I'm sure the fault is with Winnabego. Have the dealer have the coach 4 corner weighted. Probably find a large difference between the passenger side and driver side. Had the same type of problem; a nearly 900 lb diffenence. Had leaves added to the right side since the loading was within 50 lb of 1/2 the axle rating. Fixed the lean, unit tracked better but also had an alignment done. JM2¢...
Ted Fulltiming in the DreamCatcher a
2008 Challenger 371PE on F53 w/ 2010 Cobalt
R'V there yet?