I'll be re-gearing my Rubicon to 5.13, and I was thinking of upgrading the Rear Locker at the same time. I'll be running 33's for now, and then upgrading to 35's down the road. The first option I was considering was using a Rubi Front Locker along with stock spline count alloy shafts. The second option was using an ARB with either 33 or 35 spline shafts. Another option would be to just keep the stock rear locker and upgrade to stock spline alloy shafts. The jeep is a DD, and I wheel once a month, with most of the terrain being easy to medium grade. I am more concerned with strength and durability. I use the jeep for fishing, and I often go alone, so I need the Jeep to be bulletproof.
If I go with the ARB, would it be possible to use the factory switch?