1 0 GMC Differential Part for a GMC 8.6-3.45 Recently Updated $225.10 USD RING PINION GEAR SET GM IRS 8.635 RATIO 3.45 REAR, 11 PINION TEETH , 1.87 IN PINION SHAFT , 32 PINION SPLINE, 10 BOLT RING GEAR , 8.6 IN RING GEAR OD , 38 RING TEETH ConditionNewRear End3.45 ratioFits To Make(s)GMCFits To Model(s)8.6-3.45Stock NumberSST G886345 MLS Number10835139CategoryDifferential Misc. Parts Last Updated10/19/2025 LocationPortland, OR, US Sold ByLKQ Heavy Truck (855) 905-___ SHOWNUMBERCall Seller Email Seller Save More Info