Yukon YG GM14T-373 Ring & Pinion Set 3.73 Ratio for GM 10.5 14-Bolt Truck Rear

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Product Specification:

SKU:YUKYG GM14T-373

MPN: YG GM14T-373

UPC: 883584241348

Weight: 24.1 lb

Type: Final Drive Gears

Vehicle Fitment

1973-2000 Chevrolet C20 / C2500 (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
1973-2000 Chevrolet K20 / K2500 (4WD, GM 10.5" 14-Bolt Full-Float Rear)
1973-2000 Chevrolet C30 / C3500 (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
1973-2000 Chevrolet K30 / K3500 (4WD, GM 10.5" 14-Bolt Full-Float Rear)
1973-2015 Chevrolet Suburban 3/4 Ton (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
1999-2015 Chevrolet Silverado 2500 / 2500 HD (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
2001-2015 Chevrolet Silverado HD 3500 (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
2007 Chevrolet Silverado 2500 HD Classic (GM 10.5" 14-Bolt Full-Float Rear)
2002-2006 Chevrolet Avalanche 2500 (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
1996-2015 Chevrolet Express Van 2500 / 3500 / 4500 (GM 10.5" 14-Bolt Full-Float Rear)
1975-1996 Chevrolet G20 / G30 (GM 10.5" 14-Bolt Full-Float Rear)
1973-2000 GMC C25 / C2500 (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
1973-2000 GMC K25 / K2500 (4WD, GM 10.5" 14-Bolt Full-Float Rear)
1973-2000 GMC C35 / C3500 (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
1973-2000 GMC K35 / K3500 (4WD, GM 10.5" 14-Bolt Full-Float Rear)
1999-2015 GMC Sierra 2500 / 2500 HD (RWD/4WD, GM 10.5" 14-Bolt Full-Float Rear)
2001-2002 GMC C3500HD (GM 10.5" 14-Bolt Full-Float Rear)
2007 GMC Sierra 2500 HD Classic (GM 10.5" 14-Bolt Full-Float Rear)
1987-1991 GMC V2500 / R2500 Suburban (GM 10.5" 14-Bolt Full-Float Rear)
1996-2015 GMC Savana 2500 / 3500 / 4500 (GM 10.5" 14-Bolt Full-Float Rear)
1997-1999 GMC / Chevrolet P3500 (GM 10.5" 14-Bolt Full-Float Rear)
2015 GMC Yukon XL 2500 (GM 10.5" 14-Bolt Full-Float Rear)

Fitment Notes

Fits GM 10.5" 14-bolt full-float rear differential only - does not fit the GM 9.5" semi-float 14-bolt or the GM 11.5" AAM rear axle
Carrier break for this differential is 4.10/4.56 - the 3.73 ratio uses the numerically lower (3.73 and down) carrier; confirm carrier series before ordering
30-spline pinion - verify spline count on your existing pinion before purchase
The GM 10.5" 14-bolt axle was used in 3/4-ton and 1-ton trucks and vans from 1973 onward; always confirm ring gear diameter (10.5") before ordering
Professional installation required - ring and pinion setup on the 14-bolt demands specialized tools and precise preload and backlash measurements

Features

High-grade steel construction in both ring and pinion for exceptional strength under heavy-duty towing and hauling loads
Precision-engineered gear tooth surface finish reduces friction and heat during sustained high-torque operation
Built to OEM dimensional tolerances for accurate fit within the GM 10.5" 14-bolt housing
Advanced heat-treating process hardens gear surfaces for improved shear strength and long-term wear resistance
Validated through two in-house Yukon quality labs for dimensional accuracy and metallurgical integrity
3.73 ratio delivers a strong balance of low-end torque and highway driveability - well suited for larger tires and heavy towing
Quiet operation achieved through precision tooth geometry and tight manufacturing tolerances
Backed by Yukon's Y.E.S. Plan - lifetime no-questions-asked coverage for as long as you own the vehicle

Specifications

Part Number: YG GM14T-373
Gear Ratio: 3.73
Ring Gear Diameter: 10.50"
Ring Gear Bolt Count: 12
Cover Bolt Count: 14
Pinion Spline Count: 30
Carrier Break: 4.10 / 4.56 (3.73 and numerically lower ratios use the standard carrier)
Axle Type: Full-Float
Differential Application: GM 10.5" 14-Bolt Truck Rear
Position: Rear Axle

Included Components

1x Ring Gear
1x Pinion Gear

Product Description

The Yukon YG GM14T-373 is a high-performance ring and pinion gear set built for the GM 10.5" 14-bolt full-float rear differential - one of the most capable and widely used heavy-duty axle platforms in GM truck and van history. Introduced in 1973 and carried through 2015 in various 3/4-ton and 1-ton applications, this axle is found in Silverado HD, Sierra HD, Suburban, Avalanche 2500, Express, and Savana platforms. The 3.73 ratio strikes an excellent balance between towing torque and highway fuel efficiency, making it one of the most popular re-gear choices for work trucks running larger tires or hauling heavy loads.

Yukon engineers this gear set using high-grade steel with a precision-finished tooth profile that minimizes friction and heat - critical for a differential that regularly operates under sustained heavy load. Advanced heat-treating further hardens the gear surfaces for long-term durability and shear resistance. Every set is built to OEM dimensional specs for a reliable, accurate fit within the 14-bolt housing. Note that the 3.73 ratio uses the standard (numerically lower) carrier - the carrier break on this axle is at 4.10/4.56, so confirm your carrier series before purchasing.

This gear set is specific to the GM 10.5" 14-bolt full-float rear axle with a 30-spline pinion and 12-bolt ring gear. It does not fit the 9.5" semi-float 14-bolt or the later GM 11.5" AAM rear differential. Always confirm your ring gear diameter before ordering. Professional installation with proper differential setup tools is strongly recommended. For a complete differential rebuild, pair this gear set with a compatible Yukon master overhaul kit for all necessary bearings, seals, and hardware.