Towing - Stay in RWD or change to 4WD?
We just purchased our first camper this past Monday and we are making our maiden voyage tomorrow. Our tow vehicle is a 2013 Expedition EL and it has an option for 2WD, 4WD Auto, 4WD High, or 4WD low....
Forum Discussion
Some of the above comments assume that the 4WD system locks the wheels to the same rotation. But different 4WD systems from different mfrs have different ways of working. I can see from the Ford brochure for that year's Expy that its 4x4 auto mode would be fine to run on the highway. I can't tell offhand if 4wd high engages a differential lock or not. 4wd low definitely would not be appropriate, as it is not for highway speeds.
My Lexus GX470 has full time 4wd, and splits the power between axles all the time. That is its 4wd high. 4wd low gearing limits me to about 35 mph. Then there's a separate diff lock button for the tough spots. But like I said, every mfr does things a bit differently.
My Lexus GX470 has full time 4wd, and splits the power between axles all the time. That is its 4wd high. 4wd low gearing limits me to about 35 mph. Then there's a separate diff lock button for the tough spots. But like I said, every mfr does things a bit differently.
