1998 Volkswagen Passat

Transmission problem
1998 Volkswagen Passat 4 cyl Front Wheel Drive Automatic 70000 miles

I dont believe it but drained the transmission fluid from the vw passat thinking it was engine oil. Topped up the engine oil as it was low and drove the car a short distance noticing the transmission was not right. I have since filled the transmission with the correct coolant, the car feels alright but what are my chances of it being okay?
October 22, 2008.

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