Yukon Gear & Axle YG GM8.6-345IRS Ring & Pinion Gear Set 3.45 for GM 8.6" IRS

Vehicle Fitment

• GM 8.6" Independent Rear Suspension (IRS) Rear Differential

Fitment Notes

• Specifically designed for GM 8.6" IRS rear differentials with 32-spline pinion.
• Requires correct ring gear bolt pattern (10-bolt) for proper installation.
• Compatible only with IRS housings of the GM 8.6" type; not for solid axles or other gear ratios.

Features

• High-performance matched ring & pinion gear set engineered for strength and durability.
• Heat-treated alloy steel construction for long-lasting performance under high torque loads.
• Precision-machined gear teeth for smooth operation and minimal noise.
• Optimized for GM 8.6" IRS rear axle housings.
• Enhances driveline performance for upgraded engines or tire sizes.
• Matched set ensures correct gear mesh and long-term reliability.
• Professional-grade component suitable for rebuilds and performance applications.
• Provides consistent operation under heavy-duty or street performance conditions.

Specifications

• Gear ratio: 3.45:1
• Ring gear diameter: 8.6"
• Pinion spline count: 32 splines
• Ring gear bolt count: 10 bolts
• Position: Rear axle (IRS)
• Material: Heat-treated alloy steel
• Manufacturer part number: YG GM8.6-345IRS

Included Components

• 1x Ring & Pinion gear set (3.45 ratio)
• Note: Additional bearings, shims, or seals may be required for installation depending on housing condition.

Product Description

The Yukon Gear & Axle YG GM8.6-345IRS is a precision-engineered ring and pinion gear set designed for GM 8.6" independent rear suspension (IRS) rear differentials. The 3.45:1 gear ratio delivers reliable performance, smooth operation, and long-lasting durability for rebuilds or upgraded drivetrains.

Constructed from heat-treated alloy steel and precision-machined to exacting standards, this gear set provides excellent load handling, quiet operation, and consistent performance. It is ideal for applications requiring a robust matched set for GM 8.6" IRS housings.

Before installation, confirm that the housing is a GM 8.6" IRS type and that the pinion spline count and ring gear bolt pattern match the specifications above. Proper installation ensures maximum longevity and optimal gear performance.