Urethane trans mount: your thoughts?
Thread Starter
Race Director
Joined: Mar 2001
Posts: 11,601
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From: San Francisco CA
St. Jude Donor '07
Urethane trans mount: your thoughts?
My old mount is almost toast, so this is more of a two part question.
A) Is the urethane mount worth it? Do I need to run different motor mounts too?
B) Should I use the old mount until the urethane one gets here? The old one is, well, old and I'm not sure how that would affect the car.
A) Is the urethane mount worth it? Do I need to run different motor mounts too?
B) Should I use the old mount until the urethane one gets here? The old one is, well, old and I'm not sure how that would affect the car.
Team Owner
Joined: Jun 2004
Posts: 20,216
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From: Smile, it's just the internet.
I've always heard that the trans mount should be equivalent stiffness to the engine mount. If the two must be different, then the trans mount should be the softer of two.
Is it worth it? Probably not, but that's what I've got! Went with poly engine mounts for less flex, so I figured I'd match the tranny mount.
I've also heard that the Energy poly tranny mount is too thick. I used a Prothane tranny mount and Energy engine mounts. No issues for me...
Is it worth it? Probably not, but that's what I've got! Went with poly engine mounts for less flex, so I figured I'd match the tranny mount.
I've also heard that the Energy poly tranny mount is too thick. I used a Prothane tranny mount and Energy engine mounts. No issues for me...
Premium Supporting Vendor
Joined: May 2000
Posts: 4,312
Likes: 70
From: Clearwater FL
I thought I remember reading here awhile ago that the poly tranny mounts were not good to use b/c they were a different hieght than the stock rubber. Had something to do with the poly mount throwing the angle of tranny off and causing vibrations. Could be wrong though.
Race Director
Joined: Jul 2001
Posts: 15,892
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I've always wondered why people would want a poly mount in ANY location- body or engine or transmission.
These mounts are made of rubber specifically to isolate vibration. Why would anybody want to defeat that function is beyond me.
There is no 'performance upgrade' factor involved, despite what speed vision TV says.
These mounts are made of rubber specifically to isolate vibration. Why would anybody want to defeat that function is beyond me.
There is no 'performance upgrade' factor involved, despite what speed vision TV says.
Race Director
Joined: Feb 2005
Posts: 16,100
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Originally Posted by Van Steel
I thought I remember reading here awhile ago that the poly tranny mounts were not good to use b/c they were a different hieght than the stock rubber. Had something to do with the poly mount throwing the angle of tranny off and causing vibrations. Could be wrong though.
Drifting
Joined: Nov 2002
Posts: 1,665
Likes: 1
From: Ontario
Originally Posted by Buffalo Dude
The old one is, well, old and I'm not sure how that would affect the car.
Thread Starter
Race Director
Joined: Mar 2001
Posts: 11,601
Likes: 0
From: San Francisco CA
St. Jude Donor '07
Originally Posted by Boofers
How about causing your bellhousing to crack.
I think I'll just run to Kragen and get one. Looks like it's in stock for ~$7. 
I get the impression that urethane isn't really worth it unless going for the whole setup, so I'll stick with rubber.
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