I agree with deanyel, sounds just like the symptoms I had when I needed a vacuum modulator change/adjustment.

Also, I have used a topsider to drain the transmission fluid after I stripped the allen head drain on the pan and couldnt get the drain out. Figured I would try the topsider route cause i didn't want to bathe in tranny fluid. It works really well, and if I remember correctly I got 5 or 6 quarts out that way (I still drained the TC too). But in your situation, using the topsider might be the most reasonable option.

John

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1995 E320 119,000 miles