The ARB Air Locker RD99CE is a competition-grade, driver-selectable locking differential for the Ford 9" housing with a 35-spline centre and 2" carrier bearings. Flick the dash switch and an open axle becomes 100% locked for maximum traction; release it and the differential behaves exactly like a factory open unit for safe, predictable street driving.
This Competition Edition uses ARB's forged four-pinion centre and a heavy-duty design aimed at high-horsepower, big-tyre race and rock builds. Air-operated engagement through an ARB on-board compressor is instant and repeatable, with no speed, load, or ratcheting compromises.
Specifications
| Attribute | Detail |
|---|---|
| Differential / housing | Ford 9" |
| Spline count | 35 |
| Carrier bearing | 2" |
| Series | Air Locker Competition Edition |
| Engagement | Air-operated, driver-selectable (100% locking) |
| Brand / MPN | ARB / RD99CE |
Fitment note: Air Lockers are selected by differential and spline count, not by year/make/model — confirm your Ford 9" carrier is 35-spline with 2" bearings before ordering.
Requires an ARB air source (on-board compressor or CKMA/CKMTA kit) and an installation kit. Backed by ARB's limited warranty.
Prop 65 WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm. See www.P65Warnings.ca.gov.
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