GregBBRD

None of the latest production clutch discs (that I've seen) have the balance marks.

christiandk

I will do that...Thanks Dave

hacker-pschorr

You have to wonder how many of these cars have spent time running around like this adding to the mystique that these clutches are difficult to adjust / keep adjusted.

Dave928S

Exactly ... there are so many iterations of discs, intermediate plates, stub shafts, and flywheels, that I'm sure there are many cars with subtle mismatch of components ... not sufficient to stop clutches operating totally, but enough to reinforce the notion that you need to be a witch doctor, or own a magic wand, to get them working properly.

GregBBRD

BTW....I make a replacement clutch shaft out of 300M, for $395.00, which is a considerable savings over the stock shaft.

GregBBRD

The rust in the splines of your right clutch disc (in your picture) is one of the huge issues with these clutches. If the clutch hubs can not move freely on the clutch shaft, the clutch will not release properly.

Additionally, the lack of lubricant (and resulting rust) wears the clutch shaft badly. If there is any ridge on the splines on the short shaft....the hubs can get caught on this ridge and not allow the clutch to release. Replace the short shaft if this is the case.

Porsche uses their high pressure Optimoly HT (000 043 024 00) in the clutch area extensively. Not only is it recommended for the clutch disc hubs and splines on the clutch shaft, but they use it between the T/O bearing thrust ring and the pressure plate, as well as on the preload spring for the T/O bearing. Most clutches I see have no lubricant anywhere and the resulting wear is terrible. The T/O bearing pressure ring will wear halfway (or more) through the fingers of the pressure plate or tear off the locating pin and spin on the T/O bearing without this lubricant.

Buy a tube....it has many other issues....and will ensure many trouble free miles of use on these clutches.

christiandk

Great advice Greg. Thank you.

GregBBRD

You are certainly welcome.

I'm always willing to pass on whatever tiny bit of knowledge I have learned.

hwyengr

Are modern production methods creating better-balanced discs, or are they just not marking imbalances?

Dave928S

... and worth every cent! A superior alternative for DD clutches.

GregBBRD

I judge early and late production by the micro imprinting of the part number around the splined area.

Clearly, the OP has what I'd think to be a later production disc with a balance mark....so obviously what I thought isn't true.

Now I have absolutely no idea of what they are doing.....