As far as I understand it, a locker is on or off to both axles. But a limited slip transfers power between the axles. As in never powering both wheels at the same time. It does it fast enough that you don't know it's doing it. For the front, if you put a locker and only lock one side, you'll probably put alot of undue wear on the one side. In my opinion, I'd put a limited slip but the only one that I'd trust with 35's is the Truetrac. It has helical gears instead of clutch packs or cones, etc.
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