ARB Air Lockers for Range Rover & Land Rover

Other Applications:
Hummer, Chevrolet and GMC
Chrysler and Jeep
Dodge
Ford
Range Rover and Land Rover
Toyota and Lexus

The ARB Air Locking Differential is a complete system. All components are designed & manufactured to ensure reliability, durability and ease of fitment.

The ARB Air Locking Differential is a complete system. All components are designed & manufactured to ensure reliability, durability and ease of fitment. Complete, front & rear system shown.

Driver activated, on demand.

Control switches mount neatly into the dash or console for easy, push button operation.

ARB's World Renowned
Air Locker Locking Differential.

HOW THE AIR LOCKER WORKS: The ARB Air Locker is an air operated, driver controlled differential lock activated by pushing a dash mounted button.

When the dash mounted button is pushed, compressed air, delivered by the ARB 12 volt, on board air compressor is passed via a 12 volt solenoid down an air line into the differential housing. The air travels into the differential center via a specially designed seal housing which seals against an extended bearing spigot.

Via air galleries, the compressed air enters the piston chamber and actuates the piston and clutch gear, moving the gear into the locked position. The clutch gear now locks the side gear to the differential housing instantly stopping any differential action. The diff is now 100% locked, and both axles will deliver 100% traction.

To disengage the differential the dash mounted switch is again pushed, which releases the compressed air via the solenoid and the piston springs return the piston to its original position. The differential is then fully open allowing full, standard differential action.

The ARB Air Locker only takes a split second to engage, making it the only, truly, driver controlled, differential locking system.

Application Chart
All Bumpers shipped truck freight. Shipping is free within the continental United States on items with a delivered price.

Range Rover/Land Rover

Range Rover	Front	To 1993	Rover type	28.2 (1.11”)	10	3.54	RD03^1,4Call for best pricing 918 446-5553
		1993-98	Rover type	31.5 (1.24”)	24	3.54	RD56^1,5Call for best pricing 918 446-5553
		1998 on	Rover type, w/ traction control	31.5 (1.24”)	24	3.54	RD57⁵Call for best pricing 918 446-5553
	Rear	To 1993	Rover type	28.2 (1.11”)	10	3.54	RD03^1,4Call for best pricing 918 446-5553
		1993-98	Rover type	31.5 (1.24”)	24	3.54	RD56^1,5Call for best pricing 918 446-5553
		1998 on	Rover type, w/ traction control	31.5 (1.24”)	24	3.54	RD57⁵Call for best pricing 918 446-5553
Discovery	Front	To 1993	Rover type	28.2 (1.11”)	10	3.54	RD03¹Call for best pricing 918 446-5553
	Front	1993-98	Rover type	31.5 (1.24”)	24	3.54	RD56^1,5Call for best pricing 918 446-5553
	Rear	To 1993	Rover type	28.2 (1.11”)	10	3.54	RD03¹Call for best pricing 918 446-5553
	Rear	1993-98	Rover type	31.5 (1.24”)	24	3.54	RD56^1,5Call for best pricing 918 446-5553
Discovery Series II	Front	All	Rover type	31.5 (1.24”)	24	3.54	RD56 Call for best pricing 918 446-5553
Discovery Series II	Rear	All	Rover type	31.5 (1.24”)	24	3.54	RD56Call for best pricing 918 446-5553
Defender 110, 130, & County	Front	1983-93	Rover type	28.2 (1.11”)	10	3.54	RD03¹Call for best pricing 918 446-5553
	Front	1993-98	Rover type	31.5 (1.24”)	24	3.54	RD56^1,5Call for best pricing 918 446-5553
	Rear	1983-98	Salisbury type	31.5 (1.24”)	24	3.54	RD20 Call for best pricing 918 446-5553
Defender 90, County	Front	1984-93	Rover type	28.2 (1.11”)	10	3.54	RD03¹Call for best pricing 918 446-5553
	Front	1993 on	Rover type	31.5 (1.24”)	24	3.54	RD56^1,5Call for best pricing 918 446-5553
	Rear²	1983-93	Rover type, 4 cyl. petrol & diesel engines	28.2 (1.11”)	10	3.54	RD03¹Call for best pricing 918 446-5553
		To 1993	Rover type, V8 petrol engine	31.5 (1.24”)	24	3.54	RD26¹Call for best pricing 918 446-5553
		1993 on	Rover type	31.5 (1.24”)	24	3.54	RD56¹Call for best pricing 918 446-5553
LWB models V8 engine	Front	1979-83	Rover type	28.2 (1.11”)	10	3.54	RD03 Call for best pricing 918 446-5553
	Front	1979-83	Salisbury type	31.5 (1.24”)	24	3.54	RD20 Call for best pricing 918 446-5553
	Rear	1979-83	Salisbury type	31.5 (1.24”)	24	3.54	RD20 Call for best pricing 918 446-5553
Series III, Series II, Series I	Front	1948-85	Rover type	28.2 (1.11”)	10	4.7	RD03^2,3Call for best pricing 918 446-5553
	Front	1948-85	Salisbury type	31.5 (1.24”)	24	4.7	RD32Call for best pricing 918 446-5553
	Rear	1948-85	Rover type	28.2 (1.11”)	10	4.7	RD03^2,3Call for best pricing 918 446-5553
	Rear	1948-85	Salisbury type	31.5 (1.24”)	24	4.7	RD32 Call for best pricing 918 446-5553

Range Rover/Land Rover Notes:¹ If vehicle was manufactured during 1993, check spline count.² Air Locker not available for vehicles equipped with high load option.³ RD03A crown wheel spacer required. Longer crown wheel fixing bolts (not supplied) are also necessary - (Land Rover part no. 576521.)⁴ When an RD03 Air Locker is to be installed in Range Rovers manufactured prior to 1980 (approx.), special carrier bearings (No. K11300/K11162) may also be necessary - Land Rover part no. RTC3426.⁵ Some vehicles have crown wheel bolts which cannot be reused and, therefore, must be replaced

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