Tranny mount options? Can't stand the vibrations!

I can't take the vibrations at 70+mph any longer. I currently have a polyurethane Energy Suspension tranny mount.

Is there ANY other alternative that won't break like the stock rubber one, but won't vibrate as much!?!

I've found that putting to hose clamps tightly around the stock rubber mount greatly increases its strength. I'm not saying its as strong as a Poly, but it really helps improve the rubber mount.

Installed an LS1 tranny mount and it's sooooo much smoother :)

Installed an LS1 tranny mount and it's sooooo much smoother :)

Where did you order it from? Part Number? Cost?

I cant freaking stand the vibrations in mine anymore. I got a LS1 DS hoping it would help and it did slighty but its feels like the floor boards are going to rip out.

-Dustin-

Matt,
Did you use the spacer between the mount and case? If so, take it out...It'll make it vibrate alot less.

Frank
CPT

I got the LS1 mount from Jason Cromer for $40 or $50 shipped.

I'll try that Frank.

I'll try that Frank.

It works...trust me. I put the spacer in my poly mount when I put it on. It would rattle the fillings out of your teeth with it. Taking it out made a huge difference.

Frank

I got the LS1 mount from Jason Cromer for $40 or $50 shipped.



The LS1 mount will stretch, and allow the trans to bang the floor if you launch hard enough.

Frank

What spacer are we speaking of? My poly mount is all one peice, or so I remember it that way.

I thought about find some rubber or something and shoving it between where the crossmember mounts to the tranny mount and car's floor boards as a buffer, but a LS1 mount seems so much easier.

I'd love to save about $50.

-Dustin-

I just took the spacer out and damn it is SO much smoother. Frank is offically god when it comes to anything 4L60E related. :D

IMO, the LS1 mount is a good "compromise" of strength, while still being soft enough to absorb most normal vibrations. I ran with an ES poly mount for awhile and got tired of the vibes, so I put back my stock (perfect condition) mount. I never tried removing the backing plate from the poly mount though :shrug:. I've also seen my buddy's stock LT1 mount (with maybe ~65k on it) and it was TOAST!! :rolleyes: Granted, his car is an M6, but still, the mount shouldn't be disintegrated like that!!! :no:

Are these vibrations with Poly mounts that common? When I put my clutch in my car, i went with a poly mount and it didn't vibrate in the least. I even used the spacer. Is this vibration only common with the autos?

i dont think so, cause i have a poly mount in(after killing two stock ones)and it doesn't vibrate at all

I installed an ES poly trans mount in mine which was a different thickness than the stock mount and it caused my Pacesetter LT header on the drivers side to hit the floorboard and changed the angle of the driveshaft vs transmission output shaft. I had to fab some 1/2" thich spacers to install between the crossmember and chassis in order to correct that angle and get the header off of the floorboard. But the ES bushing still transfered too much vibes for my nerves to stand. I imagine since I had some DS vibe, even with the stock mount, another driveshaft may have solved a good bit of that vibe problem but I didn't try that.
And, Matt, I know you've seen my solution before but I'll link a picture or two for anyone else with this problem with the ES specs being different than stock causing header clearance and DS angle problems.
And I also eliminated that spacer and it certainly helped, but the vibe thing was still there, although much better.
BTW: I thought you had a source for a different DS. Did that deal not happen?
Spacers 1 (http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/203810/1563715trallnewbushingsandspacerinstalled.jpg)
Spacers 2 (http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/203810/1563711trcrossmemberspacers.jpg)
Spacers 3 (http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/204990/1563725trallfinshedunderneath.jpg)
That didn't seem to work, lets try this one
http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/204990/1563721trtransmounttabushpartnos.jpg

I have also just installed a poly mount in my 95 m6 z and it vibrates some. I was wondering if anyone has removed the spacer on a 6 speed and did it make a difference?

Ls1 Smooth

Frank is offically god when it comes to anything 4L60E related. :D
Well, I certainly agree with the 4L60e related part, and he has certainly been a huge contribution here with tranny info solutions and quality products and service.

I installed an ES poly trans mount in mine which was a different thickness than the stock mount and it caused my Pacesetter LT header on the drivers side to hit the floorboard and changed the angle of the driveshaft vs transmission output shaft. I had to fab some 1/2" thich spacers to install between the crossmember and chassis in order to correct that angle and get the header off of the floorboard. But the ES bushing still transfered too much vibes for my nerves to stand. I imagine since I had some DS vibe, even with the stock mount, another driveshaft may have solved a good bit of that vibe problem but I didn't try that.
And, Matt, I know you've seen my solution before but I'll link a picture or two for anyone else with this problem with the ES specs being different than stock causing header clearance and DS angle problems.
And I also eliminated that spacer and it certainly helped, but the vibe thing was still there, although much better.
BTW: I thought you had a source for a different DS. Did that deal not happen?
Spacers 1 (http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/203810/1563715trallnewbushingsandspacerinstalled.jpg)
Spacers 2 (http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/203810/1563711trcrossmemberspacers.jpg)
Spacers 3 (http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/204990/1563725trallfinshedunderneath.jpg)
That didn't seem to work, lets try this one
http://216.77.188.54/coDataImages/p/Groups/165/165549/folders/204990/1563721trtransmounttabushpartnos.jpg

So perhaps the reason I didn't get any increased vibration could be from the fact that I put a better, new aluminum DS in at the same time as the clutch, and poly mount? I am not questioning you guys, I am just trying to figure out what made it like this. I went from a T56 to an A4, and now I am going back to the T56. I want to run the poly mount because of the strength issue. I guess I will just put it back together and see how it goes, maybe I'll get lucky again and have 0 extra vibrations.

So perhaps the reason I didn't get any increased vibration could be from the fact that I put a better, new aluminum DS in at the same time as the clutch, and poly mount? I am not questioning you guys, I am just trying to figure out what made it like this. I went from a T56 to an A4, and now I am going back to the T56. I want to run the poly mount because of the strength issue. I guess I will just put it back together and see how it goes, maybe I'll get lucky again and have 0 extra vibrations.

There were several factory LT1 application driveshafts with vibe issues that were never addressed with a factory recall but rather a TSB Bulletin No.: 67-41-01
The corrective measures included:
"Install alternate propeller shaft,
Part Number 10085375."
That part # would be an aluminum LS1 application type unit and since you replaced the original part with a different one is likely the reason you escaped having an issue with this after your T56 poly mount install. :thumb:

There were several factory LT1 application driveshafts with vibe issues that were never addressed with a factory recall but rather a TSB Bulletin No.: 67-41-01
The corrective measures included:
"Install alternate propeller shaft,
Part Number 10085375."
That part # would be an aluminum LS1 application type unit and since you replaced the original part with a different one is likely the reason you escaped having an issue with this after your T56 poly mount install. :thumb:

Thanks, for the information. I have been trying to figure this out for a while now, because so many complain about these vibrations. I will go to an aftermarket shaft this time as well, and hopefully be virbration free.

Not sure why Matt didn't respond back yet, but the reason he went back to the poly mount was he killed the LS1 mount in a really short time, If I recal less then a month or so... So not sure if I would say there was a good comprmise there?

My ES poly mount vibrates alittle but not like you guys are discribing. it sure beats the clucking everytime the tranny hit the floor board thats for sure.

Not sure why Matt didn't respond back yet, but the reason he went back to the poly mount was he killed the LS1 mount in a really short time, If I recal less then a month or so... So not sure if I would say there was a good comprmise there?

According to what he told me online a few nights ago, he thought he ripped the LS1, but when he checked it was actually fine. Cause I was going to buy his LS1 mount from him but he seemed like he wanted to keep it.

All cars are going to be different. Mine shakes so badly that I can see the floorboards flexing and my passenger seat looks like a space shuttle launch. The dash and every bounces around. Its pretty bad, especially at 65mph+

-Dustin-

Yeah I had the LS1 mount in July before I broke the stock tranny....

I'm thinking it may have been my exhaust smacking the floorboard and not the tranny, because afterwards I found one of my hangers was loose.

According to what he told me online a few nights ago, he thought he ripped the LS1, but when he checked it was actually fine. Cause I was going to buy his LS1 mount from him but he seemed like he wanted to keep it.

All cars are going to be different. Mine shakes so badly that I can see the floorboards flexing and my passenger seat looks like a space shuttle launch. The dash and every bounces around. Its pretty bad, especially at 65mph+

-Dustin-
Oh for some reason I thought he broke it too, I quess not then...