ARB Air Locker Locking Differential for 00-09 GM & Dodge 2500/3500 Trucks with Rear 30 Spline AAM 11.5 Axle

ARB's patented 2-piece case design is manufactured from heavy cross sectioned nodular iron castings for
virtually unbreakable strength and has been designed so that the side gears can be optionally upgraded to 35,
37 and 40 spline shafts. These higher splined side gears will be available in spring 2010.
As with all of ARB's Performance Lockers, the RD139 features ARB's patented Timed Gear Technology, which
offers the highest locking strength while maintaining split-second unlocking ability. The steel reinforced, bonded
seal has been designed to handle the most extreme climactic temperatures on earth complementing the
competition bred strength of the locker.
The RD139 is a huge locker that can handle huge power. How much power? Our computer modeling
suggests that this locker will handle upwards of 5 times more torque than the OE differential. We had to
increase the torque load for two reasons - first, to handle the extreme load generated by the extra traction
achieved when this differential is locked, and second, so that ARB could offer future swap-in axle
upgrades to higher torque shafts.
We can honestly say that the RD139 will not be the weak link in your drive train.

• Provides 100% traction on demand without affecting on road drivability or driveline wear.
• Vastly improved traction means less reliance on momentum, thus reducing the likelihood of vehicle damage and environmental impact.
• Easy, convenient operation allows the user to concentrate on the terrain without leaving the comfort and safety of the driver's seat.
• Ultra durable and extremely strong - only the highest quality materials used in construction.
• Incredibly simple yet effective design that employs minimal moving parts, thereby ensuring

maximum reliability.

• Thoroughly tested and proven design & trusted and used in over 80 countries around the world.
• Front and rear Air Lockers available for most makes and models.
• 2WD applications available.
• Easy installation and maintenance & no special tools, skills or additives required.
• Air compressor also provides convenient, reliable source of air for inflating tyres, camping and leisure equipment.

Installation Notes

Installation Difficulty:

Level 4Experts Only

Parts Included

Locking Differential
Carrier Bearings
Switch
Air Line
Solenoid

Warranty

3 Year Limited Warranty