OEM Ring & Pinion set for GM 8.5" & 8.6" in a 3.08 ratio.
Original Factory gear for GM 8.5" (not ABS) in a 3.07 ratio. Two-step - face to flank set-up only. OEM gears are recommended for quiet applications where noise may be an issue. Factory gears are the quietest application available on the market and often c
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