When I am using the cruise on the highway, I will lock out the od when I get to a hilly section, because it will downshift and floor it to get up the hill if i don't. In town I lock out OD so the tranny stays in third gear, instead of going in and out.
The plugs and wires are new, and so is the TPS.
I really need to either sell the truck (and get hosed) and get a 3/4 ton
change the rear axle (or gears) for more torque and add airbags in the rear for towing my Jeep.
I really hate working on this truck, but it has served me well. I work on trucks all day (big trucks), and this thing is like a bad college roommate (slobbers, drinks a lot, looks like crap).
I will keep an eye on my truck and see if anything gets worse, I will also try driving around with the OD on and see how much of a difference that will make with mileage.