96 4X4 AUTOMATIC TRANSMISSION

[RUD]

I HAVE A 1996 S10 TRUCK 4.3VOTEC WITH AUTOMATIC TRANSMISSION

THE QUESTION I HAVE IS DRIVING DOWN THE ROAD AT 1500RPM (35-45MPH)

I CAN FILL A SLIGHT SURGE IN THE TRUCK. I HAVE BEEN TOLD THAT THE AUTOMATIC TRANSMISSION IS HUNTING, TORQ CONVERTER LOCKING IN AND OUT. AT SPEEDS ABOVE OR BELOW EVERTHINGS OK. I HAVE NO CODES OR PENDING CODES. I HAVE CHANGE THE FILTER AND FLUID. NEED SOME IDEAS.

[Cop_Dodger]

Try checking the brake switch. The torque converyer disengagues when the brake switch opens. If it's opening and closing at crusing speeds it will do like you're describing.