well I think I found out something about"sierra gears" and it's not good....they are really Genuine brand gears. Those are the worst possible gears to get for durability. see this http://www.pirate4x4.com/forum/show...id=154219&highlight=sierra+gears


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01 Taco xtracab V6 auto TRD white
mostly stock
88 Runner/V6/auto/31"/5.29gear