ARB Air Locker Stock Photo - not specific to each product

Ships FREE !!
within 48 US States

ARB RD121 Front Air Locker Toyota Lexus 8″ IFS 30 Spline 3.73-

For Use With Toyota 8″ IFS Clamshell differential with 30 Spline Axles and 3.73 And Down Factory Gears
Usually all models that came with a manual transmission used 3.73- factory gear ratios, but you must check before ordering
Factory R&P may use either RD111 or RD121 depending on ratio. All known aftermarket R&P sets suit RD121.
If you are re-gearing, check with the gear manufacturer for which Air Locker to order
Full vehicle fitment list is further down in the main description, includes 4Runner, Tacoma, FJ Cruiser, GX470, GX460
At the flick of a dash-mounted switch, compressed air is delivered to the seal housing assembly via a nylon air line.
Instantaneously go from an open differential to a fully locked differential at the flick of a switch for maximum traction
Requires an Air Compressor for operation, Sold Separately
Why do they use air? Air is used on every semi truck on the road to reliably operate their brakes through solenoids, and ARB uses the same technology. When installed correctly, it’s ultra-reliable!!
The ARB Air Locker is a pneumatic locking differential that uses air to facilitate the locking of both axles. This action converts your differential from a conventional open to a full spool type axle supplying 100% power to both wheels to keep you going through the worst terrain.
This Air Locker kit includes the full differential, instruction booklet, airline, fittings, switch and cover, and necessary seals. When combined with an Air Compressor and the original differential, you’ll have everything you need as far as parts go.
Full specification sheet, including all included parts, CLICK HERE
It’s recommended that a qualified differential mechanic do the installation for proper setup
Covered by a full manufacturer’s 5 YEAR WARRANTY

$1,091.00

In Stock

Description
Additional information

Description

ARB RD121 Front Air Locker

GTIN: 00881348006905

ARB RD121 Front Air Locker Toyota Lexus 8″ IFS 30 Spline 3.73 and down numerically is made for a wide variety of Toyota and Lexus vehicles that use the 8″ front differential.

The ARB Toyota 8″ IFS air locker RD121 for your 30 spline axle for 3.73 & down gear ratios, can instantly lock differentials and allow you to tackle the toughest off-road terrain. The world’s best traction aid, ARB Air Lockers keep you moving in all conditions.

Factory R&P may use either RD111 or RD121 depending on ratio. All known aftermarket R&P sets suit RD121.

Air Lockers from ARB are currently available in over 100 configurations to suit a wide range of off-road and 4×4 vehicles from around the world. Because the Toyota 8″ IFS ARB RD121 air locker is only engaged when needed, it can be installed in BOTH the front and rear axles, with separate switches independently controlling the RD121 air locker from within the off-road truck or vehicle.

Installation of the ARB RD121 air locker should be performed by a qualified differential technician, although no special tools or skills are required apart from those necessary for fitting a standard differential. When installed with an ARB air compressor (high output or mini), the ARB RD121 – Toyota 8″ IFS locker system is supplied as a complete kit which contains all of the parts necessary for proper installation, including industrial grade control switches, air lines and fittings. ARB offers two compressor models suitable for Air Locker operation (high output air compressor or mini air compressor). A dedicated air activation system is available which is extremely durable and compact. Alternatively a larger compressor can be specified, which is also perfect for inflating tires, air mattresses and a host of other applications where compressed air is required.

ARB RD121 Vehicle Fitment – 3.73 and down gear ratio only

Toyota Landcruiser Prado 120 and 150

Toyota 4Runner 4th and 5th Gen (2003-current)

Lexus GX470 and GX460

Toyota Hilux 2005-current

Toyota Tacoma 2005-current

Toyota Fortuner 2005-current

Toyota FJ Cruiser (all years)

Additional information

Weight	30 lbs

Related products

Dobinsons
Dobinsons C59-325 Rear Coils | Toyota 4Runner FJ Cruiser GX470 GX460
- Fully Designed, Manufactured, and Finished In Australia
- Ultra modern design technology, Fully Scragged & Load Tested
- State of the Art Heat Treatment, High Intensity Shot Peened
- Formed on Precision Mandrels, Precise End Configurations
- Durable Powder Coat Finish
- Sold in Pairs
- 420mm free height, 17mm wire diameter, 220LBF/IN Spring Rate
$270.00 Select options
Dobinsons
Dobinsons GS59-574 Pair Extended Travel Struts FJ Cruiser 2010+ 4Runner 2010+ GX460
- Suits Toyota FJ Cruiser 2010+ and Toyota 4Runner 5th Gen 2010-2024, and Lexus GX460 (all years) for 2.0″ to 3.5″ of lift
- Nitrogen Gas Charged, low pressure gas, reducing reducing oil aeration (shock fade)
- Superior Design, thicker walls, longer travel
- Japanese NOK Multi-Lip seals
- Fuchs German shock absorber oil
- Natural Rubber Bushings for reduced noise vibration and flexibility
- Teflon Piston Rings, double Chrome hardened rods, metal shock boot to protect rod from damage
- Matched to compliment Dobinsons Complete Suspension Systems
- Dobinsons GS59-574 Specifications: Extended Travel – 575mm extended, 430mm compressed, 54mm body size
- Dobinsons GS59-574 struts add 1″ to the listed coil spring that are used with them, due to the raised coil seat. They are also longer than stock for taller lifts
- Example: Use a 2″ lift spring with these struts to get 3″ of lift
$350.00 Select options
Accessories
Dobinsons 4Runner Drawers | Toyota 5th Gen 4Runner 2010-2024
- One of the strongest and best looking drawer systems out there for the 5th Gen 4Runners!!
- 1.6mm Zinc Plated Robust Steel Construction
- 12mm Heavy Duty Plywood Panels with Marine Carpet Covering
- Built-in Heavy-Duty Fridge Slide
- 8 x Heavy Duty Stainless Steel Tie Down Points
- Comprehensive outer wing trim kit to provide a factory fit (optional)
- Installation of drawers REQUIRES drilling and bolting through floor.
- Vehicle Specific Instructions – 4Runner 5th Gen
- Any existing sliding deck must be removed prior to drawer installation.
- Aluminum Edging Protection, Heavy duty lockable latches.
- Sliding portion is not changeable from one side to the other.
- Not compatible with 3rd row seat installed.
- Massive 150KG (330LB) Drawer Capacity on Heavy Duty Roller Bearing System
- Normally ships to the nearest freight terminal on a pallet for you to pick up, unless home delivery option is selected. We will be in touch with that delivery address
From $1,465.00 Select options
Dobinsons
Dobinsons C59-701V Rear UHD Long Travel Coils | Toyota 4Runner FJ Cruiser GX470 GX460
- Fully Designed, Manufactured, and Finished In Australia
- Ultra modern design technology, Fully Scragged & Load Tested
- State of the Art Heat Treatment, High Intensity Shot Peened
- Formed on Precision Mandrels, Precise End Configurations
- Durable Powder Coat Finish
- Sold in Pairs
- 500mm free height, 17mm wire diameter, 210-245LBF/IN variable spring Rate
$305.00 Select options