Spiral cut vs. Standard diff gears

[Snipin_Willy]

Originally Posted by sikeston34m

Here's a couple of pictures

The spiral cut gears try to either pull the pinion into the cup, or shove it out of the diff. See the comparison? The only thing stopping it from doing this is the bearings.

Interesting. I wonder if this was part of the intent when they started making them. Hard to imagine an engineer missing this sorta thing then a free body diagram should be the first thing the look at.