Transmission mount options Options

[john77]

I need to replace the bushings on my transmission mounts, but after doing a little research I realize, as usual, there are more options than my tiny mind can handle. The car is an AX/street car that I'm slowly modifying with AX in mind.

So far I've found what appear to be a couple of stock replacements at AA:

http://www.autoatlanta.com/Porsche-Transmi...1437502500.html

Semi-solid mounts from WEVO:

http://www.wevo.com/Products/ChassisProduc...TransMounts.htm

And solid mounts from Patrick Motorsports:

http://www.patrickmotorsports.com/part/914...sion-mount-set/


Anyone have any experience with any of these? Other suggestions? The car will still be used on the street, so am I right in guessing solid mounts might not be the best option?

Thanks
John

[pcar916]

I ran solid mounts for about a year. Then changed big black plastic blocks sandwiched between aluminum bosses. Several things to report on the experience.

- I think solids are too hard on both (unmodified) mounting points and the powertrain
- If you really plan to run on the street too and your sound deadening material (~45lbs in my car) is gone prepare for huge noise
- I also had to re-torque the mount bolts often, especially with the large black plastic units because they would constantly compress. When I called the manufacturer they said they'd never gotten any complaints like that before... right. I have no data to prove it but that I was the only one to experience compression is unlikely.
- There was no shifting difference between these and what I've described below

I've used Porsche 911 "sport mounts" since I bought the car. They're the same dimensions as normal 911 mounts but are stiffer rubber. They were used on Cabriolets circa 1984 - 89 as well... maybe earlier, I never looked into all of the applications.

I'm not near the computer that has those part numbers, but a quick internet search or a call to Stoddard's or Rich Bontempi in Redwood City, California will solve that... or someone here will tell us!

Oh yes, of the three you listed the Wevo would be my choice, but I wouldn't be surprised if the Porsche sport mounts are nearly as stiff.

Good Luck