well, based on what I've seen on v6performanc.net, some people have gone thru 2-3 V6 Trannies. I guess your only option is to get the tranny replaced, and get an aftermarket Tranny Cooler + Filter so the new tranny will last longer and run better. (B&M makes them)
You should ask this question here:
http://www.v6performance.net
I guess another option would be to get a CL-S/TL-S 6 speed swap :thumbup: