I've owned my '95 Z28 vert for 18 years already and recently did a A4 to M6 T56 conversion. When using the OEM tranny mount, it hits the bottom of the floor pan of the car as if the mount was broken. I cheked it and it wasn't broken, and neither were the motor mounts.

I installed an energy suspension polyurethane tranny mount and it solved the problem, but those things make the car vibrate like crazy!!!!!! I went back to the OEM and the transmission hits the bottom of the floorpan.

A friend of mine told me that the T56 is much longer than the 4L60e and that the mount should be different... but the fool drives a Mustang, so I rarely pay attention to the words that come out of his mouth. Maybe we speak different languages... But anyways, anyhelp will be greatly appreciated.

 

Autozone shows different ones for a4 and m6.

 

When I did my conversion I used the mount from my auto and it worked fine. I had the T56 mount but it wasn't in very good condition. They looked identical to me. The GM parts manual only shows one part number for the 93-97 trans mount. It does have a separate number for a 1LE mount, but nothing for different transmissions.

The 98-02 mount part numbers are different than the 93-97. The crossmember for the T56 also has a different number than the 98-02 cars. I don't know if there is any difference between the actual parts. Are you using an LS1 crossmember. If you are maybe there is enough difference to cause your problem.

 

I don't understand how this is, since the poly mounts are taller than a stock mount.

When you say "it hits", what are you really saying? What circumstances?

 

Like if it had a broken mount... It doesn't do it with a Polyurethane mount.

I don't know if it has a LS1 crossmember.