One great thing is the support available from Winnebago- on line. There are an almost overwhelming amount of detail as to as built, dimensions, where wiring is located and wiring diagrams. This kind of help is rare and a great help in keeping mature motorhome running, especially for DIYers. Both the engine and transmission are hard to kill. The Allison has a specification to upgrade the transmission fluid to synthetic Transyd (T295) or equivalent approved specification. Get it all inspected for both mechanical and and camping equipment by certified technicians, once you settle on business matters of purchase-make the inspection the last "subject to" in the purchase. There are a number of check lists on line that are useful as reminders. We all sometimes forget the obvious potential deficiencies. Good luck.
2002 Monaco Diplomat 36PBD, Avalanche toad, Glastron MX175 , X5 BMW, Almost enough toys, 3 dogs. 1 longtime wife(48 yrs)