blofgren wrote:
I really don't see where it would make a difference; would it not be applying the same amount of torque to the rear end components whether or not the front axle is engaged? The Cummins has torque to spare so the rear end will get plenty of torque any time the truck is in low range.
In 2WD all the torque goes to the rear axle, in 4WD it's split front and rear. I really don't think it's a concern, it's just a warning from the truck manufacturers. I suppose it would be pretty easy to break something by stomping on the go pedal while hooked to a heavy load on dry pavement. But most guys have enough sense to not do that. :)