[Chester Stone]

This may be way off base, but I am intrigued that the ride mode works perfectly. Could it be that when it is put into level mode, the right front goes up too much thereby putting extra weight on the left rear? It this is the case, then I would concentrate on the level air bag valve on the right front. The only thing that changes between ride and level modes is the front valves which switch from the center valve to the two outside valves. Just guessing.