'15 rubi front axle swap into 08 Sahara

Bought a new take off axle from a 2015 jkur with 500 miles on it. Artec truss and Synergy's sleeves installed then took to regear from unlimited offroad 4:88s and factory e-locker. They said that the pinion race spun. Got ahold of the guy I bought it from is saying that I bought the wrong r&p due to the fact 2015 rubi came with 3 types of lockers. I can't find this information anywhere so is he correct or just blowing smoke?
 
Top Bottom