i replaced the tranny in my 97 sunfire 3t40 with one out of a 99.. it shifts fine and everything but its leaking really bad.. i cleaned everything up and started it up. within about one min it started leaking out of the bell housing.. i was thinking mabee the seal around the convertor.. but someone told me mabee a pump bushing.. ive looked around and its hard to find info on these trannys.. thanks