Motive Gear G80411, Differential Ring & Pinion, For GM 7.75" IRS, Gear Ratio: 4.11, 8-Bolt, 27 Spline, 9 Pinion & 37 Ring Tooth - Fits 2004–2006 Pontiac GTO

Short Summary: The Motive Gear G80411 Differential Ring & Pinion set is engineered for GM 7.75" IRS axles, specifically in 2004–2006 Pontiac GTO models. With a 4.11 gear ratio, 27-spline pinion, and high-quality 8620 steel construction, it’s perfect for performance-minded drivers upgrading their drivetrain. ​ Key FeaturesAxle Fitment: GM 7.75" Independent Rear Suspension (IRS) differential.Gear Ratio: 4.11, providing faster acceleration and stronger performance response.Construction: Made from 8620 steel for high durability and dependable performance under stress.Specs: 8-bolt ring gear, 9 pinion teeth, 37 ring gear teeth, 27-spline pinion shaft, 1.376" shaft diameter.Compatibility: Direct replacement for 2004–2006 Pontiac GTO equipped with GM 7.75" IRS rear end.Warranty: Protected by a 2-Year / 100,000-Mile manufacturer warranty. ​ Vehicle CompatibilityThe Motive Gear G80411 Ring & Pinion Set is compatible with the following vehicle: ​ Pontiac2004–2006 Pontiac GTO ​ Replaces OEM & Aftermarket Part NumbersOEM GM Ring & Pinion for GM 7.75" IRS ​ Warranty & Quality AssuranceMotive Gear offers a 2-Year / 100,000-Mile warranty on the G80411 gear set. Manufactured using industry-leading processes and materials, it ensures lasting performance for high-powered street and performance builds. ​

• Built for GM 7.75" Independent Rear Suspension (IRS) axles, this Motive Gear G80411 ring and pinion delivers high-performance gearing in a 4.11 ratio. Ideal for muscle car builds and performance upgrades, especially in IRS-configured drivetrains
• Features 8620 steel construction for superior strength and long-term durability. Engineered with 9 pinion teeth and 37 ring teeth for a smooth balance of torque delivery and highway driveability.
• Includes an 8-bolt ring gear and 27-spline pinion shaft with a 1.376" diameter, ensuring a precise OEM fit in compatible GM IRS housings—made for direct replacement or upgrade.
• Compatible with 2004–2006 Pontiac GTO models equipped with the GM 7.75" IRS rear end. Perfect for street or performance applications requiring a 4.11 gear ratio for improved acceleration.
• Backed by a 2-Year / 100,000-Mile warranty, Motive Gear provides trusted quality and performance. Designed for easy installation with factory-style components, including standard rotation gearing.