So it sounds like my wife is letting me put in a pr44 since I broke my dana30. yay. Now, I'm working with a jeep shop whos letting me buy my own parts to save on the install cost. Which leads to me becoming a bit confused.

I have a jeep unlimited sport. so a dana44 (non rubi) in the rear. I want 4.88s, and I want an arb locker. That part seems pretty simple (except for the arb locker having one size for 3.73 and down and one for 4.10 and up). the issue I'm seeing is spline count. In a perfect world, I would upgrade my rear shafts now too. I see upgrades for the rubi and non rubi shafts (30 and 32 spline), but it looks like the arb comes in 30 and 35 spline? I guess what I'm getting at is, to get 4.88s what size locker do I need, and can I do 4.88s with an arb with a 30 spline axle, and then get 35 splines later? or any type of upgrade later? is this a good idea? or should I do all 35 spline now?

right, that was a lot of rambling. I want 4.88s in the rear, with an arb locker, and some beefy axles. anyone want to point me in the right direction?

 

I would suggest getting an ARB 30 spline. A spare if ever needed would be easy. To have a 35 spline shaft would require a 35 spline ARB. Good luck with the build.

 

The rear non-rubi uses 30sp shafts. The rear rubi uses 32sp shafts. If you want to move up to a 35sp arb, you must move to 35sp shafts also. (for the rubi guys, the 35sp route is the only non-factory locker option. Non-rubi has lots of options). If you stay with factory shafts, then you want the 30sp arb. (I believe you want the 3.73 dn with JK gears, but double check that.)

If you are doing shafts + arb, you might just look into saving a bit more and swapping to a d60.