You’re right! I suspect it is, indeed, a Long style PP but a phone call to McLeod would clear-up the matter.
I sent an e-mail to McLeod’s tech support and will post their answer here, when I receive it. If the part # I mentioned includes a Long style PP, I’ve asked for the part #’s of the appropriate Diagram PP items. I suspect they will recommend an 11” diaphragm PP with a Long style bolt pattern and a Pantera specific 11” disc but I’ll wait and see.
Hi stevebuchanan,
The Mcleod 75210 is a long style not a diaphragm clutch kit, I just return a 75110 kit (400 hp) to summit because I made the mistake, I think the McLeod diaphragm mechanism is the 360801 (3000 plate load) or or 360803 (2400 plate load) to be confirmed !
Good point on the clutch cover bolt pattern, David, since there are quite a few different bolt patterns and sizes used by clutch manufacturers, some of which won't fit a stock flywheel without redrilling. And this is not a backyard job due to the possibility of screwing up the engine's balance. A new flywheel to match non-OEM bolt patterns can add many hundred dollars to a 'simple' clutch job.
There are special rounded-surface throwout bearings used with some diaphragm clutches. Due to the design, if a normal flat-face throwout is used on a straight-arm diaphragm clutch, you can get a 'catch' in the clutch feel during shifting that bothers some people. The bearing needs to match the clutch type.
From Mcleod Tech:
Yes the 75210 does come with the Long Style Pressure Plate in Kit form.
We don’t offer a (Pantera) specific kit in diaphragm form.
However, kit # 75212 ((*diaphragm pressure plate + dual friction disc*) $455.00 Direct) with the (Pantera) specific T.O. Bearing 16525 ($115.00 Direct) will serve you well.
@bosswrench posted:There are special rounded-surface throwout bearings used with some diaphragm clutches. Due to the design, if a normal flat-face throwout is used on a straight-arm diaphragm clutch, you can get a 'catch' in the clutch feel during shifting that bothers some people. The bearing needs to match the clutch type.
I've experienced the "catch" Jack mentioned above and it was so miserable, IMO, that I removed the offending PP without even driving the car with it! That was a SPEC diaphragm pressure plate and it was incompatible with my Mcleod hydraulic (flat faced) T/O bearing. I replaced the PP with a Mcleod diaphragm unit that had curved fingers and the release action was then perfect.
FYI, the part # Mcleod tech recommended (# 75212) does have curved fingers, so it will work with their Pantera specific, flat faced T/O bearing (# 16525).