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12 Bolt GM Truck, 8.875” Street Gears, 1.700” deck height
Category: Ring & Pinion Sets
Part Number(s): GM 12 Bolt Truck, 8.875”, 8620, 3 series
Fits 3 series carrier (original ratios of 2.76 – 3.42) with 1.700” distance from bearing shoulder to ring gear flange (deck height). 8.875” ring gear diameter, 1.437" dia. pinion stem, 30 spline pinion. Manufactured from 8620 alloy. These gears are used primarily for street, oval track, and lightweight drag racing applications.
Price: $223.12
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12 Bolt GM Truck Installation Kit
Part Number(s):  83-1018
Installation kit contains all the parts required for a complete ring and pinion installation, including pinion and carrier shims, pinion seal, crush sleeve or preload shims, ring gear bolts, pinion nut and washer, and cover gasket along with gear marking
Price: $122.96