When i start to drive my 2000 F250 7.3. should i switch the overdrive to off and then at about 2000 RPMs turn it on? I've read different stories about wearing out trans. I also noticed today that my truck doesn't seem to rev. above 2100 RPMs. I 'll check it soon. How can i check to see it computer has been modified with a tuner or something? I just got it w/80000 miles and don't know about its previous life . It has air bags in rear springs and an energizer for trailer brakes. ( i think). It would appear that the previous owner has done mods to truck. Thanks for any help.
I'd like to turn it off when starting to roll. (Its is more responsive) And turn it on when i'm moving 45 + MPH. While i'm starting from stop, i have it off and truck gets to 2000, i switch it on, then RPM drop to 1300sh. But will all this shifting wear down my trans? I'll try to drive with OD off and see how high it revs. thanks again.
You can shift it how ever you want to. Its your truck But, the over drive is in there to keep those RPMs lower and save on diesel. Its also easier on your truck to drive it at lower RPM. Anytime you put more movement on a part, the more use it gets, so the sooner it may go out. but, if you keep the fluids good in it, you should not have too much trouble.