RCV Performance Ultimate CV Axles simply replace your Jeep JKs weak Dana 44 U-joint axle shafts with a high-strength constant velocity design. Tests prove Ultimate CV Axles to be twice as strong as OEM Jeep JK shafts, and they're just as tough at a straight angle as they are at extreme angles - where U-joints are weakest. Ultimate CV Axles also eliminate U-joint binding to allow smooth transfer power to the ground. Even if you have big tires and big power there are no worries. Ultimate CV Axles are low maintenance and operate with a smoothness you can feel - whether off road or on the street. And we back it all with a "No Questions Asked" limited lifetime warranty.
RCV only offers front axles.
Here's some recommendation from G2 Axle & Gear:
Part# 196-2052-002 for 35 spline with an aftermarket locker
Part# 196-2052-032 for 32 spline for factory Rubicon locker
Part# 196-2052-030 for 30 spline for non Rubicon’s