The car is a conversion from automatic, yes? It sounds like the transmission, flywheel, pp and throwout bearings all must be matched together and it seems if one is wrong in the mix you might be in trouble. It sounds to me as if you have one element wrong. Could be pp or t/o bearing....

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

The only thing left from the automatic would be the the adapter at the back of the engine. Looking at an excellent writeup from this site on this subject, the adapters appear to to be the same, even sharing the same parts numbers.

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1979 240D with a 617 turbo diesel.

OK another update. Today i sat down and played with the clutch fork and throw out bearing, sliding them back and fourth on the shaft of the transmission.
It appears that the fork was catching on a washer on one of the bolts that attach the bell housing to the tranny. This happened because the holder on the fork (opposite side from the slave cylinder) was bent out of shape and caused the fork to bind on the washer. I put a fork on that was not damaged and it no longer got hung up. I installed the transmission and the throwout bearing now moves back and fourth as it should. I am gonna finish bolting it all up tomorrow, and have my fingers crossed.

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1979 240D with a 617 turbo diesel.

Good Luck

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1982 300DT *4-speed*// proper 617 donor for conversion // W126 big brakes // front wagon swaybar // european lights & bumpers // rear headrests // lumbar support // warning triangle // overdrive water pump pulley & 9 blade fan // Too many more to list Dark blue/ Palomino.

1983 300D euro no longer a 4 speed. . swap/parts carr

Fixed it! she no longer slips. It is such a fun car to drive now. Thanks for all the help guys! I love this forum!

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1979 240D with a 617 turbo diesel.