The situation and configuration in our 2005 24' Class C is about identical to what bobndot described their earlier post above.
We don't have a 4X4 setup on our Class C, and it doesn't even have limited slip internals in it's rear, and only, differential. However, note that a Class C has terrific traction in it's rear drive wheels due to all the weight that they're carryinig back there ... i.e. way more traction than that of my open differential 2WD Mustang that - years ago - I used to take on the slippery roads and into the ski slope parking lots in Utah ... very carefully.
