ARB Air Locker 31-Spline Ford 8.8in Differential — Fits 1983-1987 Ford Trucks

SKU: ARBRD81
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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

Legendary Traction for Ford 8.8in Axles

Revitalize your classic Ford truck with the ARB Air Locker, specifically engineered for the Ford 8.8-inch 31-spline differential. Whether you are restoring a vintage Bronco or building a trail-ready F-150, this locker provides the mechanical advantage needed to conquer challenging terrain. By locking the differential gears pneumatically, you eliminate wheel spin and ensure that power is effectively transferred to the ground, even when one wheel is suspended in the air.

Performance Benefits

  • Selectable Locking: Enjoy the benefits of an open differential on the road and a locked axle off-road.
  • 31-Spline Strength: Designed to handle the increased power demands of upgraded engines and larger tire sizes.
  • Reliable Design: ARB’s proven air-actuated system is built to last, providing years of trouble-free service.
  • Seamless Integration: Fits perfectly into existing Ford 8.8-inch housings, making it an ideal upgrade for classic truck enthusiasts.

The beauty of the ARB Air Locker lies in its simplicity and effectiveness. When you are not on the trail, the unit operates like a standard open differential, preserving your tires and ensuring smooth cornering. When the terrain gets tough, the flick of a switch engages the locking mechanism, providing the traction required to navigate mud, sand, or rocky trails. This is the ultimate upgrade for any Ford owner looking to improve their vehicle's off-road capabilities without sacrificing daily drivability. Elevate your driving experience with quality parts from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1990-1994 Ford Aerostar Eddie Bauer
1990-1994 Ford Aerostar XL
1990-1994 Ford Aerostar XL Plus
1990-1997 Ford Aerostar Base
1990-1997 Ford Aerostar XLT
1990-1997 Ford Aerostar XLT Plus
1991-1994 Ford Aerostar XL Sport
1991-1997 Ford Aerostar XLT Sport
1983 Ford Bronco XLS
1983 Ford Bronco XLT Lariat
1983-1993 Ford Bronco Custom
1984-1992 Ford Bronco XLT
1985-1996 Ford Bronco Eddie Bauer
1990-1996 Ford Bronco XL
1992 Ford Bronco XLT Nite
1993 Ford Bronco XLT Lariat
1994-1996 Ford Bronco XLT
1995-1996 Ford Bronco XLT Sport
1984-1985 Ford Bronco II XLS
1984-1986 Ford Bronco II Base
1984-1990 Ford Bronco II XLT
1984-1990 Ford Bronco II Eddie Bauer
1987-1990 Ford Bronco II XL
1988-1990 Ford Bronco II XL Sport
1989-1990 Ford Bronco II XLT Plus
2003-2005 Ford Crown Victoria S
2003-2008 Ford Crown Victoria Base
2003-2009 Ford Crown Victoria LWB
2003-2011 Ford Crown Victoria LX
2003-2011 Ford Crown Victoria Police Interceptor
2004-2006 Ford Crown Victoria LX Sport
2005 Ford Crown Victoria Special Edition
2006-2009 Ford Crown Victoria Fleet
2010-2011 Ford Crown Victoria Base
1983 Ford E-100 Econoline Custom
1983 Ford E-100 Econoline XL
1983 Ford E-100 Econoline Club Wagon Custom
1983 Ford E-100 Econoline Club Wagon XL
2003-2014 Ford E-150 Base
2006-2007 Ford E-150 Chateau
2006-2014 Ford E-150 XL
2006-2014 Ford E-150 XLT
2003-2005 Ford E-150 Club Wagon Chateau
2003-2005 Ford E-150 Club Wagon XL
2003-2005 Ford E-150 Club Wagon XLT
1983 Ford E-150 Econoline Custom
1983-2000 Ford E-150 Econoline XL
1984-1986 Ford E-150 Econoline Base
1987-1991 Ford E-150 Econoline Custom
1992-2002 Ford E-150 Econoline Base
1983 Ford E-150 Econoline Club Wagon Custom
1983-1991 Ford E-150 Econoline Club Wagon XL
1984-1986 Ford E-150 Econoline Club Wagon Base
1984-2002 Ford E-150 Econoline Club Wagon XLT
1987-2000 Ford E-150 Econoline Club Wagon Custom
1992-2002 Ford E-150 Econoline Club Wagon Chateau
2001-2002 Ford E-150 Econoline Club Wagon XL
1983 Ford E-250 Econoline Custom
1983-1999 Ford E-250 Econoline XL
1984-1986 Ford E-250 Econoline Base

…and 85 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

Legendary Traction for Ford 8.8in Axles

Revitalize your classic Ford truck with the ARB Air Locker, specifically engineered for the Ford 8.8-inch 31-spline differential. Whether you are restoring a vintage Bronco or building a trail-ready F-150, this locker provides the mechanical advantage needed to conquer challenging terrain. By locking the differential gears pneumatically, you eliminate wheel spin and ensure that power is effectively transferred to the ground, even when one wheel is suspended in the air.

Performance Benefits

  • Selectable Locking: Enjoy the benefits of an open differential on the road and a locked axle off-road.
  • 31-Spline Strength: Designed to handle the increased power demands of upgraded engines and larger tire sizes.
  • Reliable Design: ARB’s proven air-actuated system is built to last, providing years of trouble-free service.
  • Seamless Integration: Fits perfectly into existing Ford 8.8-inch housings, making it an ideal upgrade for classic truck enthusiasts.

The beauty of the ARB Air Locker lies in its simplicity and effectiveness. When you are not on the trail, the unit operates like a standard open differential, preserving your tires and ensuring smooth cornering. When the terrain gets tough, the flick of a switch engages the locking mechanism, providing the traction required to navigate mud, sand, or rocky trails. This is the ultimate upgrade for any Ford owner looking to improve their vehicle's off-road capabilities without sacrificing daily drivability. Elevate your driving experience with quality parts from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1990-1994 Ford Aerostar Eddie Bauer
1990-1994 Ford Aerostar XL
1990-1994 Ford Aerostar XL Plus
1990-1997 Ford Aerostar Base
1990-1997 Ford Aerostar XLT
1990-1997 Ford Aerostar XLT Plus
1991-1994 Ford Aerostar XL Sport
1991-1997 Ford Aerostar XLT Sport
1983 Ford Bronco XLS
1983 Ford Bronco XLT Lariat
1983-1993 Ford Bronco Custom
1984-1992 Ford Bronco XLT
1985-1996 Ford Bronco Eddie Bauer
1990-1996 Ford Bronco XL
1992 Ford Bronco XLT Nite
1993 Ford Bronco XLT Lariat
1994-1996 Ford Bronco XLT
1995-1996 Ford Bronco XLT Sport
1984-1985 Ford Bronco II XLS
1984-1986 Ford Bronco II Base
1984-1990 Ford Bronco II XLT
1984-1990 Ford Bronco II Eddie Bauer
1987-1990 Ford Bronco II XL
1988-1990 Ford Bronco II XL Sport
1989-1990 Ford Bronco II XLT Plus
2003-2005 Ford Crown Victoria S
2003-2008 Ford Crown Victoria Base
2003-2009 Ford Crown Victoria LWB
2003-2011 Ford Crown Victoria LX
2003-2011 Ford Crown Victoria Police Interceptor
2004-2006 Ford Crown Victoria LX Sport
2005 Ford Crown Victoria Special Edition
2006-2009 Ford Crown Victoria Fleet
2010-2011 Ford Crown Victoria Base
1983 Ford E-100 Econoline Custom
1983 Ford E-100 Econoline XL
1983 Ford E-100 Econoline Club Wagon Custom
1983 Ford E-100 Econoline Club Wagon XL
2003-2014 Ford E-150 Base
2006-2007 Ford E-150 Chateau
2006-2014 Ford E-150 XL
2006-2014 Ford E-150 XLT
2003-2005 Ford E-150 Club Wagon Chateau
2003-2005 Ford E-150 Club Wagon XL
2003-2005 Ford E-150 Club Wagon XLT
1983 Ford E-150 Econoline Custom
1983-2000 Ford E-150 Econoline XL
1984-1986 Ford E-150 Econoline Base
1987-1991 Ford E-150 Econoline Custom
1992-2002 Ford E-150 Econoline Base
1983 Ford E-150 Econoline Club Wagon Custom
1983-1991 Ford E-150 Econoline Club Wagon XL
1984-1986 Ford E-150 Econoline Club Wagon Base
1984-2002 Ford E-150 Econoline Club Wagon XLT
1987-2000 Ford E-150 Econoline Club Wagon Custom
1992-2002 Ford E-150 Econoline Club Wagon Chateau
2001-2002 Ford E-150 Econoline Club Wagon XL
1983 Ford E-250 Econoline Custom
1983-1999 Ford E-250 Econoline XL
1984-1986 Ford E-250 Econoline Base

…and 85 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

Legendary Traction for Ford 8.8in Axles

Revitalize your classic Ford truck with the ARB Air Locker, specifically engineered for the Ford 8.8-inch 31-spline differential. Whether you are restoring a vintage Bronco or building a trail-ready F-150, this locker provides the mechanical advantage needed to conquer challenging terrain. By locking the differential gears pneumatically, you eliminate wheel spin and ensure that power is effectively transferred to the ground, even when one wheel is suspended in the air.

Performance Benefits

  • Selectable Locking: Enjoy the benefits of an open differential on the road and a locked axle off-road.
  • 31-Spline Strength: Designed to handle the increased power demands of upgraded engines and larger tire sizes.
  • Reliable Design: ARB’s proven air-actuated system is built to last, providing years of trouble-free service.
  • Seamless Integration: Fits perfectly into existing Ford 8.8-inch housings, making it an ideal upgrade for classic truck enthusiasts.

The beauty of the ARB Air Locker lies in its simplicity and effectiveness. When you are not on the trail, the unit operates like a standard open differential, preserving your tires and ensuring smooth cornering. When the terrain gets tough, the flick of a switch engages the locking mechanism, providing the traction required to navigate mud, sand, or rocky trails. This is the ultimate upgrade for any Ford owner looking to improve their vehicle's off-road capabilities without sacrificing daily drivability. Elevate your driving experience with quality parts from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1990-1994 Ford Aerostar Eddie Bauer
1990-1994 Ford Aerostar XL
1990-1994 Ford Aerostar XL Plus
1990-1997 Ford Aerostar Base
1990-1997 Ford Aerostar XLT
1990-1997 Ford Aerostar XLT Plus
1991-1994 Ford Aerostar XL Sport
1991-1997 Ford Aerostar XLT Sport
1983 Ford Bronco XLS
1983 Ford Bronco XLT Lariat
1983-1993 Ford Bronco Custom
1984-1992 Ford Bronco XLT
1985-1996 Ford Bronco Eddie Bauer
1990-1996 Ford Bronco XL
1992 Ford Bronco XLT Nite
1993 Ford Bronco XLT Lariat
1994-1996 Ford Bronco XLT
1995-1996 Ford Bronco XLT Sport
1984-1985 Ford Bronco II XLS
1984-1986 Ford Bronco II Base
1984-1990 Ford Bronco II XLT
1984-1990 Ford Bronco II Eddie Bauer
1987-1990 Ford Bronco II XL
1988-1990 Ford Bronco II XL Sport
1989-1990 Ford Bronco II XLT Plus
2003-2005 Ford Crown Victoria S
2003-2008 Ford Crown Victoria Base
2003-2009 Ford Crown Victoria LWB
2003-2011 Ford Crown Victoria LX
2003-2011 Ford Crown Victoria Police Interceptor
2004-2006 Ford Crown Victoria LX Sport
2005 Ford Crown Victoria Special Edition
2006-2009 Ford Crown Victoria Fleet
2010-2011 Ford Crown Victoria Base
1983 Ford E-100 Econoline Custom
1983 Ford E-100 Econoline XL
1983 Ford E-100 Econoline Club Wagon Custom
1983 Ford E-100 Econoline Club Wagon XL
2003-2014 Ford E-150 Base
2006-2007 Ford E-150 Chateau
2006-2014 Ford E-150 XL
2006-2014 Ford E-150 XLT
2003-2005 Ford E-150 Club Wagon Chateau
2003-2005 Ford E-150 Club Wagon XL
2003-2005 Ford E-150 Club Wagon XLT
1983 Ford E-150 Econoline Custom
1983-2000 Ford E-150 Econoline XL
1984-1986 Ford E-150 Econoline Base
1987-1991 Ford E-150 Econoline Custom
1992-2002 Ford E-150 Econoline Base
1983 Ford E-150 Econoline Club Wagon Custom
1983-1991 Ford E-150 Econoline Club Wagon XL
1984-1986 Ford E-150 Econoline Club Wagon Base
1984-2002 Ford E-150 Econoline Club Wagon XLT
1987-2000 Ford E-150 Econoline Club Wagon Custom
1992-2002 Ford E-150 Econoline Club Wagon Chateau
2001-2002 Ford E-150 Econoline Club Wagon XL
1983 Ford E-250 Econoline Custom
1983-1999 Ford E-250 Econoline XL
1984-1986 Ford E-250 Econoline Base

…and 85 additional fitments. Contact us to confirm yours.

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