Yep..you get recognition from me for the DTM mount from Napa..and your previous post with the pix was the deal maker....I'm going to do some more upgrades to my trans,hoping to do this year,but its all weather contingent....Once that work is done will be the answer to how well this mount will act...so there will probably be one more follow up for the site to read(on my scenario)....Glad this thread is/was here,as I used for determining my angle to my selections.....

Just glad I could find and share a good replacement besides the much harder poly and cheap $2 rubber ones... I found some "new old stock" ones, that people were asking like $100+ for, but 20+ year old rubber, I'll pass... Glad Napa made has a nice piece available... and this site we have here to share...

Do you happen to have any pictures of the mod you did? I just broke my trans mount and I really don't want to put that Anchor/Pioneer rubber mount in. I ripped through those with ease in my other Camaro. I bought one of those NAPA parts to tide me over until I can figure out how to do what you did on the poly mount.

Great discussion. It would seem the ES 3.1142 has a slight edge over the prothane 7-1604 in terms of reported excessive vibration, though you’d clearly still be rolling the dice. A bonus to my mind is the 3.1142 was designed to fit thirdgens specifically. I may give this a go along with the ES motor mounts and see which camp I end up in. :P

Thanks, luvofjah, for the heads-up on the beefier rubber Napa OE-type mount. There are a couple of others that appears to be similar:

Napa DTM 6441261/$19.79
O'Reilly PowerTorque A2672/$11.99
AutoZone Duralast A2672/$10.49 (In the note of this latter, it says "With Sport Shift—whatever that means)

JamesC

sorry no pics of the mod the poly ripped a part internaly . I tossed it but there are 2 large humps in the es poly mount I just ground them down flat as for another update after installing a softer es mount I then added a adjustable torque arm drove fine for about a month . I ended up getting an all new vibration apparently using the tq to force the proper pinon angle is not such a great idea snapped the bellhousing on trans no clue why the tail shaft didn't snap or the the torque arm mount .
well new trans and the adjustable set to exactly the angle the factory arm was no vibrations still using the newer soft es one I think its marked for 4thgens

Old thread, I know.
But that is exactly what I had to do because the extra thickness of that preload plate
caused something (I think the exhaust) to hit the underside of the body. I made 1/4"
thick spacers to go between the crossmember and frame.

Edit: after reading through this entire thread, if I do have any high speed vibrations, I
think my first step will be to replace my metal crossmember to frame spacers with 1/4"
thick reinforced conveyor belting. And make sure that the driveshaft angles are equal
and opposite.