So, what's the fix for our slave cylinders?

[curtis73]

That doesn't happen, with or without SAC

The pressure plate's fingers/springs are always the same distance from slave and in contact with the throwout bearing
That never changes
Inside, the pressure plate can move in and out to engage and disengage pressure on the clutch disc against the flywheel
SAC pressure plate just stays closer to clutch disc as it wears down

Can you explain more? I thought that it was simply a function of the slave cylinder position as the clutch wears... just like a caliper as a brake pad wears. The piston remains further out in the bore and more fluid flows into the master piston as things wear.

 

[RonD]

Can you explain more? I thought that it was simply a function of the slave cylinder position as the clutch wears... just like a caliper as a brake pad wears. The piston remains further out in the bore and more fluid flows into the master piston as things wear.

No, the hydraulic clutch system doesn't work that way
The pressure plate case and its "fingers" are at fixed distance from flywheel and never change, slave and throwout bearing are also a fixed length

The expanding slave also has a fixed movement, about 1/2", so not much movement, which is why any air in the system causes a problem, if you only get 7/16" movement clutch disc can rub

Applying pressure on the "fingers" pulls the pressure plate back, allowing clutch disc and input shaft to spin freely and hopefully slow down to 0 RPMs if you are stopped, so you can get it into 1st gear which is at 0 RPMs
But any rubbing on the flywheel or pressure plate, which are spinning at 700RPM(idle), would make it hard for the 4" synchro gear to slow and stop the 10" clutch disc from spinning

Outside case of Pilot bearing is also spinning at 700RPM, inside is on input shaft so this bearing can keep input shaft spinning if it is binding at all, making it hard to shift into 1st when stopped