hey trannyman by reading all the comment u diff seem like the person to ask questions, so i would like to ask u a ? ok so i have a 2000 grand prix gtp with a 4t65e code oxab tranny last week it started to slip and whine so right away i changed the fluid and filter after that it ran fine for 2 weeks and now it is doing it again, it whines at all time idle park, no matter what gear, last time i drove it it started to slip till the point of no movement as like i had in neutrul, i shut the car for not even a second and it drove fine for a couple of miles and started to do it again, what could it b i here about people pouring additives in the tranny, do u think that would work? if so then what? or should i just get a new tranny