Yukon Gear Dura Grip Positraction for GM 12 Bolt Car 30 Spline 3.73+ Ratio

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SKU: YUKYDGGM12T-4-30-1
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Sale price$799.99 Regular price$859.00
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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 Dura Grip Positraction for GM 12 Bolt Cars

Elevate your driving experience with the Yukon Gear Dura Grip Positraction differential, specifically designed for GM 12-bolt car applications. This unit is built for 30 spline axles and is optimized for gear ratios of 3.73 and numerically lower (e.g., 3.73, 4.10, etc.), providing enhanced traction and control for performance-oriented vehicles.

Superior Traction and Durability:

  • Positraction Performance: Delivers smooth, reliable power to both drive wheels, improving acceleration and handling.
  • High-Strength Components: Constructed with a robust nodular case, forged 4320 chromoly spider gears, and durable composite clutches for exceptional longevity.
  • Engineered for Cars: Tailored for GM 12-bolt car differentials, ensuring a precise fit with 30 spline axles.
  • Optimized Gear Ratio Range: Ideal for setups using 3.73 or lower numerical gear ratios, common in performance applications.
  • Rebuildable Design: Allows for easy maintenance and ensures the unit can be restored to peak performance over time.

Vehicle Applications:

This Dura Grip differential is suitable for various GM cars equipped with the 12-bolt rear end and requiring 30 spline axles and the specified gear ratio range. It's a perfect upgrade for classic muscle cars and performance sedans seeking improved grip.

For unparalleled traction and a robust drivetrain upgrade, choose the Yukon Dura Grip. Get the confidence to put power down effectively. Explore the full range of drivetrain solutions at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1969-1974 Chevrolet Blazer Base
1987 Chevrolet Blazer Custom Deluxe
1987 Chevrolet Blazer Silverado
1972 Chevrolet Brookwood Base
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 Beauville
1975-1981 Chevrolet G10 Chevy Van
1975-1981 Chevrolet G10 Sportvan
1981-1982 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
1987-1988 Chevrolet V10 Suburban Scottsdale
1987-1988 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

…and 76 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 Dura Grip Positraction for GM 12 Bolt Cars

Elevate your driving experience with the Yukon Gear Dura Grip Positraction differential, specifically designed for GM 12-bolt car applications. This unit is built for 30 spline axles and is optimized for gear ratios of 3.73 and numerically lower (e.g., 3.73, 4.10, etc.), providing enhanced traction and control for performance-oriented vehicles.

Superior Traction and Durability:

  • Positraction Performance: Delivers smooth, reliable power to both drive wheels, improving acceleration and handling.
  • High-Strength Components: Constructed with a robust nodular case, forged 4320 chromoly spider gears, and durable composite clutches for exceptional longevity.
  • Engineered for Cars: Tailored for GM 12-bolt car differentials, ensuring a precise fit with 30 spline axles.
  • Optimized Gear Ratio Range: Ideal for setups using 3.73 or lower numerical gear ratios, common in performance applications.
  • Rebuildable Design: Allows for easy maintenance and ensures the unit can be restored to peak performance over time.

Vehicle Applications:

This Dura Grip differential is suitable for various GM cars equipped with the 12-bolt rear end and requiring 30 spline axles and the specified gear ratio range. It's a perfect upgrade for classic muscle cars and performance sedans seeking improved grip.

For unparalleled traction and a robust drivetrain upgrade, choose the Yukon Dura Grip. Get the confidence to put power down effectively. Explore the full range of drivetrain solutions at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1969-1974 Chevrolet Blazer Base
1987 Chevrolet Blazer Custom Deluxe
1987 Chevrolet Blazer Silverado
1972 Chevrolet Brookwood Base
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 Beauville
1975-1981 Chevrolet G10 Chevy Van
1975-1981 Chevrolet G10 Sportvan
1981-1982 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
1987-1988 Chevrolet V10 Suburban Scottsdale
1987-1988 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

…and 76 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 Dura Grip Positraction for GM 12 Bolt Cars

Elevate your driving experience with the Yukon Gear Dura Grip Positraction differential, specifically designed for GM 12-bolt car applications. This unit is built for 30 spline axles and is optimized for gear ratios of 3.73 and numerically lower (e.g., 3.73, 4.10, etc.), providing enhanced traction and control for performance-oriented vehicles.

Superior Traction and Durability:

  • Positraction Performance: Delivers smooth, reliable power to both drive wheels, improving acceleration and handling.
  • High-Strength Components: Constructed with a robust nodular case, forged 4320 chromoly spider gears, and durable composite clutches for exceptional longevity.
  • Engineered for Cars: Tailored for GM 12-bolt car differentials, ensuring a precise fit with 30 spline axles.
  • Optimized Gear Ratio Range: Ideal for setups using 3.73 or lower numerical gear ratios, common in performance applications.
  • Rebuildable Design: Allows for easy maintenance and ensures the unit can be restored to peak performance over time.

Vehicle Applications:

This Dura Grip differential is suitable for various GM cars equipped with the 12-bolt rear end and requiring 30 spline axles and the specified gear ratio range. It's a perfect upgrade for classic muscle cars and performance sedans seeking improved grip.

For unparalleled traction and a robust drivetrain upgrade, choose the Yukon Dura Grip. Get the confidence to put power down effectively. Explore the full range of drivetrain solutions at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1969-1974 Chevrolet Blazer Base
1987 Chevrolet Blazer Custom Deluxe
1987 Chevrolet Blazer Silverado
1972 Chevrolet Brookwood Base
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 Beauville
1975-1981 Chevrolet G10 Chevy Van
1975-1981 Chevrolet G10 Sportvan
1981-1982 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
1987-1988 Chevrolet V10 Suburban Scottsdale
1987-1988 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

…and 76 additional fitments. Contact us to confirm yours.

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