Originally Posted by
justpoet
Regarding composites:
Most people like upgrading to steel or aluminum, but this adds weight along with durability. That being said, many other manufacturers also use composite cross pins (they're not really taking much in the way of force), and some even use composite gears. While time will tell if these hold up, I don't see a specific reason why they shouldn't.
I would think that cross pins see a large amount of force. Especially the thicker the fluid is. Under full acceleration all the force in the center diff is being put on the cross pins is it not? Correct me if I'm wrong but if those pins were to sheer off, the diff housing would spin but not the out drives. I just don't see the advantage of a composite cross pin, give me steel.