Make sure the fluid is to the right level. You may want to do a trans pan drop (I've never seen a car without a pan) and check out how bad the crud is on the bottom of the pan. If it is really bad then just run it till the tranny dies then put in a new one if the car is worth it. BUT since they neglected the tranny I'm guessing the rest of the car is on borrowed time with that king of mileage.
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09 Vue(95K) 2.4 4spd AT -PU 5w30 / 09 Flex(52K)3.5L PU / Moms car 04 Pilot(105K) 5w20 PP + Puro