The axles are side specific

 

well duh

 

Shouldn't be they should both be the same length I am pretty sure because the arb has centered coss shaft

 

Well the problem is the driver side does not enter all, it stays about 1/8 out .To surprise me I going to change sides if not fit ? CUT/SHOP.
For Knowledge of the people ARB 157 and Yukon Gears you need to cut the ring gear bolts just a bit [ATTACH][/ATTACH] This bolt (1/2-20X1) shows the tread damage by reaching the bottom of the ring tread
Cut about 3/16