I'm upgrading my gears to 4.88 and want add lockers at the same time. I have the usual D30 Hp front and a D44 rear. I would like to go with a Eaton E-Locker in the rear, but I can't get a hold of one. I'm tired of waiting so I'm looking at the other options. My rig is a DD so I want the opinion of turning the locker on and off. I was wondering, those that have the ARBs, how often do the seals go out. And what envolved when you have to replace the seal.