Welcome to RVing! We've owned three Scotty motorhomes. The first was a Pioneer which we only had for about a year but I can give you a little information. Ours was not a 4x4 but it did have a tag axle. After driving it around for months we discovered that the tag axle brakes were not working because the factory was not hooking them up so that they would work. So check that. While you're at it make sure that the welds holding the tag axle to the truck are good. The welds on ours had cracked and the frame of the truck had ripped from the stress. We had it fixed but it wasn't tracking perfectly after that.
Other than that we liked it and didn't have any other problems.
