12B331 - 12 Bolt 3.31 P/S Gear -- US Gear - Moser Engineering

12B331 - 12 Bolt 3.31 P/S Gear -- US Gear High Quality Gears Made With Pride In The USAUS Gear, a brand of AxleTech International, manufactures high performance ring and pinion gears in Chicago, Illinois. For over 50 years, racing professionals and performance enthusiasts have trusted US Gear as the industry standard for high quality aftermarket gears.US Gear high performance ring and pinions deliver the highest quality in the industry with quiet performance, clean installation and setup, durability, and longevity. Ring and pinion gear sets are available in many ratios for GM, Chrysler, Ford, and Dana differentials.US Gear specializes in advanced engineering, manufacturing technology, and precise heat treat processes. All manufacturing processes take place in its Chicago-based facility. US Gear also manufactures gears to support the AxleTech product line for commercial heavy-duty vehicles and defense applications. SPECIFICATIONS Material 8620 - Standard OE Material Ring Gear Diameter 8.875" Ring Gear Bolts 12 - 3/8"X24 RH Cover Bolts 12 Carrier Breaks 2.76 / 3.08 - 3.90 / 4.10 Pinion Shaft Diameter 1.625" Spline 30 Ratio 3.31 Tooth Count 13-43