Tow Haul.......When?
2003 GMC 2500HD pulling a roughly 11,000 LB 5th. Would you leave it in Tow/Haul on flat/level highways? Or do you put it in t/h and leave it?
Forum Discussion
Hoppypoppy wrote:
Help me understand.....if I am in T/H, I can forget about the "O/D Off" feature? The T/H will automatically make whatever shifts are necessary? Also did I understand correctly that the Allison will not kick in if O/D is off??? Trucks 12 years old and I am still learning stuff. Love it!!
You can still use O/D off in T/H mode. One consequence of T/H mode is not only preferring a lower gear longer, it will also wait to downshift to minimize hunting, i.e. you can "lug" longer in higher gears. If you find yourself in O/D on a long light grade and don't like how far you have to push the pedal, instead of pressing down more to cause a downshift you can just click O/D off and leave it that way if the terrain means you likely won't need it for awhile.
The computer can only do so much with what you're currently doing. You have the advantage of knowing the upcoming terrain. Leaving O/D off can further cut down the number of shifts in rolling terrain.
