ARB Air Locker 10.5-Inch 30-Spline Full Float — Fits 1972-1975 Chevy & GMC 14-Bolt

SKU: ARBRD114
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About ARB ARB 4x4 Accessories is Australia's premier overland and ...Read More

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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 ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Heavy-Duty Traction for GM 14-Bolt Axles

Transform your classic Chevy or GMC truck with the legendary ARB Air Locker, designed for the robust 10.5-inch 14-bolt full-float rear axle. This premium locking differential is the gold standard for off-road traction, offering the driver complete control over when to lock the axle. With a simple pneumatic activation, you can instantly lock your differential to conquer mud, snow, and uneven terrain, ensuring both wheels turn in unison for maximum grip.

Key Features and Performance

  • 100% Selectable: Engage or disengage the locker instantly via an in-cab switch.
  • Full-Float Compatibility: Engineered specifically for 30-spline 10.5-inch GM 14-bolt axles.
  • Durability: High-strength components designed to handle heavy loads and high-torque applications.
  • Versatility: Perfect for classic K20, C20, and G-series van builds requiring superior traction.

The ARB Air Locker works by pneumatically locking the side gears to the carrier, forcing both axle shafts to rotate at the same speed regardless of surface traction. This eliminates the limitations of an open differential, allowing you to traverse obstacles that would otherwise stop a standard truck. When unlocked, the differential returns to its open state, maintaining excellent road manners and tire wear characteristics. Whether you are restoring a vintage K20 or building a dedicated trail rig, this locker provides the reliability needed for heavy-duty use. Enhance your vehicle's off-road potential with this professional-grade differential solution from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2004 Chevrolet Avalanche 2500 Base
2005 Chevrolet Avalanche 2500 LS
2005 Chevrolet Avalanche 2500 LT
1975-1980 Chevrolet C20 Custom Deluxe
1975-1981 Chevrolet C20 Cheyenne
1975-1986 Chevrolet C20 Scottsdale
1975-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1972-1974 Chevrolet C20 Pickup Base
1973-1974 Chevrolet C20 Suburban Base
1975-1977 Chevrolet C20 Suburban Silverado
1975-1980 Chevrolet C20 Suburban Custom Deluxe
1975-1980 Chevrolet C20 Suburban Scottsdale
1979-1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1988-1992 Chevrolet C2500 Scottsdale
1988-1998 Chevrolet C2500 Cheyenne
1988-1998 Chevrolet C2500 Silverado
1994-1995 Chevrolet C2500 WT
1994-1997 Chevrolet C2500 Base
1998 Chevrolet C2500 WT
1999-2000 Chevrolet C2500 Base
1999-2000 Chevrolet C2500 LS
1992-1994 Chevrolet C2500 Suburban Silverado
1992-1999 Chevrolet C2500 Suburban Base
1995-1997 Chevrolet C2500 Suburban LT
1995-1999 Chevrolet C2500 Suburban LS
1975-1980 Chevrolet C30 Custom Deluxe
1975-1981 Chevrolet C30 Cheyenne
1975-1986 Chevrolet C30 Scottsdale
1975-1986 Chevrolet C30 Silverado
1981 Chevrolet C30 Deluxe
1981-1986 Chevrolet C30 Custom
1972-1974 Chevrolet C30 Pickup Base
1988-1992 Chevrolet C3500 Scottsdale
1988-1998 Chevrolet C3500 Cheyenne
1988-1998 Chevrolet C3500 Silverado
1994-1997 Chevrolet C3500 Base
1999-2000 Chevrolet C3500 Base
1999-2000 Chevrolet C3500 LS
1996-1998 Chevrolet Express 3500 Base
1996-1998 Chevrolet Express 3500 LS
1975-1988 Chevrolet G20 Beauville
1975-1988 Chevrolet G20 Chevy Van
1975-1988 Chevrolet G20 Sportvan
1978-1981 Chevrolet G20 Nomad
1983-1984 Chevrolet G20 Bonaventure
1972-1974 Chevrolet G20 Van Base
1972-1974 Chevrolet G20 Van Sportvan
1975-1996 Chevrolet G30 Beauville
1975-1996 Chevrolet G30 Chevy Van
1975-1996 Chevrolet G30 Hi-Cube
1975-1996 Chevrolet G30 Sportvan
1983-1984 Chevrolet G30 Bonaventure
1972-1974 Chevrolet G30 Van Base

…and 263 additional fitments. Contact us to confirm yours.

Product Details

Product Description
Part Numbers
Sizing & Fit

About ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Heavy-Duty Traction for GM 14-Bolt Axles

Transform your classic Chevy or GMC truck with the legendary ARB Air Locker, designed for the robust 10.5-inch 14-bolt full-float rear axle. This premium locking differential is the gold standard for off-road traction, offering the driver complete control over when to lock the axle. With a simple pneumatic activation, you can instantly lock your differential to conquer mud, snow, and uneven terrain, ensuring both wheels turn in unison for maximum grip.

Key Features and Performance

  • 100% Selectable: Engage or disengage the locker instantly via an in-cab switch.
  • Full-Float Compatibility: Engineered specifically for 30-spline 10.5-inch GM 14-bolt axles.
  • Durability: High-strength components designed to handle heavy loads and high-torque applications.
  • Versatility: Perfect for classic K20, C20, and G-series van builds requiring superior traction.

The ARB Air Locker works by pneumatically locking the side gears to the carrier, forcing both axle shafts to rotate at the same speed regardless of surface traction. This eliminates the limitations of an open differential, allowing you to traverse obstacles that would otherwise stop a standard truck. When unlocked, the differential returns to its open state, maintaining excellent road manners and tire wear characteristics. Whether you are restoring a vintage K20 or building a dedicated trail rig, this locker provides the reliability needed for heavy-duty use. Enhance your vehicle's off-road potential with this professional-grade differential solution from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2004 Chevrolet Avalanche 2500 Base
2005 Chevrolet Avalanche 2500 LS
2005 Chevrolet Avalanche 2500 LT
1975-1980 Chevrolet C20 Custom Deluxe
1975-1981 Chevrolet C20 Cheyenne
1975-1986 Chevrolet C20 Scottsdale
1975-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1972-1974 Chevrolet C20 Pickup Base
1973-1974 Chevrolet C20 Suburban Base
1975-1977 Chevrolet C20 Suburban Silverado
1975-1980 Chevrolet C20 Suburban Custom Deluxe
1975-1980 Chevrolet C20 Suburban Scottsdale
1979-1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1988-1992 Chevrolet C2500 Scottsdale
1988-1998 Chevrolet C2500 Cheyenne
1988-1998 Chevrolet C2500 Silverado
1994-1995 Chevrolet C2500 WT
1994-1997 Chevrolet C2500 Base
1998 Chevrolet C2500 WT
1999-2000 Chevrolet C2500 Base
1999-2000 Chevrolet C2500 LS
1992-1994 Chevrolet C2500 Suburban Silverado
1992-1999 Chevrolet C2500 Suburban Base
1995-1997 Chevrolet C2500 Suburban LT
1995-1999 Chevrolet C2500 Suburban LS
1975-1980 Chevrolet C30 Custom Deluxe
1975-1981 Chevrolet C30 Cheyenne
1975-1986 Chevrolet C30 Scottsdale
1975-1986 Chevrolet C30 Silverado
1981 Chevrolet C30 Deluxe
1981-1986 Chevrolet C30 Custom
1972-1974 Chevrolet C30 Pickup Base
1988-1992 Chevrolet C3500 Scottsdale
1988-1998 Chevrolet C3500 Cheyenne
1988-1998 Chevrolet C3500 Silverado
1994-1997 Chevrolet C3500 Base
1999-2000 Chevrolet C3500 Base
1999-2000 Chevrolet C3500 LS
1996-1998 Chevrolet Express 3500 Base
1996-1998 Chevrolet Express 3500 LS
1975-1988 Chevrolet G20 Beauville
1975-1988 Chevrolet G20 Chevy Van
1975-1988 Chevrolet G20 Sportvan
1978-1981 Chevrolet G20 Nomad
1983-1984 Chevrolet G20 Bonaventure
1972-1974 Chevrolet G20 Van Base
1972-1974 Chevrolet G20 Van Sportvan
1975-1996 Chevrolet G30 Beauville
1975-1996 Chevrolet G30 Chevy Van
1975-1996 Chevrolet G30 Hi-Cube
1975-1996 Chevrolet G30 Sportvan
1983-1984 Chevrolet G30 Bonaventure
1972-1974 Chevrolet G30 Van Base

…and 263 additional fitments. Contact us to confirm yours.

Product Details

Product Description

About ARB

ARB 4x4 Accessories is Australia's premier overland and 4x4 brand. From the legendary Air Locker selectable differentials to compressors, fridge-freezers, and recovery gear, ARB equips Toyota Land Cruisers, 4Runners, and Tacomas on every continent.

Watch in action

Heavy-Duty Traction for GM 14-Bolt Axles

Transform your classic Chevy or GMC truck with the legendary ARB Air Locker, designed for the robust 10.5-inch 14-bolt full-float rear axle. This premium locking differential is the gold standard for off-road traction, offering the driver complete control over when to lock the axle. With a simple pneumatic activation, you can instantly lock your differential to conquer mud, snow, and uneven terrain, ensuring both wheels turn in unison for maximum grip.

Key Features and Performance

  • 100% Selectable: Engage or disengage the locker instantly via an in-cab switch.
  • Full-Float Compatibility: Engineered specifically for 30-spline 10.5-inch GM 14-bolt axles.
  • Durability: High-strength components designed to handle heavy loads and high-torque applications.
  • Versatility: Perfect for classic K20, C20, and G-series van builds requiring superior traction.

The ARB Air Locker works by pneumatically locking the side gears to the carrier, forcing both axle shafts to rotate at the same speed regardless of surface traction. This eliminates the limitations of an open differential, allowing you to traverse obstacles that would otherwise stop a standard truck. When unlocked, the differential returns to its open state, maintaining excellent road manners and tire wear characteristics. Whether you are restoring a vintage K20 or building a dedicated trail rig, this locker provides the reliability needed for heavy-duty use. Enhance your vehicle's off-road potential with this professional-grade differential solution from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2004 Chevrolet Avalanche 2500 Base
2005 Chevrolet Avalanche 2500 LS
2005 Chevrolet Avalanche 2500 LT
1975-1980 Chevrolet C20 Custom Deluxe
1975-1981 Chevrolet C20 Cheyenne
1975-1986 Chevrolet C20 Scottsdale
1975-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1972-1974 Chevrolet C20 Pickup Base
1973-1974 Chevrolet C20 Suburban Base
1975-1977 Chevrolet C20 Suburban Silverado
1975-1980 Chevrolet C20 Suburban Custom Deluxe
1975-1980 Chevrolet C20 Suburban Scottsdale
1979-1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1988-1992 Chevrolet C2500 Scottsdale
1988-1998 Chevrolet C2500 Cheyenne
1988-1998 Chevrolet C2500 Silverado
1994-1995 Chevrolet C2500 WT
1994-1997 Chevrolet C2500 Base
1998 Chevrolet C2500 WT
1999-2000 Chevrolet C2500 Base
1999-2000 Chevrolet C2500 LS
1992-1994 Chevrolet C2500 Suburban Silverado
1992-1999 Chevrolet C2500 Suburban Base
1995-1997 Chevrolet C2500 Suburban LT
1995-1999 Chevrolet C2500 Suburban LS
1975-1980 Chevrolet C30 Custom Deluxe
1975-1981 Chevrolet C30 Cheyenne
1975-1986 Chevrolet C30 Scottsdale
1975-1986 Chevrolet C30 Silverado
1981 Chevrolet C30 Deluxe
1981-1986 Chevrolet C30 Custom
1972-1974 Chevrolet C30 Pickup Base
1988-1992 Chevrolet C3500 Scottsdale
1988-1998 Chevrolet C3500 Cheyenne
1988-1998 Chevrolet C3500 Silverado
1994-1997 Chevrolet C3500 Base
1999-2000 Chevrolet C3500 Base
1999-2000 Chevrolet C3500 LS
1996-1998 Chevrolet Express 3500 Base
1996-1998 Chevrolet Express 3500 LS
1975-1988 Chevrolet G20 Beauville
1975-1988 Chevrolet G20 Chevy Van
1975-1988 Chevrolet G20 Sportvan
1978-1981 Chevrolet G20 Nomad
1983-1984 Chevrolet G20 Bonaventure
1972-1974 Chevrolet G20 Van Base
1972-1974 Chevrolet G20 Van Sportvan
1975-1996 Chevrolet G30 Beauville
1975-1996 Chevrolet G30 Chevy Van
1975-1996 Chevrolet G30 Hi-Cube
1975-1996 Chevrolet G30 Sportvan
1983-1984 Chevrolet G30 Bonaventure
1972-1974 Chevrolet G30 Van Base

…and 263 additional fitments. Contact us to confirm yours.

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