ARB Air Locker RD175 - Ford F450/550 Pickup, E/F350 Dually

The ARB Air Locker RD175 is an air operated locking differential for the Dana 70/80,37 SPL,HIGH SPEED axle. An Air Locker is matched to the axle, not to the car model, so axle type, axle shaft spline count and ring & pinion ratio decide which model fits. The list below comes straight from the ARB application chart.

Key features

• ARB part number: RD175
• Axle: Dana 70/80,37 SPL,HIGH SPEED
• Axle shaft splines: 37
• Ratio range: xxx & DN
• Supersedes: RD91

Fitment per the ARB application chart

• Chevrolet 3500 HD – rear axle (3.73 & DN)
• Dodge 300, 350, 400, B, C, M, W – rear axle (40.6 (1.60"))
• Dodge RAM 2500, 3500 – rear axle (3.73 & DN)
• Ford E/F350 Dually – rear axle (3.73 & DN)

Specifications

• ARB part number: RD175

Szekla4x4.pl is an online shop, a walk-in store and a workshop specialising in off-road and overlanding. If you would like us to fit this for you or match the rest of the setup, get in touch.

Frequently asked questions

How do I know which locker fits my vehicle?

By axle type and axle shaft spline count, and for some axles also by the ring and pinion ratio. The model year alone is not enough – the same model was built with different axles.

Do I need an air compressor?

Yes. An Air Locker runs on compressed air, so a compressor and a switch kit are required.

Not sure which axle your vehicle has? Get in touch – we will check the ARB chart by spline count and ratio, and we can fit the locker for you.