95 rodeo trans problem

ok here is my problem the check trans light came on and wont go off.ive checked the pos batt cable good,replaced fluid and filter no help,put in new batt 1000amp no help,took it to aamco transmissions and they said it was a force motor malfunction.does anyone here have any idea where to get a force motor solenoid? or where the hell it is in the tranny? or anyone here have the same problem that they have corrected by some other means than what i have listed? thanks in advance

ive had a 95 rodeo for a little while now. bought it with 118k on it. transmission was checked by carx and they said it was ok, but it seems a little slow-shifting to me. it doesnt redline, but it comes close, especially when i punch it. did yours exhibit these symptoms too? id like to know if im headed towards the same problem.