Just because the slave cylinder was replaced two years ago doesn't mean the slave hasn't gone bad, just less likely it has. Did you simply look at the return spring or did you check it to see if it hasn't weakened/stretched? Is there a zerk at the clutch fork pivot point, possible that that lever may be binding/sticking. Also possible that the hydraulic line to the slave has begun to break down like an old rubber brake line (if the supply line is rubber), the interior could collapse which would restrict the return flow of hydraulic fluid. Also check the pedal pivot point up under the dash, make sure it is moving freely.

Check out all the easy to get to things before jumping to dropping the tranny. I've driven manny trannies for many, many years, and have never had a throw out bearing stick and cause what you describe.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.