Our 378 will lift a tire almost every time we level. Does it hurt it, no. Will it roll off the jacks, no, if you set the emergency as you should. I see tires lifted on class A units all the time, it is a fact of life. Our book says to not use the jacks for changing tires, etc., as it can torque the frame if it is in an unlevel position such as a road side breakdown situation. It also indicates that raising a tire in the leveling operation is aqcceptable.
JimF, CWO, US Army Ret, 100% DAV
2011 Georgetown 378TS
2008 Dodge Caliber Toad