I have an ATX tranny. Some say they will and apparently have done it with modification, others say they won't AT ALL!! Road Race engineering states the below;

"They are different on the auto and especially on the NT AT motor. They would
not work. There is too much air gap. You may want to do the urethane fill
mentioned on our tech tips page.

Mike W "

I trust their word but am curious how you guys whom say they fit got them to?? Drop me a line and hook a brotha' up! I just don't want to spend hours on that B&%@ch of a rear mount to find it won't work, even after shaving 1/4 inch of each side of the insert as some of you stated is the cure! HELP!
:shrug

i believe the correct answer is the front will work but not the sides....not sure about the back. At least, thats the experience I had with them in my ATX.

The front will work but the back will not.

The front works with a little shaving... make sure to use the big metal washers.

The back simply won't work. The little fingers are too close together, you'd have to cut them off almost completely.

I have a set of fronts for sale, no washers, $10 shipped.

The fronts will work with zero shaving imo.

I didnt do anything to them. The rear will not fit because the auto trans is heftier than the manny trans and needs the added support from the mount.

That is why you have to shave off some of the mount itself for using it with an auto.

Just put the front one in, it is the same as the manny trans. And you will notice a nice difference in power.

Thnaks. I will use the front!!