I just bought a 2002 PS with the 7.3 and auto trans. The transmission has a lock up switch on the dash. This is new to me. I drove the truck about 600 miles yesterday, coming home from Corvallis and used the lock up out on the freeway. I forgot to turn it off once coming into a rest area and it almost killed the truck before I could get it turned off. There were no instructions on how to use this feature. Could someone give me a run down on how to use this? I can see the benefit of having the switch...lower rpms and great compression braking coming down hills. I got 16.7 mpg on the first tank of fuel.
I would appreciate any comments you guys might have.