Carpokes Porsche Forum

On my 86 944 turbo, I had the clutch pedal do the classic 3/4 drop. Fortunately, I was not far from home and was able to engage the clutch enough to shift and get back home. In looking at my records, I discovered that I replaced both master and slave cyls along with rubber hose in 2018. I took the master cylinder out today and installed a new unit. The old one was leaking fluid.

My question is should I go ahead and replace the slave cylinder, too, even though it is only 7 years old. The brand I just purchased and also in 2018 is FTE. Clutch was replaced in 2014.
Thanks,
Lee

I'd replace the master, slave, and hose together. When I first got my car, I changed the master when it failed. A week later I changed the slave when it failed. And the week after that I changed the hose when it failed. The car was about 12 years old at the time...

Tom wrote: Sun Sep 21, 2025 7:33 pm I'd replace the master, slave, and hose together. When I first got my car, I changed the master when it failed. A week later I changed the slave when it failed. And the week after that I changed the hose when it failed. The car was about 12 years old at the time...

Pretty much the same here - replaced the clutch and the master failed a couple of weeks later. Replaced master, slave and hose

Thanks for the input. It is disappointing that the replacements only lasted 7 years. Doing the slave and hose is not much more effort since I already completed the master cylinder.
Lee

Timely post. My pedal went down 3/4. I was also able to make home with just enough pressure to change gears.

I have the front on stands. I do not see any leaks underneath the car or inside the cabin. Can either cylinder fail without leaking? Could it be air in the line and I just need to bleed the system or is that wishful thinking?

I changed both out about 4 years ago with FTE brand. Is it worth getting OEM for longevity?

The leak from the master cylinder can be sneaky. Look closely at the rubber boot that the rod pokes out for wetness and squeeze it slightly to see if fluid drips. The fluid can also wet the carpet and not be readily visible. I thought about Porsche original but at 3-4x the ATE/FTE price, I can’t change it a few more times and still be ahead of the game. Most aftermarket suppliers (Pelican Parts, FCP Euro, maybe others) are now offering lifetime warranty, so if it craps out in the future my replacement cost is significantly diminished.
Lee

You’re right about the cost. I went ahead and ordered FTE for both cylinders. I figured the pedal dropping that far it’s most likely one of them failed.