Opinions needed: Clutch slave cylinder operation

[?Waldo?]

[AndyBees]

Ah, looks like the machine shop did mill it....

The dowels come out easy for that purpose!

So, now, why is your clutch slipping?

Good point Waldo?

So glad you cleared that up, but I doubt the difference could ever be discerned. However, a shop not addressing both would be somewhat inept.
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'84 Vanagon Tin-top, ALH TDI. 1989 Tin-top
1983 Air-cool, 225k miles, 180k miles mine. Seven trips to Alaska from 1986 thru 2003.

[Wasted youth]

To clarify; the machined flywheel you see was the same one from last night, but I had it resurfaced this morning.

I do not know why I feel a slipping clutch, and I won't know how this will unfold, either.

[Wildthings]

[Wasted youth]

If it’s not a slipping clutch, I don’t know off hand what it could be. It does not have the pronounced traits of bad slippage, but mild slippage coming into 1st and mid range through 2nd. If I am very mindful of clutch action, I can almost always avoid it.

None really ever in 3rd or 4th. None in reverse. Engine RPM sort of fluctuates during the slippage.

No different if heavily loaded with family and luggage, or light with just me. Hills and grades does not affect.

I was later thinking fuel/demand so I changed the filter. Clean fuel came out of filter. No specs or crud. Last time I measured fuel rail pressure it was 36 with regular vacuum line disconnected and 32-33 with vacuum line attached, as I recall.

Could this be an AFM issue? Worn tracking?

[AndyBees]

Clutch slipping will always show-up in the top gears (3rd & 4th). I'm not saying it will not slip in the lower gears... weight and local circumstances would be a factor.

The OE diesel flywheel/clutch (freshly milled & new disc and plate) began slipping with my TDI in less than 5k miles. 4th gear was where I first noticed it. But, never in 1st & 2nd gears.

I installed a G60 Flywheel/Clutch set-up. No more slipping.
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'84 Vanagon Tin-top, ALH TDI. 1989 Tin-top
1983 Air-cool, 225k miles, 180k miles mine. Seven trips to Alaska from 1986 thru 2003.

[Igeo]

Perhaps we do need clarification. It seems like the engine and trans was out of that thing before I could even read the post...... When you apply throttle, the rpms rise but the speed doesn't is pretty much the description. Driving up a freeway grade in 4th is a common time to experience clutch slippage. You mat the gas pedal and the tach zooms up but you don't.
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1987 Westfalia 2.1 WBX Manual

[Wasted youth]

Does this piston travel look correct?


Link

[Wildthings]

[Wasted youth]

Holy crap. I never noticed that. Okay, I’m on it. How about the slave / lever action. Does that look right?

[?Waldo?]

The movement of the mount looks normal to me. They all seem to do that. I'm not sure about the total throw of the lever. Looks about right but I might be wrong about that.

[Wasted youth]

I verified the bracket for the slave cylinder. No cracks or missing/loose hardware. Short test drive went well.