I've been having trouble trying to figure out how forces going through an open differential would be resolved. In this case for example: [PLAIN]http://img708.imageshack.us/img708/9586/exampleone.png [Broken] If 200 N.m of torque was applied to the prop shaft then each wheel would get 100 N.m, if wheel A resisted this with a maximum of -90 N.m of torque and wheel B with a maximum of -30 N.m then I would expect wheel A to 'lose' 70 N.m of its torque to the other wheel, so that both side of the differential would have the same amount of resistance. However in this case: [PLAIN]http://img8.imageshack.us/img8/3879/exampletwox.png [Broken] 50 N.m at the prop shaft gives each wheel 25 N.m, wheel A resists with -25 N.m but wheel B gains some extra force from somewhere and has -40 N.m acting on it. In that situation what forces would we see on wheel A and the prop shaft? And what about situations where there is no force from the prop shaft in the first place and forces are only acting on the wheels? I've been thinking on this for a while now and have come up with a few solutions but nothing that fits for every case, I feel I'm just missing something.