I asked that question at an RV show last year when standing in a monster diesel-pusher RV since it had air brakes. Salesman said nope, since it's a private coach anyone can drive one. Frankly that concept is a little scary to me. I help drive my bud's 32' unit from Pittsburgh to Charlotte...
Not in the front. You will need it in the rear if the rear has a limited-slip. Some gear lubes like Mobil 1 and I think Valvoline Synpower claim they have friction modifier in them already but it wouldn't hurt to add it anyway.
I'm big on changing fluids. Generally I use Mobil 1 ATF in my transfer case and the manual tranny in my son's Mustang. A while ago I tried Redline D4 in the Mustang after reading good reviews on it. The car did shift a little better. Had some left over so I put it in my transfer case. Last...
Here are a couple I found at an RV show. If you like more than a tent but don't want a trailer. Double check the width in bed but both manufacturers say they will fit mid-size trucks like the Ranger.
Rayzr. I was in one of these at an RV show. Not bad for the size although it's heavier...
Ryan's buggy on right, new guy on left.
Will, Ryan, Jim.
Cool old Land Rover.
Bobby's Ranger-ish sorta thing.
Lessee, will the diff clear the rock or not?
One of these things is not like the others.
The Loan Ranger.