Ken & Gary,
All 3 of my Newells had a button on the dash labled "diff lock". When it is engaged (on) the coach drive axles pull together with no slip. I have used this feature twice when I was stuck in mud. The first time I was able to "walk out" of the muddy ground with the diff lock on and both wheels pulling. It is imperative to remember to turn "off" the diff lock after the coach is freed from the mud. The system worked great!
I became stuck a second time (read dumbass) and the use of the diff lock could not get me out of the mud this time. I had to call a wrecker and with his help I was able to get out. My point is the diff lock is a good thing to have, but it has limitations.
I will never get in that situation again. If I am going to park on grass, first I walk out and inspect the ground. If it is not hard sandy earth, I stay on the concrete or asphalt.
Tuga & Karen Gaidry
2012 Honda Pilot