If it was ok before, they may have over torqued the pan bolts when the changed the fliud or not tightened them up all the way. They could have overfilled the tranny too. I once took my Mustang GT 5.0 the Jiffy lube for an oil change and they overfilled it 2-3 quarts. The engine was smoking and running terrible. I checked the dipstick and it was way over the full mark. I took it back and the drained a refilled it luckily there was no seal damage.

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1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T