Differential Ring & Pinion Motive Gear GZ85370, For GM 8.3" Gear Ratio 3.70, 10-Bolt, 32 Spline, 10 Pinion & 37 Ring Tooth - Fits Pontiac G8, Chevy SS/Caprice (2008–2017) Replaces OEM Performance Sets

More about this item : Differential Ring & Pinion Motive Gear GZ85370, For GM 8.3" Gear Ratio 3.70, 10-Bolt, 32 Spline, 10 Pinion & 37 Ring Tooth - Fits Pontiac G8, Chevy SS/Caprice (2008–2017) Replaces OEM Performance Sets

Short Summary: The GZ85370 Motive Gear 3.70 Ring & Pinion Set is designed for GM 8.3" IRS differentials found in high-performance sedans such as the Chevrolet SS and Pontiac G8.

Crafted from heat-treated 8620 steel, this set delivers durability, quiet operation, and a precise fit for performance or street use.

Key Features Gear Ratio: 3.70 Differential Fitment: GM 8.3" (IRS Rear) Material: 8620 Heat-Treated Steel Ring Gear Tooth Count: 37 Pinion Gear Tooth Count: 10 Pinion Spline Count: 32 Pinion Shaft Diameter: 1.75 Inches Ring Gear Bolt Count: 10 Rotation: Standard Carrier Type: Dropout Style Vehicle Compatibility Fits GM 8.3" independent rear suspension axles in the following vehicles: Pontiac 2008–2009 Pontiac G8 Chevrolet 2011–2017 Chevrolet Caprice 2014–2017 Chevrolet SS Replaces OEM & Aftermarket Part Numbers Direct replacement for GM 8.3" performance ring & pinion sets Compatible with factory gear ratios in G8, SS, and Caprice models Warranty & Quality Assurance Backed by a 2-Year / 100,000-Mile Warranty, Motive Gear ring and pinion sets are trusted for OE-level quality, quiet operation, and longevity.

Ideal for enthusiasts upgrading from stock ratios or restoring performance drivetrains in modern GM sedans.