ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed
ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed

ARB Selectable Air Locker Dana 70/80, 35-Spline, High Speed

SKU: ARBRD173

$1,499.95
/
Shipping calculated at checkout.

The ARB RD173 Air Locker is engineered for applications running numerically lower gear ratios, making it ideal for heavy duty tow rigs, expedition vehicles, and mixed use off-road builds.

With the flip of a dash mounted switch, compressed air activates the pneumatically operated locking mechanism inside the differential, preventing the axle shafts from rotating independently. This fully locks both wheels to the ring gear for maximum traction when needed. When disengaged, the differential operates like a standard open unit, allowing smooth handling, reduced driveline wear, and safer operation.

Important Note: For Dana 80 applications, the Air Locker flange holes must be drilled or reamed to accept 9/16" bolts. Always consult your gear supplier to confirm correct application.

Specifications
  • Brand: ARB
  • Differential Type: Selectable locking differential
  • Speed Rating: High Speed
  • Spline Count: 35-spline
  • Shaft Diameter: 1.50
  • Material: Steel
  • Finish / Color: Silver
  • Activation: Pneumatic (air operated)
    Includes:
  • ARB Air Locker differential
  • Dash activation switch
  • Solenoid valve
  • Air line
  • Bulkhead fitting
  • Air compressor required for operation (sold separately).
Fitment
  • Rear Axle Applications
  • Dana 70 Full Float 10.5"
  • 35-spline, 1.50" shaft
  • Gear ratio: 4.10 & down
  • Dana 80 Full Float 11.5"
  • 35-spline, 1.50" shaft
  • Gear ratios: 3.73 & down
  • Gear ratios: 4.10 & up
  • Dana 80 Full Float 11.5"
  • 37-spline, 1.50" shaft
  • Gear ratios: 3.73 & down
  • Gear ratios: 4.10 & up

    Front Axle Applications:
  • Dana 70
  • 35 spline, 1.50" shaft
  • Gear ratio: 4.10 & down
  • Verify fitment before ordering. Differentials are not one-size-fits-all.
Tech Insight

ARB’s patented locking system supports the side gear teeth directly, providing increased torque handling exactly when needed. The two-piece design minimizes moving parts while maximizing strength and reliability. A steel reinforced, elastomer bonded annular seal has been proven to withstand 20,000+ engagement cycles in extreme climates.

The high speed Air Locker is optimized for lower numerical gear ratios, making it a strong choice for highway driven rigs that still demand dependable off-road traction.

Key Design Features:

  • Bonded Annular Seal – Steel reinforced for extreme temperature durability
  • Flange Cap Assembly – Billet-machined alloy steel spider block
  • Splined Side Gears – Forged nickel alloy steel with surface treatments
  • Wave Spring System – Up to 12 return springs for fast, positive disengagement
  • Clutch Gear Design – Patented timed locking for superior torque transfer
  • Long Cross Shaft – High-pressure running fit for extreme abuse
Technical Resources

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