Yukon Gear High Performance Ring & Pinion Set For 14+ GM 9.5in in a 4.56 Ratio

High Performance Ring and Pinion Gear Set for 2014+ GM 9.5in Differential, Part YG GM9.5-456-12B

The Yukon Gear YG GM9.5-456-12B is a high-performance ring and pinion gear set designed for the 14-bolt GM 9.5 inch differential found in 2014 and newer Chevrolet and GMC trucks, SUVs, and vans. Forged from 8620 steel with computer-controlled heat treatment and precision CNC machining, this gear set delivers a 4.56 ratio upgrade optimized for larger tire fitments, towing applications, and performance builds. The YG GM9.5-456-12B replaces factory gears with a quiet, durable upgrade backed by Yukon engineering.

Features and Benefits

• Fits 2014 and newer GM 9.5 inch 14-bolt rear differential used in Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, and Express platforms
• 4.56 ring and pinion ratio ideal for 37-40 inch tire applications and heavy towing builds
• Gear blanks forged from 8620 steel for maximum strength and fatigue resistance
• Fully automated CNC turning and single-pass cutting for precise tooth geometry
• Vacuum heat treatment and computer-controlled lapping for quiet, consistent operation
• 12-bolt ring gear design matching the factory 14-bolt GM 9.5 inch housing
• Yukon Y.E.S. Plan lifetime warranty coverage for as long as you own the vehicle
• Special Order item; verify availability at time of purchase

Vehicle Fitment

Specifications

What's Included

• Ring gear (9.50 in., 12-bolt, 4.56 ratio)
• Pinion gear (4.56 ratio, matched set)

Frequently Asked Questions

What differential does the YG GM9.5-456-12B fit?
This gear set fits the GM 9.5 inch 14-bolt rear differential found in 2014 and newer Chevrolet Silverado 1500, GMC Sierra 1500, Tahoe, Suburban, Yukon, Escalade, Express 2500, and Savana 2500 applications.

What tire size is the 4.56 ratio designed for?
A 4.56 ratio is best suited for 37-40 inch tire applications, restoring highway cruising RPM and pulling performance degraded by large tire diameter.

Does the YG GM9.5-456-12B require a master overhaul kit?
Yes, a master overhaul kit with bearings, races, seals, and shims is required for installation but sold separately. Verify the correct kit for your GM 9.5 inch application before ordering.

Will installing this gear set void my factory powertrain warranty under the Magnuson-Moss Warranty Act?
The Magnuson-Moss Warranty Act prohibits a manufacturer from voiding your warranty based solely on the use of an aftermarket part. The YG GM9.5-456-12B gear set is a precision-fit component that should not affect unrelated warranty coverage.

What warranty does Yukon provide on this gear set?
Yukon covers the YG GM9.5-456-12B under their Y.E.S. Plan lifetime warranty for as long as you own the vehicle.

Is this a ring and pinion set only, or a complete kit?
The YG GM9.5-456-12B is a ring and pinion set only. A separate master overhaul kit is required for all bearings and installation hardware.

Is professional installation recommended?
Yes. Setting ring and pinion gear contact pattern and backlash requires specialized tools. Professional installation is strongly recommended for best results.

Can I use this gear set in a posi or locker carrier?
Yes. The ring gear bolts to the carrier independently of the differential type. This gear set is compatible with open, limited-slip, and locker carriers in the GM 9.5 inch housing.

Installation Instructions

1. Lift the vehicle safely and drain the rear differential fluid.
2. Remove the driveshaft and rear axle shafts as needed to access the differential.
3. Remove the differential carrier from the housing and press off existing bearings.
4. Remove the old pinion, noting shim stack thickness for reference.
5. Install new pinion bearings from the overhaul kit and set pinion depth with a dial indicator.
6. Torque the pinion nut to the specification in your service manual.
7. Remove the old ring gear from the carrier and clean the mounting surface.
8. Install the new YG GM9.5-456-12B ring gear and torque ring gear bolts to spec.
9. Install the carrier assembly and set backlash to 0.005-0.010 in. using carrier shims.
10. Verify contact pattern with gear marking compound; adjust shims as necessary.
11. Reinstall the differential cover with a new gasket or RTV and torque to spec.
12. Refill with the proper GM 9.5 inch differential fluid and road-test the vehicle.

Prop 65 Warning: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.