[Vwdiesel] Clutch slipping?

[Bud]

I'm sure it is but it's really odd.  I've done the third gear test
where I rev the engine a bit, let the clutch out slowly with the
parking brake on and I stall the engine.  Can even stall it in reverse
and 5th.

Seems though when I'm going up hill the engine rpm increases when I
give it more throttle but the car doesn't move any faster.

Never dropped a tranny before, can I use just a regular floor jack?
Make a wooden cradle?

I've got 260k on the car, don't know if the previous owner did a
clutch before.  I put 110k on it.

Thanks,
Bud