Honestly, it sounds like the transmission pan is leaking. If I'm correct and they retightened the pan, it will stay the same or get worse. I don't believe there is anything wrong with the transmission at this point. What I recommend is this. Craw under the vehicle and wipe the transmission pan dry. It is right up front, black, about 1'x1' in size. Then recheck it to see if that is where the leak is. If I'm correct, a new gasket with the trans filter will be around 20 dollars. Then you will need (aprox.) 4 quarts of ATF to refill it. I believe the 2000 takes ATF+4. It will say on the dipstick.
Let me know if this helps you.
Joe
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Friday, May 21st, 2021 AT 2:58 PM