The way to find out which chassis you have is to go to a wheel well. If there is an air bag in front and behind a tire, then you have the RR8R chassis, if there are no air bags in front and behind, but there are 2 located underneath closer to the frame rails and axle, then you have the RR4R. You can also take your chassis build number found in the passenger front window on a tag and call Monaco Coach and they will tell you what chassis you have. They will also send you a build sheet with serial numbers and model numbers for your vehicle and a wiring diagram and whatever else you may need. Hope this may help, Happy Trails Bert
2006 Monaco Dynasty Diamond IV 42' Tag, ISL 400,(new to us), Residential Refrig, 10KW Onan, Bosch Washer/220V Dryer (previously 2003 American Tradition 40W) 2010 Chev Malibu LT
