Yukon Gear High Performance Gear Set For GM 12 Bolt Truck in a 3.73 Ratio
Technical Data
Ring and Pinion Gear Set from Yukon Gear is designed for truck owners who want dependable performance and rugged reliability. Whether you’re towing, off-roading, or upgrading your daily driver, this gear set ensures your GM 12 Bolt Truck differential delivers consistent power and smooth operation.
Built with high-performance engineering, the Yukon Gear Ring and Pinion Gear Set is crafted to handle heavy loads and demanding conditions. The 3.73 ratio strikes the perfect balance between torque and fuel efficiency, making it ideal for versatile truck applications.
Backed by Yukon’s reputation for quality and precision, this gear set is trusted by enthusiasts and professionals alike. If you want a gear set that won’t quit when the job gets tough, Yukon delivers the strength and dependability your truck deserves.
Features and Benefits
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High Performance Build – Engineered for maximum strength and longevity under heavy loads.
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3.73 Gear Ratio – Balances towing power with fuel efficiency.
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Precision Machining – Ensures smooth operation and reduced wear.
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Trusted Yukon Quality – Backed by a brand known for reliability.
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Perfect Fit – Designed for GM 12 Bolt Truck differentials.
Built for American Roads
With the Ring and Pinion Gear Set, you’ll feel the difference in pulling power, acceleration, and overall drivability. Yukon Gear makes sure your truck is ready for whatever America throws at it—whether that’s hauling, mudding, or long highway runs.
Specifications
| Specification | Detail |
|---|---|
| Part Number | yukYG GM12T-373 |
| Axle Model | GM 12T |
| Gear Ratio | 3.73 |
| Pinion Spline Count | 30 |
| Ring Gear Bolt Quantity | 12 |
| Ring Gear Diameter | 8.88 – 8.875 inches |
| Cover Bolt Quantity | 12 |
| Differential Fitment | GM 12 Bolt Truck |
| Position | Rear |
| Axle Type | Semi Float |
| Mounting Hardware | Not Included |
| Shims | Not Included |
| CA Proposition 65 | Not Applicable |
Installation Instructions
Installation Instructions
Installation Instructions
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1969-1974 | Chevrolet | Blazer | Base |
| 1987 | Chevrolet | Blazer | Custom Deluxe |
| 1987 | Chevrolet | Blazer | Silverado |
| 1978-1980 | Chevrolet | C10 | Big Ten |
| 1975-1981 | Chevrolet | C10 | Cheyenne |
| 1981-1986 | Chevrolet | C10 | Custom |
| 1975-1980 | Chevrolet | C10 | Custom Deluxe |
| 1981 | Chevrolet | C10 | Deluxe |
| 1975-1986 | Chevrolet | C10 | Scottsdale |
| 1975-1986 | Chevrolet | C10 | Silverado |
| 1963-1974 | Chevrolet | C10 Pickup | Base |
| 1975-1981 | Chevrolet | G10 | Beauville |
| 1981 | Chevrolet | G10 | Bonaventure |
| 1975-1981 | Chevrolet | G10 | Chevy Van |
| 1975-1981 | Chevrolet | G10 | Sportvan |
| 1967,1969-1974 | Chevrolet | G10 Van | Base |
| 1968-1974 | Chevrolet | G10 Van | Sportvan |
| 1975-1981 | Chevrolet | K10 | Cheyenne |
| 1981-1986 | Chevrolet | K10 | Custom |
| 1975-1980 | Chevrolet | K10 | Custom Deluxe |
| 1981 | Chevrolet | K10 | Deluxe |
| 1975-1986 | Chevrolet | K10 | Scottsdale |
| 1975-1986 | Chevrolet | K10 | Silverado |
| 1963-1974 | Chevrolet | K10 Pickup | Base |
| 1967-1974 | Chevrolet | K10 Suburban | Base |
| 1981-1986 | Chevrolet | K10 Suburban | Custom |
| 1975-1980 | Chevrolet | K10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K10 Suburban | Deluxe |
| 1975-1980,1982,1984-1986 | Chevrolet | K10 Suburban | Scottsdale |
| 1975-1977,1979-1980,1982-1983,1985-1986 | Chevrolet | K10 Suburban | Silverado |
| 1976 | Chevrolet | K5 Blazer | Base |
| 1975-1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1981-1986 | Chevrolet | K5 Blazer | Custom |
| 1975,1977-1980 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1984 | Chevrolet | K5 Blazer | Scottsdale |
| 1978,1980-1986 | Chevrolet | K5 Blazer | Silverado |
| 1987 | Chevrolet | R10 | Custom Deluxe |
| 1987 | Chevrolet | R10 | Scottsdale |
| 1987 | Chevrolet | R10 | Silverado |
| 1963-1966 | Chevrolet | Suburban | Base |
| 1987 | Chevrolet | V10 | Custom Deluxe |
| 1987 | Chevrolet | V10 | Scottsdale |
| 1987 | Chevrolet | V10 | Silverado |
| 1987 | Chevrolet | V10 Suburban | Custom Deluxe |
| 1987 | Chevrolet | V10 Suburban | Scottsdale |
| 1987 | Chevrolet | V10 Suburban | Silverado |
| 1975-1978 | GMC | C15 | Base |
| 1977-1978 | GMC | C15 | Heavy Half |
| 1975-1978 | GMC | C15 | High Sierra |
| 1977 | GMC | C15 | Indy Hauler |
| 1975-1978 | GMC | C15 | Sierra Classic |
| 1975-1978 | GMC | C15 | Sierra Grande |
| 1978 | GMC | C15 | Street Coupe |
| 1975-1978 | GMC | C15 Suburban | Base |
| 1975-1978 | GMC | C15 Suburban | High Sierra |
| 1975-1978 | GMC | C15 Suburban | Sierra Classic |
| 1975-1978 | GMC | C15 Suburban | Sierra Grande |
| 1967-1974 | GMC | C15/C1500 Pickup | Base |
| 1967-1974 | GMC | C15/C1500 Suburban | Base |
| 1979-1986 | GMC | C1500 | Base |
| 1979-1980 | GMC | C1500 | Heavy Half |
| 1979-1986 | GMC | C1500 | High Sierra |
| 1979-1986 | GMC | C1500 | Sierra Classic |
| 1979-1982 | GMC | C1500 | Sierra Grande |
| 1979-1982 | GMC | C1500 | Street Coupe |
| 1979-1986 | GMC | C1500 Suburban | Base |
| 1979-1986 | GMC | C1500 Suburban | High Sierra |
| 1979-1986 | GMC | C1500 Suburban | Sierra Classic |
| 1979-1982 | GMC | C1500 Suburban | Sierra Grande |
| 1975-1978 | GMC | G15 | Rally |
| 1975-1978 | GMC | G15 | Rally STX |
| 1975-1978 | GMC | G15 | Vandura |
| 1967,1970-1971 | GMC | G15/G1500 Van | Base |
| 1968-1969,1971-1974 | GMC | G15/G1500 Van | Rally |
| 1968-1974 | GMC | G15/G1500 Van | Vandura |
| 1964-1966 | GMC | G1500 | Base |
| 1979-1987 | GMC | G1500 | Rally |
| 1983-1984 | GMC | G1500 | Rally Custom |
| 1979-1987 | GMC | G1500 | Rally STX |
| 1979-1987 | GMC | G1500 | Vandura |
| 1975-1978 | GMC | G25 | Rally |
| 1975-1978 | GMC | G25 | Rally STX |
| 1975-1978 | GMC | G25 | Vandura |
| 1967,1970-1972 | GMC | G25/G2500 Van | Base |
| 1968-1969,1971-1974 | GMC | G25/G2500 Van | Rally |
| 1968-1974 | GMC | G25/G2500 Van | Vandura |
| 1979-1981 | GMC | G2500 | Rally |
| 1979-1981 | GMC | G2500 | Rally STX |
| 1979-1981 | GMC | G2500 | Vandura |
| 1975-1978 | GMC | K15 | Base |
| 1975-1978 | GMC | K15 | High Sierra |
| 1977 | GMC | K15 | Indy Hauler |
| 1975-1978 | GMC | K15 | Sierra Classic |
| 1975-1978 | GMC | K15 | Sierra Grande |
| 1975-1978 | GMC | K15 Suburban | Base |
| 1975-1978 | GMC | K15 Suburban | High Sierra |
| 1975-1978 | GMC | K15 Suburban | Sierra Classic |
| 1975-1978 | GMC | K15 Suburban | Sierra Grande |
| 1966-1974 | GMC | K15/K1500 Pickup | Base |
| 1967-1974 | GMC | K15/K1500 Suburban | Base |
| 1979-1986 | GMC | K1500 | Base |
| 1979-1986 | GMC | K1500 | High Sierra |
| 1979-1986 | GMC | K1500 | Sierra Classic |
| 1979-1982 | GMC | K1500 | Sierra Grande |
| 1979-1985 | GMC | K1500 Suburban | Base |
| 1979-1985 | GMC | K1500 Suburban | High Sierra |
| 1979-1985 | GMC | K1500 Suburban | Sierra Classic |
| 1979-1982 | GMC | K1500 Suburban | Sierra Grande |
| 1987 | GMC | R1500 | Base |
| 1987 | GMC | R1500 | High Sierra |
| 1987 | GMC | R1500 | Sierra Classic |
| 1987 | GMC | R1500 Suburban | Base |
| 1987 | GMC | R1500 Suburban | High Sierra |
| 1987 | GMC | R1500 Suburban | Sierra Classic |
| 1963-1966 | GMC | Suburban | Base |
| 1987 | GMC | V1500 | Base |
| 1987 | GMC | V1500 | High Sierra |
| 1987 | GMC | V1500 | Sierra Classic |
| 1987 | GMC | V1500 Suburban | Base |
| 1987 | GMC | V1500 Suburban | High Sierra |
| 1987 | GMC | V1500 Suburban | Sierra Classic |
REVIEWS
Installed the Yukon 3.73 gears in my ’85 Chevy C10. The truck feels stronger off the line and cruises smooth on the highway. Great upgrade for classic rigs.
David K.
Houston, TX
Put these gears in my GM 12 bolt rear end. Perfect balance of power and efficiency. Yukon nailed it—smooth, quiet, and tough enough for hauling loads every weekend.
Steven M.
Denver, CO
Specifications
Fitment Data
• Engineered for precision compatibility with high-performance builds.
• Tested under extreme mechanical stress for guaranteed structural integrity.
Use the Riot Vehicle Finder to verify exact sub-model compatibility.
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