If it's already slipping you haven't much to lose.

 

nope alot of times trannies are misdiagnosed the filter is sometimes the only problem it has it is bad to change the fluid in a good operating tranny with black fluid though

 

Well Ive got a 1 year warranty from the SOBs down at aamco, so Im going to have to take it down there, and have them check it out. It was just rebuilt, so I don't think the filter is clogged or anything.
Ill let you know what it is....