Polyurethane tranny mounts..whats up?
Thread Starter
Team Owner
Joined: Feb 2003
Posts: 30,183
Likes: 313
From: Lake Norman NC
Polyurethane tranny mounts..whats up?
Ok, i got a brand new Energy suspension poly transmission mount and a brand new rubber mount for the M20. Whats wrong with this??
Can you use the poly mount??.seems like it would screw up the whole geometry with the driveshaft...Thanks.
Can you use the poly mount??.seems like it would screw up the whole geometry with the driveshaft...Thanks.
Last edited by LFZ; Jan 12, 2005 at 09:27 PM.
Team Owner
Joined: Jul 2004
Posts: 40,324
Likes: 786
From: Redondo Beach, California
I have both of them, to get the transmission mount correct I bought two - rubber and urethane (maybe three). I compared them with the stock transmission mounts. I used the one that has the same height as the factory original. I think it was the rubber one. There really is a quality problem with repro parts. I'd like to think that the Corvette parts houses are fighting this problem for us. If they are, defective repro's are still getting through the system.
Last edited by 68/70Vette; Jan 12, 2005 at 09:37 PM.
Thread Starter
Team Owner
Joined: Feb 2003
Posts: 30,183
Likes: 313
From: Lake Norman NC
Originally Posted by i885744
i used the taller energy suspension unit, no problems here... Keeping fingers crossed.
Tech Contributor
Joined: Aug 1999
Posts: 15,130
Likes: 3,938
From: Connecticut, USA
Had the same problem last year and called ES. Tech told me the 3.1108 mount would work on everything BUT corvette. I still have it sitting on my desk.
I used one from Prothane and it was a better fit. This year I purchased another Poly mount set from Summit because they said it fit Corvette-was the same thing, returned it and will use a rubber mount instead for the next install- Th400.
Gary
I used one from Prothane and it was a better fit. This year I purchased another Poly mount set from Summit because they said it fit Corvette-was the same thing, returned it and will use a rubber mount instead for the next install- Th400.
Gary
Thread Starter
Team Owner
Joined: Feb 2003
Posts: 30,183
Likes: 313
From: Lake Norman NC
Originally Posted by gtr1999
Had the same problem last year and called ES. Tech told me the 3.1108 mount would work on everything BUT corvette. I still have it sitting on my desk.
I used one from Prothane and it was a better fit. This year I purchased another Poly mount set from Summit because they said it fit Corvette-was the same thing, returned it and will use a rubber mount instead for the next install- Th400.
Gary
I used one from Prothane and it was a better fit. This year I purchased another Poly mount set from Summit because they said it fit Corvette-was the same thing, returned it and will use a rubber mount instead for the next install- Th400.
Gary
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Thread Starter
Team Owner
Joined: Feb 2003
Posts: 30,183
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From: Lake Norman NC
Originally Posted by Schmucker
Can't you just not use the shim underneath it? I don't know, I don't remember what my mount was like. I had the same one and used it on my 200-4R. Angle was only like 1.5 degrees.
Pro
Joined: Apr 2004
Posts: 687
Likes: 0
From: Atascadero Ca
I really don't see what all the fuss is about. The driveshaft has U-joints on both ends. If you look at any truck the pinion angle is way way more than the angle on my vette even with the energy suspension tranny mount. I have a friend with a 78 chevy 4 wheel drive, with a similar dana 44 front axle. His driveshaft is shorter than mine with a much greater angle between transfer case and differential and he's put thousands of miles on it with no problem. I can take pictures and measurements if you want, I've put about 1000 miles on my vette setup with absolutely no problems.
Do the math. The energy suspension setup is i'm assuming 1/2" taller than stock. We have about a 2' driveshaft. So tan^-1 (.5/24) = 1.19 degrees. 1.19 degrees is nothing compared to the angles on everyday trucks. The shifter height in the car with the poly mount is actually better than with the stock mount. I'd put in your poly mount. The worst that can happen is you have to jack up your tranny and change it out for the rubber mount, takes all of 5 minutes.
Do the math. The energy suspension setup is i'm assuming 1/2" taller than stock. We have about a 2' driveshaft. So tan^-1 (.5/24) = 1.19 degrees. 1.19 degrees is nothing compared to the angles on everyday trucks. The shifter height in the car with the poly mount is actually better than with the stock mount. I'd put in your poly mount. The worst that can happen is you have to jack up your tranny and change it out for the rubber mount, takes all of 5 minutes.
Last edited by i885744; Jan 13, 2005 at 02:47 PM.
Instructor
Joined: Nov 2002
Posts: 141
Likes: 0
From: Hillsborough NJ
Originally Posted by i885744
I really don't see what all the fuss is about. The driveshaft has U-joints on both ends. If you look at any truck the pinion angle is way way more than the angle on my vette even with the energy suspension tranny mount. I have a friend with a 78 chevy 4 wheel drive, with a similar dana 44 front axle. His driveshaft is shorter than mine with a much greater angle between transfer case and differential and he's put thousands of miles on it with no problem. I can take pictures and measurements if you want, I've put about 1000 miles on my vette setup with absolutely no problems.
Do the math. The energy suspension setup is i'm assuming 1/2" taller than stock. We have about a 2' driveshaft. So tan^-1 (.5/24) = 1.19 degrees. 1.19 degrees is nothing compared to the angles on everyday trucks. The shifter height in the car with the poly mount is actually better than with the stock mount. I'd put in your poly mount. The worst that can happen is you have to jack up your tranny and change it out for the rubber mount, takes all of 5 minutes.
Do the math. The energy suspension setup is i'm assuming 1/2" taller than stock. We have about a 2' driveshaft. So tan^-1 (.5/24) = 1.19 degrees. 1.19 degrees is nothing compared to the angles on everyday trucks. The shifter height in the car with the poly mount is actually better than with the stock mount. I'd put in your poly mount. The worst that can happen is you have to jack up your tranny and change it out for the rubber mount, takes all of 5 minutes.
