94 auto trans problem
 

I've got a 94 3.8 auto. Problem is at crusing speed, 40 to 50 trans seems to come out of gear or is trying to downshift. Fluid is good and changed filter about a year ago when problem started. Only does it intermittently. Someone told me it was the electric switch on side of trans that tells the computer what gear its in. Doesn't set any codes (Ihave code checker but not scanner) Anyone run into this problem on AODE before.