bluz28

iTrader: (35)

Use ES #3.1142, it has no preload bumps.

Way2Fast

iTrader: (1)

So don't use the plate and shave the preload bumps and it will not feel as bad and still do the job. I will let you know how it goes, it should arrive some time next week.

ldyzluvdis06

iTrader: (24)

damn!! i ordered poly MM and TM and am about to install them. already trashed my factory TM, now im thinking i might want to buy a new trans mount...

therobman

iTrader: (39)

i have poly mm's and had a poly tm its horrible i would never use a poly trans mount again f bodys already rattle and clunk like no tomorrow this doubles it

blacknyellow

iTrader: (3)

+1 for annoying poly trans mounts. poly motor mounts are fine

mjs1012

iTrader: (36)

I had a poly trans mount with the stock rubber motor mounts and it was terrible. Ill never run a poly trans mount on a street car again.

Way2Fast

iTrader: (1)

I like the poly motor mounts personally. I don't drive a luxury car, I drive a Camaro. Yeah it vibrates more than a stock car, but at least the engine isn't trying to touch the inner fender wells.

+badss+

iTrader: (12)

i have poly mm and tm i only have vibes from 68-74 mph i just turn on radio and dont hear a thing.. some can stand it and some cant install it see if you like it..

Way2Fast

iTrader: (1)

Good to know. I might be a little different than some as I dailied my 98 wit a roll cage and no swing outs. It only takes a few good launches to trash a stock trans mount, so I wanted something to take the abuse. If you don't race your car, I see the point about the vibes. Of course, I haven't raced this one with sticky tires and the trans is already hitting the tunnel.

03Sssnake

iTrader: (20)

I have solid UMI aluminum motor mounts and new stock rubber trans, no vibes while moving, only at idle I did have a poly trans, it was bit much with the UMI MMs in...

AmarilloWS6

iTrader: (3)

I don't have any problems with my poly mm & tm at all, not even vibrations. I didn't use the plate everyone talks about too. Guess it's hit or miss?

Element

iTrader: (5)

I've got solid motor mounts and a poly trans mount on the car now. I'm not too picky about vibration or noise, but with solid motor mounts and 4.11s in a 10-bolt, the poly trans mount just transfers too much noise. Couple that with dumped duals, and it's impossible to talk to someone sitting in the passenger seat.