I may have access to a lift tommorrow, in which case I'll be swapping in the S4 Clutch LSD I picked up. Recently I picked up some bushings which I was told were MMR Delrin Rear Differential Mounts. Upon doing some research, the only Rear Diff Mounts they make are UHMW Polyethylene.

http://www.mmr-direct.com/catalog1/RX7FC/index.htm

Three questions:

1. Are these actually Rear Differential Mounts? (See picture and dimensions)

2. Should I bother? (Not install and keep stock, which are in decent shape.)

3. Is there any kind of special maintence that needs to be done to these bushings? (Grease? Clean?)

Background info:
1987 base model 133k miles, daily driver, future autocross, removing open diff for LSD (with ~60k), stock suspension.

And the installation page, for reference.
http://www.mmr-direct.com/Tech/Diffe...ialInstall.htm

Thanks in advance!

 

I've got a set of these waiting to go on along with a Mazdatrix comp. front diff. mount. Just waiting for some freinds to help with the install.

 

I have the UHMW diff mounts on my car, and you really don't have to do anything to them. They aren't too difficult to install, and so far I've been happy with them.

 

get teh racingbeat comp front diff mount it is cheaper. and i too just ordered a bunch of mounts; MMR solid rear diff, MMR tranny mounts, MMR Subframe, AWR Rear Toe adjuster, and RB comp Front diff mount)

 

Can anyone confirm that the mounts I have are Rear Diff mounts or not?

 

while you're down there, i'd be a REAL good idea to replace the front diff mount. they love to break on fc's.