Jimchev16

Ok. I know how to turn off the Grade Brake function (holding the trailer button down for 5 sec) to avoid high RMPs when rolling downhill with a trailer load.. But if this is disengaged...does it still help avoid using the overdrive gear when riding the hwy? I do NOT want the overdrive on when pulling a heavy trailer, but must get rid of this annoying Grade Brake - down hill downshifting and burning up my engine at 4500RPM. I have a brake controller with trailer brakes I would rather use instead. Avoid the overdrive gear when pulling a trailer, but at the same time be rid of the Grade Brake Function...?