ARB Dana 44 30 Spline 3.73 Ratio Down Air Locking Differential - RD117 |

ARB Dana 44 30 Spline 3.73 Ratio Down Air Locking Differential - RD117

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  • ARB 4x4 Accessories | Part Number: ARBRD117
  • Popular Axle Manufacture:Dana
  • Axle Location:Front|Rear
  • Axle Type:Dana 44
  • Fitment:Universal Fit
  • Axle Spline:30 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.

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Question & Answers

2 Answered questions

Q: i notice that ARB has 2 lockers for the JK rear 44 w/ 30 spline, one is 3.92 & up and the other is 3.73 & down. I currently have the stock 3.73 gears and i just want to add the locker to the rear for now, later upgrading the front axle and gearing lower. If I purchase the 3.73 & lower locker now would I be able to fit it with a lower gear or would i have to purchase the other locker (3.92 & up) to fit the lower gear? Answer this question

A: Hello The standard JK Dana 44 rear non Rubicon will use only the RD117. All of the rear gears for the JK are designed to go on the 373 and down carrier / lockers. The only other would unit would be the RD147 if you wanted to upgrade to 35 spline axles. Thanks

Answered by Rody on 08/07/2015

Q: I bought the arb lockers and 488 gears from yall for Dana 30 in front and 44 in rear and I was goin to try to install myself after reading instructions I will not be doing the install so my question is what do yall charge for the install? Answer this question

A: Hello The labor rates vary from state to state. The best bet would be to call the local store and get the local price. Their number is 901-377-0323 Thanks

Answered by Rody on 04/12/2015


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