Originally posted by RPM
I just came in from driving the T. at 50mph with the converter locked it is cruising at 1250 rpm. With the converter unlocked about 1700. I have a 2500 stall with a lock up. The lock up will only work in OD and has its own switch on the dash. Mine could really use a 4.10 gear.
sounds like you are lugging the motor, may take more gas.