High performance Ring & Pinion Gear Set for GM 8.5" & 8.6" in 3.73 - 24158 New

Ring & Pinion Gear Set 3.73 Ratio for GM 8.5" and 8.6"

This high performance ring and pinion gear set delivers a 3.73 gear ratio for GM 8.5 inch and 8.6 inch differentials, with OEM cross-reference 24158 for easy identification.

Overview

This ring and pinion gear set is a 3.73 ratio gearset designed to fit GM 8.5 inch and 8.6 inch rear differentials. The set provides a balance of acceleration and highway drivability, making it a solid choice for performance builds, towing rigs, and daily drivers needing a gear change.

Built For Performance

• Precision-cut gear teeth for smooth, quiet mesh
• 3.73 ratio for improved acceleration over taller factory gears
• Heat-treated steel construction for durability under torque load
• OEM cross-reference 24158 for easy part lookup
• Fits both 8.5 inch and 8.6 inch GM differential housings

Fits These Machines

• for GM 8.5 inch differential equipped vehicles
• for GM 8.6 inch differential equipped vehicles

On-The-Job Use

• Gear ratio changes for improved towing and acceleration
• Differential rebuilds on worn or noisy gear sets
• Performance builds for street and strip applications
• Restoring correct gear ratio after axle swaps

Specs At A Glance

Good To Know

Q: Does this gear set require a new install kit? A: Yes, a proper install kit with shims, bearings, and a crush sleeve is strongly recommended for correct gear setup and backlash.

Q: Will this change my speedometer reading? A: Yes, changing gear ratio affects speedometer accuracy, so recalibration may be needed after installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.