What transmission fluid did you use when you swapped fluid? I've heard that Dexron IV can cause some problems (especially in reverse) with our transmission. The Dextron IV bottle will say that it's compatible with dexron III transmissions but ours are apparently "picky." If you used IV, I would start by doing another fluid change with III and seeing if that helps. Otherwise I'm not sure about fixing one part of a transmission for less $$. Good luck!!