I need some help.
I bought a rear end and it was supposed to be a Eaton 19050T. Come to find out after the fact that it is a "17200" rear.

Did a little looking but found VERY little on these rear ends. I did find out that it is either a 17201 or a 17221 (not sure of the difference, won't know for sure until it arrives which one it is).

But there seems to be almost nothing on these rear ends on the web. How can that be?
Any help on this would be appreciated.

I'd like to start with some basics like ratings and measurements.

Thanks.