ricks99 wrote:
Regarding the advice to use a lower gear... should I manually go to 2 or L (I have an automatic) or keep O/D off and let the transmission handle things itself?
Keep it in Tow/Haul mode. Listen to the engine on the uphill pull. If you hear it up-shifting, then down shifting again it's 'hunting' for gears. The ECM programming tries to make the engine run efficiently (aka lower RPM), but all that up and down shifting creates heat in the transmission.
If you hear it hunting, use the shift lever to lock it in the lower gear. Whether that's 3, 2, or 1 depends on the incline. Don't worry about going fast....this is truly a tortoise and hare scenario....slow and steady wins the race. Pay attention to what gear you're in and on similar downhill runs manually shift into that gear to maximize engine compression braking.
DO NOT ride the brakes. The reasoning has already been well explained. Coming down Teton Pass we were about choked out by hot brake smell. There was a Class C motorhome that was riding his brakes all the way down the 10% grade and he was smoking the front rotors. How do I know? I watched his brakes lights stay on almost constantly and I could see smoke rolling out from the front fenders. :S :h
Use the engine and lower gear as much as possible. Use the brake pedal to scrub speed then let off. This method will keep you in control and will not overheat the brakes.
KJ