I just bought a 2000 Ford F-250 Super duty Xl reg cab with the Triton 5.4 Litre V8. My problem is figuring when I should have overdrive on and off. I know this is kind of a silly question, but I went from a 91' Sonoma 4.3 manual to this. I pull a 6.5 X 12 landscape trailer with a 36" , 2 21"s and blowers, trimmers, shovels ect................... I always drive in overdrive when not pulling, but when I am, I always finding myself worrying about it switching off and on. Any input would be very helpful, I dont want to burn up the tranny!!