ARB Air Locker Differential – GM 8.5in 10-Bolt / AAM 860, 30 Spline (Part #RD222)
Instant Traction With The Flip Of A Switch
You have a GM truck or SUV with an 8.5-inch 10-bolt rear axle. You take it off-road. You get stuck. One wheel spins. The other does nothing. You are dead in the water. You need traction. You need a locker.This is the ARB Air Locker. Part #RD222. Fits GM 8.5-inch and 8.6-inch 10-bolt rear axles as well as AAM 860 axles with 30-spline axle shafts .ARB invented the Air Locker in the early 1980s . It is the world's premier traction aid . With the flick of a switch, you get instant 100% lock-up at any speed . When unlocked, it operates like a conventional open differential . No effect on road manners. No added driveline wear.How It Works
The Air Locker is a pneumatically operated locking differential that replaces your factory open carrier . When you activate the switch, compressed air engages a locking mechanism inside the differential. The internal differential gears stop rotating. Both axle shafts are locked together . Both wheels spin at the same speed. Maximum traction.The ARB Air Locker is engineered with minimal moving parts, making it ultra-durable and extremely strong . A patented timed locking mechanism offers high strength and ultra-fast unlocking . The steel-reinforced, elastomer-bonded annular seal is designed to handle extreme temperatures . It is built to survive the toughest terrain.What Is In The Box
Complete Air Locker differential. Activation switch. Solenoid valve. Air line. Bulkhead fitting. Installation hardware. Important: An ARB Air Compressor is required for operation and is sold separately . ARB strongly recommends using their own compressor for reliability. The Air Locker requires a minimum of 85 PSI of clean, dry air .Vehicle Fitment
Exact fit for:- GM 8.5-inch and 8.6-inch 10-bolt rear axles
- AAM 860 rear axles
- 30-spline axle shafts
- 1.31-inch axle shaft diameter
- Works with gear ratios 2.73 and up
Common applications include:- 1987-2005 Chevrolet Blazer
- 2009-2012 Chevrolet Colorado
- 1982-1995 Chevrolet G10
- 1988-1999 Chevrolet K1500
- 1995-2008 Chevrolet Tahoe
- 2009-2012 GMC Canyon
- 1988-1999 GMC K1500
- 1992-2008 GMC Yukon
- 2006-2009 Hummer H3
- 2009-2010 Hummer H3T
FAQ
Do I need an air compressor for this locker?
Yes. An ARB Air Compressor is required. The locker is pneumatically activated and needs a clean, pressurized air source of at least 85 PSI .Is this a selectable locker?
Yes. You control it with a switch. Open when unlocked. Locked when engaged. Best of both worlds .Will this fit my 1999 Chevy Silverado 1500?
If your truck has a GM 10-bolt 8.5/8.6-inch rear axle with 30-spline shafts, yes. Confirm your axle type before ordering.Does this fit both 28 and 30-spline axles?
This locker is for 30-spline axles. Verify your spline count before ordering. Some GM 10-bolts came with 28-spline shafts .Does this include the air compressor?
No. This is the locker only. The air compressor, fittings, and switch are sold separately.[NB: Last Chance Deals item : Limited stock. Please confirm fitment before ordering. No returns on incorrect orders. Transit damage claims only.]
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Charles Harris –
ARB locker is in a class of its own. instant engagement, silent when open. Best traction upgrade I’ve ever done to a truck.
RENUKA KASILAL –
Installed the ARB Air Locker in my GM 8.5-inch rear axle before a major off-road trip and it performed exactly as ARB’s reputation promised. Locked traction on challenging terrain is transformative, places that used to require multiple attempts I now drive through without hesitation. On the street it’s completely transparent. Drives like an open diff until you need it. The air system integration is clean and reliable. My off-road instructor said ARB lockers are what he recommends to anyone serious about wheeling. I understand why.
Prescott Ainsworth –
Had this ARB Air Locker installed in my GM 8.5 10-bolt before a big off-road trip and it made a massive difference in traction on loose terrain. Engagement is instant with the flip of the switch, and it stays completely unnoticeable during normal street driving when disengaged. My installer commented on how clean the internal fit and finish was compared to some other lockers he’s worked with. Climbed obstacles I would have been stuck on with an open diff. Air line routing was straightforward with the included compressor kit. Excellent locker for a serious build.