[David_Hayward (RIP)]

Can I just add that initially it was thought that Ford and GM would share componentry, with one company making certain parts and the other making compatible parts. This mean for example that Ford in Windsor would produce cabs and The McKinnon Industries Ltd axles for front-wheel drive. This turned-out to be impractical given the vagaries of production, shipping and receipt overseas so GM in Oshawa started their own cab production and Ford's axle plant started their own azles/transfer cases etc.