Originally Posted by MarkNog
Knowing your axles in the jeep word is essential. I would take a look under there asap.
Either way... zip locker rear, aussie up front is about 1k. An ARB in the rear is gonna run ya a little more.
Don't forget though, full case lockers most likely need to be installed by professionals as your backlash needs to be checked and possibly re-done. If you are spending the money to go with a full case locker, it's not a bad idea to do a regear at the same time.
Personally if you are lucky enough to have the D44, I would get a rear locker, and regear for those 33" tires (F&R), and throw a lunchbox up front unless you cant swing the front locker at that time.
If you only have the D35, I would try getting a lunchbox for the front and leave the rear alone for the time being. See how much the front locker helps, and if you find it necessary to lock the rear as well.