1st thing to do is verify trans is full. If full, does it have a normal sweet odor? Is it pink in color and can you see thru it to the stick? If all thats good, then pull the trans pan and tell us if there is any residue in the pan.

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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE.