Whisper

Yeah, SA tranny is a bit different, but all FB trannies are the same fit, however I don't know why 84-85 crossmembers are different from 81-83 ones in the bushing department, and whether or not the two styles are interchangeable.

Rx-7Doctor

iTrader: (13)

I'm almost positive that I have interchanged the ones from 81-83 with the 84-85 ones and the 84-85 with the 81-83. Perhaps the 84-85 were a design improvement of incorporating the bushings into the mounting holes instead of having the separate upper and lower bushings since the bushings were prone to cracking and splitting apart.

Perhaps a member that may have one from the earlier 81-83 models and the later 84-85 could do a comparison but it seems that the only difference I can think of is that the earlier ones had the separate bushings.

Jeff20B

iTrader: (13)

It's a little industry term known as "planned obsolescense", just like in the '83-'85 driveshafts with their stamped in place u-joints. My recommendation to you is to find yourself an '81-'83 tranny crossmember and the rubber spacers plus all the other washers and nuts (hardware) because they NEVER seem to go bad (I've never seen bad ones unless they're oil soaked). Or go with kentetsu's mod if you stay with the '84-'85 version.

Whisper

I ordered a set of urethane bushings from Ryan Shook, hopefully I get them sometime next week.

But yeah, I can't really imagine there being much difference between the earlier and later crossmembers, aside from the bushing style, so if I ever want to soften it back up to stock I'll try the 81-83 crossmember style, since those are readily available.

Whisper

Finally got a chance to bolt everything up with Shook bushings and drove it around a bit, seems pretty decent. Everything feels solid and it's possible the tranny butt doesn't rock as much, though I can't really tell at this point. In any case I know I fixed the broken corssmember, and that was the goal.

The thing about Ryan's press-in bushings, though, is they're a bit long. Maybe 8mm longer than stock, so the transmission hangs a bit lower, but visually I can't really tell the difference, everything fits and bolts up, so I'll leave it at that for now. I don't know if crossmember could slide up and down the bushing on bumpy roads, I'll have to drive it and then check any wear on the bushings. I can always trim them if I need to.

Overall, good stuff. Thanks to Kentetsu for bringing this up and to Ryan for making the product.

Kentetsu

Hey Whisper. Don't hesitate to give feedback on that issue to Ryan. From what I understand, these bushings are either still in, or just out of, the design stage. I wouldn't be surprised if, based on your information he modifies the design and sends you a new set.

This was my first dealing with him, and he seems to be the kind of guy that wants to do things perfectly. Either way, I'm sure he'd appreciate the input.

rotor-motor

iTrader: (7)

Shook should look into this as it would save him time if they were interchangeable, he could do some r&r on which ones work the best and only produce those.

on another note, i think im going to grab a set for my 83 gs. Kentestu what type of motor mounts are you running?

Kentetsu

There are two styles of crossmembers, with very different types of bushings. A universal type bushing to fit both applications is not feasible. However, if you look at the pictures I posted it is easy to tell the difference between the two. One style is more of an "internal" bushing (newer), while the older version has the bushings mostly resting on the top and bottom of the member.

I'm running stock motor mounts. I've considered upgrading, but don't really want that much vibration transmitted to the chassis. I've already got so many suspension bushings that are either urethane or heim joint, its already kind of loud. lol. But mostly I just haven't had the time to do it, I've had a set of hocky pucks sitting on the shelf for three years now for when I've got the time to try it.

soza127

iTrader: (13)

i have a used one for sale how would you offer in really good condition.thanks

Whisper

Yeah, I told him, and sent him pics and everything, so he knows and can modify his design if he wants to, although the ones he sent me work fine so far.

Whisper

wat

Kentetsu

Please English speak you transactions conducting when.

marsredr100

Reviving an old thread....can someone provide updated information on urethane or delrin replacement bushings for the M/T crossmember for a GSLSE. I believe Shook Motorsports is no longer in business and wondering if there is another vendor or alternate option for replacement.