hmmm.... I wonder how he gets away with it. He must be on uneven and slick surfaces the whole time. Most of the time, If the roads are fine to travel I'm in RWD. When the roads are still bad, it may call for 4 high. When I get to an account I will open up a lane and start in 4 high if that is what I was in on the road. Then, once I have a place to get a footing, I pop it back into RWD. If your tires are on dry pavement _or mildly wet or less.... NEVER be in 4WD period. Four low is the best way to mess some drive components up and start overheating things (tranny). ALWAYS watch your gauges. In every car you ever operate, because it may save your life some day. I never go anywhere without making sure my car isn't overheating. I watch it more on a plow rig. I have to replace my CV's and some basic wear and tear on my 2001 k1500 Z71 but it is the first time since it was new (and im at 81K on it). So in all, it was not bad. I don't even know when to use 4 low.... I have only used it once... and that was to pull a half full diesel fill tank that was bolted to a steel plate off of the ground at my facility to sell. That was really the only time I've ever used it in 81K miles. I'm afraid of breaking front end parts in 4 low when I get stuck (which has been a couple times only). So I just try 4 hi... then RWD then I rock it once or twice after putting traction aid down. If that didn't help then I call for a pull with my tow rope... not worth being impatient and breaking something... and I hate to rock it cause the tranny so I try to avoid that too.
IDK are there any 4WD component experts cruising? All I know is my experience since 2007 doing this.