Motive Gear G80370, Differential Ring & Pinion, For GM 7.75" IRS, Gear Ratio: 3.70, 8-Bolt, 27 Spline, 10 Pinion & 37 Ring Tooth – Fits 2004–2006 Pontiac GTO, Replaces Nitro GMBW-370-NG, OE SS78-370.

Motive Gear G80370, Differential Ring & Pinion, For GM 7.75" IRS, Gear Ratio: 3.70, 8-Bolt, 27 Spline, 10 Pinion & 37 Ring Tooth – Fits 2004–2006 Pontiac GTO – A performance-grade gear set designed for strength, speed, and reliability in high-output applications.⚙ Features & Benefits:Gear Ratio: 3.70 ratio with 10-tooth pinion and 37-tooth ring gear for improved acceleration and response.Strong & Durable: Made from premium 8620 steel, precision-cut and heat-treated for superior wear resistance and torque handling.Exact Fitment: 1.376" pinion shaft diameter, 27-spline pinion, and 8-bolt ring gear – designed specifically for GM 7.75" IRS setups.Performance Ready: Great for high-performance street builds and gear ratio upgrades in the Pontiac GTO platform.Warranty Coverage: Includes a 2-year / 100,000-mile limited warranty from Motive Gear.🔄 Applications & Compatibility:🔹 Pontiac:2004–2006 Pontiac GTO – GM 7.75" IRS differential🔄 Replaces:Nitro Gear & Axle: GMBW-370-NGOE Aftermarket: SS78-370🛡 Warranty & Why Choose Motive Gear?🛡 Warranty: 2 Years / 100,000 Miles – Covers materials and workmanship for long-lasting performance.⚙ Engineered for Performance: Designed to exceed factory specifications, ensuring smooth, quiet operation and maximum strength.🔧 Trusted by Enthusiasts: Motive Gear is a go-to brand for street, strip, and off-road gear upgrades.

• Built for GM 7.75" Independent Rear Suspension (IRS), this 3.70 ratio ring & pinion set features 10-tooth pinion, 37-tooth ring gear, 1.376" pinion shaft diameter, and 27 splines – ideal for performance and street upgrades.
• Constructed from premium 8620 steel for high tensile strength, improved wear resistance, and dependable power transfer under demanding conditions.
• Features standard gear rotation, 8-bolt ring gear mounting, and is compatible with GM 7.75" IRS carrier assemblies found in 2004–2006 Pontiac GTO.
• Set includes precision-machined ring gear and pinion gear for a complete replacement or gear ratio change to improve launch and acceleration.
• Backed by Motive Gear’s 2-year / 100,000-mile warranty for confidence in both performance and durability on the street or track.