[Z06] pfadt transmission mount
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
check to make sure the pads on each end are making firm contact with the cradle, there should be shims that came with the mount that can be installed underneath the pads to sandwich them in between the mount and cradle
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
Also, make sure your dampener is removed from the diff. I used 1/8" thick pad made from a cut up silicone intake connector to fit between cradle and the main center mount. I've had zero vibration in mine.
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Burning Brakes
Joined: Feb 2013
Posts: 904
Likes: 296
From: Sacramento, California
That could be your problem then. I wouldn't personally have a urethane trans mount without urethane engine mounts. If the engine mounts are soft all driveline vibrations will transmit through the harder trans mount causing more vibrations in that area and more stress at the trans mounting point. IMO, It's much better to have urethane at all 3 mounting points to tie it all together.
Steve
Steve