Yukon Gear Master Overhaul Kit For GM 12 Bolt Truck Diff — Fits 1963-1968 Chevrolet, GMC

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SKU: YUKYK GM12T
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Yukon Gear & Axle

Yukon Gear & Axle is the off-road and truck differential expert — gear sets, lockers, axle shafts, and complete axle assemblies for Dana 30, Dana 44, Dana 60, and modern AAM axles. The trusted source for rock-crawler and overland gear changes.

Watch in action

Yukon Gear Master Overhaul Kit for GM 12 Bolt Truck Differentials

Rebuild your GM 12-bolt truck differential with confidence using this comprehensive Master Overhaul Kit from Yukon Gear & Axle. Engineered for the demanding conditions of truck applications, this kit provides all the necessary high-quality components to ensure a robust and reliable rebuild. Featuring premium Timken bearings and races, this kit is designed for maximum durability and performance under load.

Essential Components Included:

  • Carrier Bearings and Races
  • Pinion Bearings and Races
  • Pinion Seal
  • Complete Shim Kit
  • Ring Gear Bolts
  • Pinion Nut
  • Crush Sleeve (if applicable)
  • Oil Baffles and Slingers (if applicable)
  • Thread Locking Compound
  • Marking Compound with Brush
  • Gasket

Yukon Gear & Axle specializes in providing precisely tailored kits for a wide range of applications. This Master Overhaul Kit represents their dedication to quality, offering the most complete solution on the market. Extensive research ensures each component is optimized for your specific truck differential. Whether for heavy-duty use or daily driving, this kit delivers the reliability and performance you expect. Trust Yukon Gear for superior drivetrain components.

Ensure your truck's differential is in top condition. Purchase the Yukon Gear Master Overhaul Kit for your GM 12-bolt truck application today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1969-1974 Chevrolet Blazer Base
1987 Chevrolet Blazer Custom Deluxe
1987 Chevrolet Blazer Silverado
1975-1980 Chevrolet C10 Custom Deluxe
1975-1981 Chevrolet C10 Cheyenne
1975-1986 Chevrolet C10 Scottsdale
1975-1986 Chevrolet C10 Silverado
1978-1980 Chevrolet C10 Big Ten
1981 Chevrolet C10 Deluxe
1981-1986 Chevrolet C10 Custom
1963-1974 Chevrolet C10 Pickup Base
1975-1981 Chevrolet G10 Sportvan
1975-1981 Chevrolet G10 Beauville
1975-1981 Chevrolet G10 Chevy Van
1981 Chevrolet G10 Bonaventure
1967 Chevrolet G10 Van Base
1968-1974 Chevrolet G10 Van Sportvan
1969-1974 Chevrolet G10 Van Base
1975-1980 Chevrolet K10 Custom Deluxe
1975-1981 Chevrolet K10 Cheyenne
1975-1986 Chevrolet K10 Scottsdale
1975-1986 Chevrolet K10 Silverado
1981 Chevrolet K10 Deluxe
1981-1986 Chevrolet K10 Custom
1963-1974 Chevrolet K10 Pickup Base
1967-1974 Chevrolet K10 Suburban Base
1975-1977 Chevrolet K10 Suburban Silverado
1975-1980 Chevrolet K10 Suburban Custom Deluxe
1975-1980 Chevrolet K10 Suburban Scottsdale
1979-1980 Chevrolet K10 Suburban Silverado
1981 Chevrolet K10 Suburban Deluxe
1981-1986 Chevrolet K10 Suburban Custom
1982 Chevrolet K10 Suburban Scottsdale
1982-1983 Chevrolet K10 Suburban Silverado
1984-1986 Chevrolet K10 Suburban Scottsdale
1985-1986 Chevrolet K10 Suburban Silverado
1975 Chevrolet K5 Blazer Custom Deluxe
1975-1980 Chevrolet K5 Blazer Cheyenne
1976 Chevrolet K5 Blazer Base
1977-1980 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1980-1986 Chevrolet K5 Blazer Silverado
1981 Chevrolet K5 Blazer Deluxe
1981-1986 Chevrolet K5 Blazer Custom
1984 Chevrolet K5 Blazer Scottsdale
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 Sierra Classic
1975-1978 GMC C15 Sierra Grande
1975-1978 GMC C15 Base
1975-1978 GMC C15 High Sierra
1977 GMC C15 Indy Hauler

…and 74 additional fitments. Contact us to confirm yours.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Yukon Gear & Axle

Yukon Gear & Axle is the off-road and truck differential expert — gear sets, lockers, axle shafts, and complete axle assemblies for Dana 30, Dana 44, Dana 60, and modern AAM axles. The trusted source for rock-crawler and overland gear changes.

Watch in action

Yukon Gear Master Overhaul Kit for GM 12 Bolt Truck Differentials

Rebuild your GM 12-bolt truck differential with confidence using this comprehensive Master Overhaul Kit from Yukon Gear & Axle. Engineered for the demanding conditions of truck applications, this kit provides all the necessary high-quality components to ensure a robust and reliable rebuild. Featuring premium Timken bearings and races, this kit is designed for maximum durability and performance under load.

Essential Components Included:

  • Carrier Bearings and Races
  • Pinion Bearings and Races
  • Pinion Seal
  • Complete Shim Kit
  • Ring Gear Bolts
  • Pinion Nut
  • Crush Sleeve (if applicable)
  • Oil Baffles and Slingers (if applicable)
  • Thread Locking Compound
  • Marking Compound with Brush
  • Gasket

Yukon Gear & Axle specializes in providing precisely tailored kits for a wide range of applications. This Master Overhaul Kit represents their dedication to quality, offering the most complete solution on the market. Extensive research ensures each component is optimized for your specific truck differential. Whether for heavy-duty use or daily driving, this kit delivers the reliability and performance you expect. Trust Yukon Gear for superior drivetrain components.

Ensure your truck's differential is in top condition. Purchase the Yukon Gear Master Overhaul Kit for your GM 12-bolt truck application today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1969-1974 Chevrolet Blazer Base
1987 Chevrolet Blazer Custom Deluxe
1987 Chevrolet Blazer Silverado
1975-1980 Chevrolet C10 Custom Deluxe
1975-1981 Chevrolet C10 Cheyenne
1975-1986 Chevrolet C10 Scottsdale
1975-1986 Chevrolet C10 Silverado
1978-1980 Chevrolet C10 Big Ten
1981 Chevrolet C10 Deluxe
1981-1986 Chevrolet C10 Custom
1963-1974 Chevrolet C10 Pickup Base
1975-1981 Chevrolet G10 Sportvan
1975-1981 Chevrolet G10 Beauville
1975-1981 Chevrolet G10 Chevy Van
1981 Chevrolet G10 Bonaventure
1967 Chevrolet G10 Van Base
1968-1974 Chevrolet G10 Van Sportvan
1969-1974 Chevrolet G10 Van Base
1975-1980 Chevrolet K10 Custom Deluxe
1975-1981 Chevrolet K10 Cheyenne
1975-1986 Chevrolet K10 Scottsdale
1975-1986 Chevrolet K10 Silverado
1981 Chevrolet K10 Deluxe
1981-1986 Chevrolet K10 Custom
1963-1974 Chevrolet K10 Pickup Base
1967-1974 Chevrolet K10 Suburban Base
1975-1977 Chevrolet K10 Suburban Silverado
1975-1980 Chevrolet K10 Suburban Custom Deluxe
1975-1980 Chevrolet K10 Suburban Scottsdale
1979-1980 Chevrolet K10 Suburban Silverado
1981 Chevrolet K10 Suburban Deluxe
1981-1986 Chevrolet K10 Suburban Custom
1982 Chevrolet K10 Suburban Scottsdale
1982-1983 Chevrolet K10 Suburban Silverado
1984-1986 Chevrolet K10 Suburban Scottsdale
1985-1986 Chevrolet K10 Suburban Silverado
1975 Chevrolet K5 Blazer Custom Deluxe
1975-1980 Chevrolet K5 Blazer Cheyenne
1976 Chevrolet K5 Blazer Base
1977-1980 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1980-1986 Chevrolet K5 Blazer Silverado
1981 Chevrolet K5 Blazer Deluxe
1981-1986 Chevrolet K5 Blazer Custom
1984 Chevrolet K5 Blazer Scottsdale
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 Sierra Classic
1975-1978 GMC C15 Sierra Grande
1975-1978 GMC C15 Base
1975-1978 GMC C15 High Sierra
1977 GMC C15 Indy Hauler

…and 74 additional fitments. Contact us to confirm yours.

Product Details

Product Description

About Yukon Gear & Axle

Yukon Gear & Axle is the off-road and truck differential expert — gear sets, lockers, axle shafts, and complete axle assemblies for Dana 30, Dana 44, Dana 60, and modern AAM axles. The trusted source for rock-crawler and overland gear changes.

Watch in action

Yukon Gear Master Overhaul Kit for GM 12 Bolt Truck Differentials

Rebuild your GM 12-bolt truck differential with confidence using this comprehensive Master Overhaul Kit from Yukon Gear & Axle. Engineered for the demanding conditions of truck applications, this kit provides all the necessary high-quality components to ensure a robust and reliable rebuild. Featuring premium Timken bearings and races, this kit is designed for maximum durability and performance under load.

Essential Components Included:

  • Carrier Bearings and Races
  • Pinion Bearings and Races
  • Pinion Seal
  • Complete Shim Kit
  • Ring Gear Bolts
  • Pinion Nut
  • Crush Sleeve (if applicable)
  • Oil Baffles and Slingers (if applicable)
  • Thread Locking Compound
  • Marking Compound with Brush
  • Gasket

Yukon Gear & Axle specializes in providing precisely tailored kits for a wide range of applications. This Master Overhaul Kit represents their dedication to quality, offering the most complete solution on the market. Extensive research ensures each component is optimized for your specific truck differential. Whether for heavy-duty use or daily driving, this kit delivers the reliability and performance you expect. Trust Yukon Gear for superior drivetrain components.

Ensure your truck's differential is in top condition. Purchase the Yukon Gear Master Overhaul Kit for your GM 12-bolt truck application today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1969-1974 Chevrolet Blazer Base
1987 Chevrolet Blazer Custom Deluxe
1987 Chevrolet Blazer Silverado
1975-1980 Chevrolet C10 Custom Deluxe
1975-1981 Chevrolet C10 Cheyenne
1975-1986 Chevrolet C10 Scottsdale
1975-1986 Chevrolet C10 Silverado
1978-1980 Chevrolet C10 Big Ten
1981 Chevrolet C10 Deluxe
1981-1986 Chevrolet C10 Custom
1963-1974 Chevrolet C10 Pickup Base
1975-1981 Chevrolet G10 Sportvan
1975-1981 Chevrolet G10 Beauville
1975-1981 Chevrolet G10 Chevy Van
1981 Chevrolet G10 Bonaventure
1967 Chevrolet G10 Van Base
1968-1974 Chevrolet G10 Van Sportvan
1969-1974 Chevrolet G10 Van Base
1975-1980 Chevrolet K10 Custom Deluxe
1975-1981 Chevrolet K10 Cheyenne
1975-1986 Chevrolet K10 Scottsdale
1975-1986 Chevrolet K10 Silverado
1981 Chevrolet K10 Deluxe
1981-1986 Chevrolet K10 Custom
1963-1974 Chevrolet K10 Pickup Base
1967-1974 Chevrolet K10 Suburban Base
1975-1977 Chevrolet K10 Suburban Silverado
1975-1980 Chevrolet K10 Suburban Custom Deluxe
1975-1980 Chevrolet K10 Suburban Scottsdale
1979-1980 Chevrolet K10 Suburban Silverado
1981 Chevrolet K10 Suburban Deluxe
1981-1986 Chevrolet K10 Suburban Custom
1982 Chevrolet K10 Suburban Scottsdale
1982-1983 Chevrolet K10 Suburban Silverado
1984-1986 Chevrolet K10 Suburban Scottsdale
1985-1986 Chevrolet K10 Suburban Silverado
1975 Chevrolet K5 Blazer Custom Deluxe
1975-1980 Chevrolet K5 Blazer Cheyenne
1976 Chevrolet K5 Blazer Base
1977-1980 Chevrolet K5 Blazer Custom Deluxe
1978 Chevrolet K5 Blazer Silverado
1980-1986 Chevrolet K5 Blazer Silverado
1981 Chevrolet K5 Blazer Deluxe
1981-1986 Chevrolet K5 Blazer Custom
1984 Chevrolet K5 Blazer Scottsdale
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 Sierra Classic
1975-1978 GMC C15 Sierra Grande
1975-1978 GMC C15 Base
1975-1978 GMC C15 High Sierra
1977 GMC C15 Indy Hauler

…and 74 additional fitments. Contact us to confirm yours.

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