[alloysteel]

You want something complicated? Consider the Torsen differential gearing as used on the HMMWV. It worked just fine- until it didn’t. It was a bitch to fabricate, and reliability was a little dicey, as it was a real bear to overhaul, the failure usually being the pinion gear and the resulting progressive failure of the seals related to the shaft.

[Red Badger]

Yes that is very complicated..................