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ARB Ford 8.8 Inch 31 Spline Air Locking Differential - RD81

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  • ARB 4x4 Accessories | Part Number: ARBRD81
  • Popular Axle Manufacture:Ford
  • Axle Location:Rear
  • Axle Type:Ford 8.8 Inches
  • Fitment:Universal Fit
  • Axle Spline:31 Splines
  • Differential Type:Selectable Locker


The ARB Air Locker is a pneumatic locking differential that uses air to facilitate the locking of both axles. This action converts your differential from a conventional open to a full spool type axle supplying 100% power to both wheels to keep you going through the worst terrain. ARB onboard air compressor required to activate Air Lockers. Sold Separately.




Question & Answers

2 Answered questions

can I use my stock c clip axle

Asked by chuck from US st louis mo on

Hello Chuck, As long as you have the ford 8.8 axle yes this will work for your application. If you have anymore questions feel free to ask, Thank you.

Answered by JordanC extension 833 from US st louis mo on

Please just confirm for me... the ARB lockers come with a switch, airline & selonoid in the box?? I have the compressor for my front ARB locker, but purchased that one used from a friend. I see it in the picture...but just want to make sure.

Asked by Nick from Camp Pendleton, CA on

Nick just to be 100% sure I checked with ARB. This kit includes the replacement differential, activation switch, solenoid valve, air line and bulkhead fittings. So it sounds like you are in good shape.

Answered by Jason L from Camp Pendleton, CA on


ARB has been manufacturing 4x4 parts for over 40 years. ARB Air Lockers will amplify the traction of your 4x4 on challenging trails. They give the off-road driver what she needs in traction, control and performance. ARB believes in its products so it offers a five year, unlimited mile warranty across the air locker range. ARB 4x4 Accessories includes the suspension system brand Old Man Emu, maker of premium off-road shock absorbers. Old Man Emu premium shocks are developed and tuned specifically for each vehicle application. They come complete with vehicle specific mounting kits for fuss free installation. ARB parts are all developed, engineered and fabricated in-house in Australia. Shop ARB 4x4 Accessories Now