There are no more ring and pinions for the 11-12-13 models. The discontinued them when they finally came out with a updated rear diff. The new diff bolts right in. But no clue if the ring and pinion are usable in the older housing. But by the time you rebuild that one you would have had over 400$ in that hand grenade. New diff between 650 and 700 depend on how much you dealer cares for you.
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