Dana44 hd
 

Hi all.
I have question about rear axle.
my axle is dana44hd 2009 open diff 3.21 ratio.
I found rear diff from 2020 JL Dana 44 comes complete with factory locker and 4.11 ratio. I understand ratio how that work and yes I know need to do front to.
But my question is: will this fit to my jeep, can I just take old diff out and swap with JL one.

https://cimg9.ibsrv.net/gimg/www.jk-...8b0085432.jpeg

Aren’t the axles different on a JL?
Asking, not telling but I think they may be and that could be an issue, maybe
Thinking my post might get someone who knows to post