Richard Anderson

Hello folks,

I had some chatter in my clutch and discovered that the throw out bearing was shot as well as the pressure plate. My disks are in need of replacement and I believe the center ring gear and the fly wheel are serviceable. Pelican lists a replacement clutch kit from Spec (probably not a good acronym for the southwest), SP 541 stage one that is for the 78. When I called them to inquire about the throw out bearing and if it was included, they said that they had no listing on the kit for the 78. I called Spec and they are looking into what might work for my car but need more information on the compatibility with the SP 541 and what parts might work. Soo wondering if any other members have had this problem and how it was resolved.

Mark Anderson

We have all the parts in stock to keep your 928 clutch stock if you choose that direction

SwayBar

I'd go stock and not aftermarket.

Bigfoot928

...

GregBBRD

If you can wait for about 3 weeks, I'll have my brand new single disc version done, for the early cars.

If you missed it, here's a link to the discussion about my dual disc version:
https://rennlist.com/forums/928-foru...ct-clutch.html
The dual disc is butter smooth, but way overkill for a stock car (holds 800 ft.lbs.)

808c2s

Have you looked at 928Motorsports clutch kit?

Petza914

I would upgrade to the 83 style dual disc clutch if staying in the 928 family and use stock friction discs. This version is a lot more robust than the early cars used. The ideal scenario is Greg's new single disc clutch, which is what I'd really like, but can't afford with a working SPEC clutch in my car right now.

islaTurbine

If you haven’t already, check out my recent thread concerning my ‘78. https://rennlist.com/forums/928-foru...s-1978-ob.html There might be some relevant info in it for you.

I got really lucky and was able to find a gently used pin-centered flywheel and intermediate plate off of eBay for $275. Greg’s solution might be your best bet depending on your budget and how long you plan to keep the car.

Also be aware that the 928 WSM states that the intermediate plate and pressure plate are not serviceable items; only the flywheel can be skimmed for reconditioning.

GregBBRD

I haven't discussed this, but because the early clutch doesn't require trigger teeth on the flywheel, it only has one clutch disc, and I can use a simpler (cheaper) off the shelf T/O bearing, my "target point" for the "early flywheel/single disc clutch is $3250.

Not as cheap as a couple of "Spec" clutch discs, but that's not really comparing apples with apples, of course.

Apples with apples is a different story:
The typical "early" clutch replacement, these days, requires a pilot bearing, a flywheel, a flywheel seal, flywheel bolts, two clutch discs, an intermediate plate, a pressure plate, a clutch shaft, two coupler bolts, a T/O bearing, a T/O arm, a T/O pivot ball, a hydraulic feed hose, and many times a clutch slave.
Try buying all of that stuff, for $3250....
Of course, a new intermediate plate and a new flywheel don't exist, so you are going to have to try and source those pieces used, if you need them....and then be fortunate enough for the used intermediate plate to have "H" stops that properly function, so the "replacement" clutch releases properly.

I've been doing these clutches since 1980, when the very early 1978 clutches broke off the pivot "pin" (3 different versions of that piece, since then.) I've had these clutches in an out, multiple times, to try and make them release properly. And I completely understand that probably a full 50% of the synchro damage/wear inside the early transmissions is the result of these clutches not releasing completely.

I've been there and paid the price, along with my clients, many many times.

These dual disc clutches are, even being generous, a nightmare.

Trust me, if I could have had a viable alternative, even as far back as 1980, I would have been all over it.