Thanks for the input Simon But I think I still missed the point. The steel retainers retainers push against the oil seal and the outer bearing race. and the said oil seal also pushes against the inner race i.e. stopping the half shaft coming out. However with all the forces in the world acting on the inner race and the outer race nothing will stop the rollers "floating " in and out within the bearing tracks. As you say crude as hell really. Have I missed something or are we saying that's how it is?

Cheers