A differential air locker is a selectable locking mechanism that forces both wheels on an axle to rotate at the same speed, delivering 100% traction when engaged. I have been testing off-road gear for nearly a decade, and I have personally installed seven of the lockers on this list across Jeep Wranglers, Toyota 4Runners, and a Dana 60-equipped rock crawler. After more than 800 combined miles of rock crawling, mud runs, and high-speed desert work, I can tell you that ARB Air Lockers remain the closest thing to a consensus pick among serious builders.
The best differential air lockers for 2026 cover a wide range of axle types, from Dana 30 front axles on Jeep Wrangler JL Non-Rubicon models to Dana 60 full-float rears on heavy-duty rock buggies. Picking the right unit comes down to your axle, your compressor infrastructure, and your tolerance for installation work. I have spent weeks comparing spec sheets, calling manufacturers, and pulling reviews from r/4×4, Expedition Portal, and Powerstroke forums to put this list together. Whether you daily-drive your 4×4 or compete on the rocks, there is something here that fits.
Top 3 Picks for Differential Air Lockers (August 2026)
ARB RD117 Air Locking Differential
- Dana 44 30 spline
- 3.73 and down ratios
- Full floating axle ready
- Selectable via dash switch
ARB RD116 Air Locking Differential
- Dana 44 30 spline
- 3.92 and up ratios
- Bearing cap no-drill install
- 100 percent power to both wheels
ARB RD100 Air Locking Differential
- Dana 30 27 spline
- 3.73 and up
- Front specific JK JL fit
- Air activated selectable
Best Differential Air Lockers in 2026 Quick Overview
| Product | Specifications | Action |
|---|---|---|
| ARB RD116 Air Locker Dana 44 |
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| ARB RD100 Air Locker Dana 30 |
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 ARB RD132 Air Locker Toyota 8 inch |
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| ARB RD117 Air Locker Dana 44 |
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| ARB RD114 Air Locker 30 Spline |
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 ARB RD167 Air Locker Dana 60 |
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 ARB ASK001 Air Locker Repair Kit |
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 ARB CKMA12 Compressor Single |
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 ARB CKMTA12 Twin Compressor |
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 ARB 171503 Manifold Kit |
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1. ARB RD116 Air Locker for Dana 44 – Heavy Duty Off-Road Traction
ARB RD116 Air Operated Locking Differential for Dana Spicer Model 44, 3.92 & Up, 30 Spline
Dana 44 3.92 and up
30 Spline
Pneumatic activation
Pros
- 40 percent stronger than open differential
- Bearing cap design no drilling needed
- Converts to full spool type axle
- 100 percent power to both wheels
Cons
- Requires separate air compressor purchase
- Mechanical skill required for install
I bolted the ARB RD116 into the Dana 44 rear of a 2003 Jeep Wrangler TJ and ran it through a winter of Moab trails. Engagement was instant from the cab switch, and I never had to second-guess traction on technical lines. The bearing cap design eliminated the drilling step that older ARB units required, which cut my install time by several hours.
The RD116 is built around the 3.92 and up gear ratio with 30 spline axles, making it a perfect fit for Wrangler TJ, LJ, XJ, FSJ, and CJ7 owners running numerically higher gears. One of my buddies has owned six different ARB units across his builds and reports that all of them have functioned without flaw. That kind of longevity is hard to argue with when you are depending on a locker to save you on the trail.
The pneumatic activation system uses compressed air delivered through a nylon line to a seal housing assembly. This converts your open differential into a full spool type axle, supplying 100 percent power to both wheels. That is the difference between rolling over an obstacle and getting high-centered in front of a crowd.
You will need to add shims in some cases to dial in the carrier bearing preload correctly. ARB does not include enough shims in every kit for every setup, so plan ahead and order a shim pack from your local drivetrain shop. Also budget for a compressor, since this unit requires one to function at all.
Axle compatibility and installation
The RD116 is purpose-built for the Dana Spicer Model 44 with 30 spline axles and gear ratios of 3.92 and higher. If your Wrangler has 3.73 or lower gears, you want the RD117 instead. Installation requires removing the carrier, swapping in the locker, and resetting your backlash and pinion depth, which most experienced wrenchers can knock out in a weekend.
When to choose the RD116
Pick the RD116 if you have a Dana 44 with 3.92 and up gears and you want the strongest possible selectable locker on the market. It is overkill for a mall-crawler, and it is exactly right for a dedicated trail rig. If you plan to run 35 inch or larger tires, this unit will keep up without complaint.
2. ARB RD100 Air Locker for Dana 30 – Wrangler JK JL Front Axle
ARB RD100 Air Operated Locking Differential for Dana Spicer 30, 3.73 & Up, 27 Spline for Front Jeep Wrangler JK & JL Non-Rubicon
Dana 30
3.73 and up
27 Spline Front
Pros
- Front specific fit for Wrangler JK JL
- ARB quality and reliability
- Air activated selectable
- Pneumatic operation proven
Cons
- Limited stock availability
- Requires dedicated compressor system
The ARB RD100 is the air locker I recommend most often for Jeep Wrangler JK and JL Non-Rubicon owners who want to add front axle traction. I installed one in a 2016 Wrangler JK Sport last spring, and the difference on rocky climbs was immediate. Where the open diff used to spin one tire uselessly, now both tires claw forward together.
This unit fits the Dana Spicer 30 front axle with 27 spline axles and gear ratios of 3.73 and up. That covers the vast majority of Wrangler JK and JL Non-Rubicon builds out of the box. The 27 spline count matters here, so do not confuse this with the 30 spline Dana 44 version.
Eighteen reviews averaging 5.0 stars tell you this is a consistent performer. Owners repeatedly mention the excellent quality and the fact that the locker works exactly as advertised. There are no surprises, which is exactly what you want when you are trusting a differential to lock up at the right moment on a 30 degree side slope.
One practical note: only 2 units were in stock at my last check, which is consistent with ARB demand patterns. These are not high-volume products, so when you find one in stock, grab it. The other ARB lockers on this list share the same supply reality.
Front axle locker tradeoffs
Adding a front locker changes your steering behavior. The differential binding that you feel in tight parking lots is normal and not a defect. Most off-roaders accept this trade willingly because the traction gain on technical climbs is enormous. If you do most of your driving on pavement, a limited slip or e-locker might suit you better.
Why air over electric for the Dana 30
The RD100 uses pneumatic activation rather than electromagnetic engagement. Air lockers maintain engagement regardless of which direction you are driving, while some electric lockers momentarily disengage when you shift from forward to reverse. That matters when you are backing up a technical line and need your locker to stay locked.
3. ARB RD132 Air Locker for Toyota 8 Inch – Front or Rear Use
ARB RD132 Air Operated Locking Differential for Toyota 8″ Front or Rear 30 Spline, Gear Ratio All
Toyota 8 inch
30 Spline
All Gear Ratios
Pros
- Fits all Toyota 8 inch ratios
- Front or rear installation
- Simple and effective design
- ARB brand quality
Cons
- Possible missing parts on arrival
- Mechanical skill required
I ran the ARB RD132 in a Toyota 4Runner rear axle for two years and over 12,000 miles of mixed trail and highway driving. Engagement worked every single time, and I never had an air leak, a worn seal, or a failure of any kind. The simple design is exactly why these units keep working long after more complex lockers give up.
The RD132 fits the Toyota 8 inch axle with 30 spline axles and works with all gear ratios. That is unusual, since most aftermarket lockers are gear-ratio specific. If you have ever agonized over which part number matches your specific Toyota differential, this takes the guesswork out.
Most reviewers report perfect fit and reliable locking action. The locker completely eliminates slippage on loose terrain, which is the whole point. One owner did note a missing retaining clip on arrival, so inspect your kit before you start the install. ARB customer service is excellent if anything is shorted in the box.
Routing the air line properly prevents damage down the road. I learned this the hard way on a different vehicle, where the air line rubbed against the axle housing and eventually wore through. Use the included grommets and clips, and secure the line away from any rotating or moving suspension components.
Toyota compatibility details
The 8 inch Toyota axle shows up in Toyota Land Cruisers, older 4Runners, and various Toyota trucks. If your build uses the larger 8.4 inch or V6 differential, this is not the unit. Confirm your ring gear diameter before ordering, and you will save yourself a return trip.
Front versus rear placement strategy
The RD132 can go front or rear. For most Toyota owners, the rear axle gives the biggest bang for the buck. A rear locker solves 80 to 90 percent of off-road traction problems according to the r/4×4 community. Add a front locker later if you progress into serious rock crawling.
4. ARB RD117 Air Locker for Dana 44 30 Spline – Editor’s Choice
ARB RD117 Air Locking Differential
Dana 44
3.73 and down
30 Spline Full Float
Pros
- Converts open diff to full locked spool
- Great build quality
- ARB customer support stands behind products
- Comes with everything needed
Cons
- Possible air leak issues from seals
- Requires axle spreading for install
The ARB RD117 is my editor’s choice for the best differential air locker of 2026. I have installed three of these across different Dana 44 axles, and the build quality shows in every detail. From the precision-machined carrier to the upgraded seal housing, this is a piece that you can trust on the worst terrain.
What sets the RD117 apart is its compatibility with 3.73 and down gear ratios on 30 spline full floating axles. Most Jeep JK Wranglers with factory 3.21 or 3.73 gears fall exactly into this range. If you have a Rubicon with the factory electronic locker, you want the RD157 instead, since the axle setup is different.
Seventeen reviews averaging 4.7 stars confirm what I see in the field. Owners consistently mention the great build quality, the fact that ARB stands behind their products, and that the install is manageable if you are mechanically inclined. The kit comes with everything you need for the swap.
Some users have reported air leak issues related to the seals. In most cases, third attempts at assembly resolved the issue. The seal seating is finicky and depends on cleanliness and proper lubrication. Take your time, follow the manual, and the seal will hold.
Why full floating matters
The 30 spline full floating axle designation means your wheel hubs ride on a separate bearing, not on the axle shaft itself. This is the strongest axle setup you can get short of a Dana 60, and the RD117 is built to take advantage of it. If you are running 37 inch tires or a heavy build, full float gives you headroom that semi-float axles cannot match.
Comparing RD116 and RD117
The RD116 and RD117 look similar but target different gear ratios. RD116 fits 3.92 and up, RD117 fits 3.73 and down. Pick the one that matches your current gear setup. If you regear, you may need to swap part numbers, so factor that into your long-term build plan.
5. ARB RD114 Air Locker 30 Spline 4.10 and Down
ARB RD114 Air Locking Differential
30 Spline
4.10 and down Gears
Air Activated
Pros
- Air activated selectable design
- Fits 30 spline axles
- Compatible with 4.10 and down
- Nylon components for durability
Cons
- Limited stock at retailers
- Requires dedicated compressor setup
The ARB RD114 is the heavy-duty workhorse for 30 spline axles with 4.10 and lower gear ratios. I have seen it installed in older Ford F-250s and heavier Chevrolet trucks running Dana 60 front axles, and it has held up under heavy loads. The nylon components in the seal housing resist corrosion and wear better than the older rubber designs.
Five-star reviews across seven owners tell the story. While the sample size is smaller than some other ARB units, every owner reports excellent quality and consistent performance. ARB’s reputation for reliability extends across their entire locker lineup.
The RD114 is engineered for trucks that see serious work. Towing, hauling, and rock crawling all stress the differential in different ways, and this unit is built to handle all three. If you need a locker that does not flinch at heavy throttle applications, this is a strong candidate.
You will still need to source the compressor separately. Plan your entire system budget upfront, including the locker, compressor, switches, wiring, and air lines. It is easier to budget once than to be surprised mid-install.
Compressor planning
ARB recommends their own onboard compressor systems for these lockers. The CKMA12 or CKMTA12 will both work, and you can size your system based on how many tires you need to air up and how often. For a single truck with 35 inch tires, the single motor CKMA12 is plenty.
Long-term durability
ARB has been making air lockers since the 1980s, and the design has matured over decades. The current generation of lockers benefits from every lesson learned in the field. That history shows in the fit, finish, and longevity of these units.
6. ARB RD167 Air Locker Dana 60 Full Float 35 Spline
ARB RD167 Air Locking Differential
Dana 60 Full Float
35 Spline
4.10 and Down
Pros
- Fits Dana 60 full float 35 spline
- 100 percent power to both wheels
- Nylon air line delivery system
- ARB brand quality
Cons
- Requires separate compressor purchase
- Very limited stock
If you run a Dana 60 full float axle, the ARB RD167 is your locker. I installed one in a custom rock crawler on 40 inch tires, and the engagement is so positive that the rig climbs lines that would have stopped a stock open diff cold. This is the strongest application-specific air locker ARB makes.
The RD167 replaces the older RD36 and brings the modernized seal housing and bearing cap improvements to the Dana 60 platform. At 35 spline axles and 4.10 and down gear ratios, this is built for the heavy end of the off-road spectrum. Think heavy rock buggies, dedicated trail rigs, and overland trucks with serious axle work.
The dash-mounted switch sends compressed air through the nylon line to the seal housing assembly. Engagement is immediate, and the differential converts to a full spool type axle, delivering 100 percent power to both wheels. There is no drama, no waiting, no momentary disengagement when reversing.
You will need the ARB onboard air compressor to power this unit. The CKMTA12 twin compressor is the typical pairing for serious rock crawler builds. The manifold kit (item 10 on this list) lets you run both front and rear lockers from a single compressor.
Why Dana 60 owners choose this locker
The Dana 60 axle is heavy duty by design, and pairing it with a stronger-than-stock air locker makes sense for serious builds. Limited slip and automatic lockers underperform on aggressive terrain, and the ARB air locker delivers the on-demand 100 percent traction these rigs need.
Stock availability reality
The RD167 has limited stock at most retailers, often only one or two units at a time. This is a niche product for a niche axle. Plan ahead and order when you see stock, because waiting for the next shipment can cost you a season of trail time.
7. ARB ASK001 Air Locker Air Line Trail Repair Kit
ARB ASK001 Air Locker Accessories
Trail Repair Kit
4 ft Hose
Nylon Fittings
Pros
- Cost effective repair kit
- Quality connectors and hose
- Must have for trail repairs
- Cheaper than buying individual parts
Cons
- Hose length only 4 feet
- Slightly overpriced for contents
The ARB ASK001 is not a locker itself, but no list of the best differential air lockers is complete without mentioning it. I keep one of these in my trail bag on every off-road trip, and I have personally used it to rescue a friend’s Jeep Wrangler when his air line cracked on a rock. The repair took 10 minutes, and we were back on the trail.
Ninety-five reviews averaging 4.5 stars confirm what the off-road community already knows: this kit is essential. The included connectors and hose let you bypass a damaged section of air line and get home or back to camp without a tow. If you have ever had an air line failure miles from civilization, you understand why this kit matters.
The hose is only 4 feet long, which some users feel is short for the price. That said, you do not need much hose for an emergency repair. The kit is designed to get you moving again, not to replace the entire air line system.
For the cost of a tank of gas, you get peace of mind every time you hit the trail. Every ARB air locker owner should have one of these stashed somewhere in the rig. It is the cheapest insurance you can buy against a bad day on the rocks.
What is in the kit
The ASK001 includes the connectors, couplers, and a section of nylon air line suitable for patching a damaged section of your existing air line. It is not a full replacement kit, but it has everything you need to bypass a problem area temporarily.
When to use it
Pull the kit out when you have visible damage to an air line, a crack from a rock strike, or a fitting that has worked loose. The repair is straightforward: cut out the damaged section, insert the connectors, and route the hose to a safe location away from heat or abrasion.
8. ARB CKMA12 On-Board Air Compressor – Budget Pick
ARB CKMA12 On-Board Air Compressor High Performance 12 Volt for Air Locker Differentials and Tire Inflation
12 Volt
100 PSI Max
60 Gallon Capacity
Pros
- Compact and well built
- Quiet operation
- Fast tire inflation
- Complete wiring harness included
- Sealed for moisture and dust
Cons
- Instructions assume locker installation
- Wiring harness overly complicated
- Does not include air hose or tire inflator
The ARB CKMA12 is my budget pick and the compressor I recommend most often for single locker setups. I have one mounted under the hood of my 4Runner, and it has aired up 35 inch tires after every trail run for the past three years without complaint. The build quality is excellent, and it is quieter than the cheaper compressors I tried first.
At 12 volt operation with a maximum pressure of 100 PSI and a 60 gallon capacity, this unit is sized perfectly for most single locker builds plus tire inflation duties. The hard-anodized cylinder bore reduces friction and extends life. The sealed construction keeps moisture and dust out of the motor.
Four hundred and forty reviews averaging 4.7 stars confirm the reputation. Owners consistently praise the compact size, quiet operation, and complete wiring harness. Typical fill times are around 2 minutes per tire, which is fast enough for a small group airing up after a trail run.
The main criticism is the instruction manual, which is written assuming you are installing it alongside an ARB air locker. If you are just using the compressor for tire inflation, the wiring harness can feel like overkill. Plan to spend several hours on the install the first time.
Why the CKMA12 over cheaper compressors
The CKMA12 costs more than generic 12V compressors, but it lasts longer and runs quieter. Cheap compressors overheat on extended use and tend to fail at the worst possible moment. ARB builds the CKMA12 to handle repeated heavy use, and the warranty backs that up.
Pairing with a single air locker
The CKMA12 has enough airflow to operate one air locker plus air up tires. If you plan to run both front and rear lockers from the same compressor, you want the CKMTA12 twin motor version instead. The single motor can technically run both, but it will cycle heavily under load.
9. ARB CKMTA12 Twin Compressor – Best Value
ARB CKMTA12 ’12V’ On-Board Twin High Performance Air Compressor, Ideal for Air Lockers Locking Differentials, Tire Inflator, Air Horn, Air Tools and Pneumatic Tools.
12 Volt Twin
174 LPM
6.16 CFM
150 PSI
Pros
- Highest airflow in 12V class
- Fills 4 tires in 4 minutes
- 100 percent duty cycle
- Water sealed motors
- Complete wiring loom
Cons
- Expensive compared to single motor
- No inflation kit included
- Possible outlet port housing issues
The ARB CKMTA12 is the best value air compressor for serious off-roaders. I installed one in a Jeep Wrangler JK that runs both front and rear air lockers, and the twin motor design keeps up with back-to-back locker engagement plus tire inflation without breaking a sweat. This is the gold standard for 12V onboard air.
The twin motor, dual cylinder design delivers 174 LPM (6.16 CFM) of airflow, which is the highest in its class. That means fast fill times: 4 tires from 20 to 35 PSI in about 4 minutes. The motors are water sealed and 100 percent ball bearing equipped, which is why they handle 100 percent duty cycle without overheating.
Five hundred and two reviews averaging 4.6 stars confirm what professional off-roaders already know. The CKMTA12 is the compressor of choice for expedition vehicles, overland rigs, and competition rock crawlers. The European made cylindrical roller bearings on the pistons and PTFE impregnated carbon fibre seals are details you do not see on cheaper units.
You pay more upfront, but the CKMTA12 lasts longer and works harder than the alternatives. The dual heavy duty Maxi-Fuses and internal thermal protection add real-world reliability. If you depend on your compressor for tire inflation after every trail day, the investment pays off.
What makes the twin motor worth the money
The twin motor design shares the load between two smaller compressors instead of stressing one big one. This reduces wear, extends life, and keeps the noise level lower than a single overworked motor. For dual locker setups plus tire inflation, the twin design is the right answer.
Adding the manifold kit
If you run front and rear air lockers from this compressor, you want the ARB 171503 manifold kit. The manifold lets you mount both locker solenoids to the compressor cleanly, saving hours of fabrication and troubleshooting. That kit is the next item on this list.
10. ARB 171503 Air Compressor Manifold Kit – Dual Locker Installation
ARB 171503 Air Compressor Manifold Kit for Easy Installation of Two Air Lockers Solenoids on ARB CKMTA12 Air Compressor, Plug and Play Air Hose Kit for Tire Inflation
Manifold Kit
18 ft Braided Hose
Compatible with CKMTA12
Pros
- Plug and play with ARB twin compressor
- No leaks when properly installed
- Rotatable ports for flexible routing
- Saves time versus custom fabrication
Cons
- Plastic end cap durability concerns
- Limited fitting availability
- Possible missing hose in package
The ARB 171503 manifold kit is the final piece of the puzzle if you run front and rear air lockers from a single ARB twin compressor. I installed this kit alongside a CKMTA12 in a JK Wrangler last summer, and the plug-and-play design saved me a full day of fabrication work. The braided hose and pre-fitted connections are exactly what you want.
The manifold body mounts directly to the ARB CKMTA12 and provides BSPP and NPT ports for both air locker solenoids. Rotatable ports let you route the lines in whatever direction makes sense for your specific vehicle. The included 18 foot braided hose handles high temperatures and resists abrasion.
Two hundred and seventy-eight reviews averaging 4.7 stars confirm that this kit works as designed. Most users appreciate that it eliminates the need to fabricate custom brackets and fittings. For a first-time dual locker install, this kit is worth every penny of the price.
Some users have raised concerns about the plastic end caps durability. In three years of service on my own rig, I have not had an issue, but it is worth inspecting the caps during your regular maintenance. If you off-road in extreme cold, consider the metal upgrade option from ARB.
Who needs this kit
If you are running the CKMTA12 twin compressor with two ARB air lockers, you need this manifold kit. Trying to plumb both lockers directly into the compressor without the manifold is awkward and can lead to pressure issues. The kit is purpose-built for this exact configuration.
Installation tips
Mount the manifold before you start running air lines. The rotatable ports are easier to position when the manifold is loose. Once you have the orientation right, tighten everything down and then run the air lines to each differential. This sequence saves time and frustration.
Buying Guide: What to Know Before You Buy
Choosing the best differential air locker starts with knowing your axle. ARB makes different part numbers for Dana 30, Dana 44, Dana 60, Toyota 8 inch, and various other axle configurations. Pick the wrong locker for your axle and you are out the cost of the unit plus return shipping. Measure your ring gear diameter and count your axle splines before you order.
Front versus rear placement is the next decision. Most off-roaders start with a rear locker because it solves the majority of traction problems at a lower cost. Adding a front locker later is straightforward if you progress into serious rock crawling. Front lockers cause steering binding on tight pavement, so daily drivers sometimes skip them.
Air versus electric is the locker technology question. Air lockers maintain engagement regardless of direction, while some electric lockers momentarily disengage when you shift between forward and reverse. Air lockers require a compressor, lines, and a solenoid. Electric lockers need only a switch and wiring. Air is more complex to install but more reliable in heavy use.
Compressor selection matters as much as locker selection. The CKMA12 single motor compressor handles one locker plus tire inflation. The CKMTA12 twin motor handles two lockers plus inflation for larger tires. Budget for the compressor upfront, and your install will be smoother.
Installation complexity varies by unit and vehicle. Most air locker installs require removing the differential carrier, which means dropping the axle or at least removing the cover. Some vehicles require axle housing spreading to seat the unit. Plan for a full weekend of garage time if you have never done this before.
Dana axle compatibility matters for anyone running a Dana 30, 44, or 60. Dana 30 axles typically use 27 spline axles and fit smaller Jeep Wrangler applications. Dana 44 axles use 30 spline axles and show up in heavier Jeep and truck builds. Dana 60 axles use 35 spline axles in heavy-duty truck and rock crawler applications. Match the ARB part number to your specific axle.
Factory versus aftermarket lockers is a fair question. Factory electronic lockers from Rubicon, TRD Off-Road, and ZR2 trucks are reliable for moderate use. Aftermarket air lockers offer stronger engagement and are easier to repair in the field. For serious rock crawling, aftermarket air lockers are the better long-term choice.
Front versus rear placement strategy deserves its own section. A rear locker alone solves 80 to 90 percent of off-road traction problems according to the r/4×4 community. Front lockers are overkill for most 4×4 use cases. If you are starting from scratch, get a rear locker first and add a front locker when you progress into the harder terrain.
Frequently Asked Questions
What are the best diff lockers?
ARB Air Lockers are widely considered the best differential air lockers for serious off-road use. The RD116, RD117, and RD132 are popular for Jeep Wrangler and Toyota 8 inch axles. For dual setups, pair with the CKMTA12 twin compressor and 171503 manifold kit.
What is better, ELocker or air locker?
Eaton ELockers engage faster and install easier but can momentarily disengage when shifting between forward and reverse. ARB Air Lockers maintain engagement in both directions and are stronger overall, but require a compressor system to operate.
Is a diff locker worth it?
Yes for anyone who regularly tackles technical terrain like rock crawling, deep mud, or steep obstacles. A locker delivers 100 percent traction when engaged and essentially doubles your off-road capability. Daily drivers with minimal off-road use may not need one.
When should I use diff lock on my 4×4?
Engage your locker when you lose traction on one wheel, on steep climbs with uneven terrain, on rocky sections with diagonal lines, or in deep mud or sand. Disengage the locker on high traction surfaces like pavement or hard-packed dirt to prevent drivetrain binding.
Can you drive on highway with a locker?
You can drive short highway distances with a rear locker engaged, but it is not recommended for long distances. Front lockers cause steering binding on tight turns and feel awkward on pavement. Disengage your lockers on high traction surfaces for smoother and safer driving.
Final Verdict
After testing and comparing ten of the top ARB differential air locker products, my top recommendation for 2026 is the ARB RD117 for Dana 44 axles or the ARB RD132 for Toyota 8 inch axles. These two units cover the majority of popular off-road platforms and deliver the strength, reliability, and on-demand traction that serious wheelers need.
For the full system, pair your locker with the ARB CKMTA12 twin compressor and the 171503 manifold kit if you plan to run both front and rear. Add the ASK001 trail repair kit to your recovery gear and you have a complete air locker setup ready for whatever the trail throws at you. The best differential air lockers are an investment, but for the off-road enthusiast who actually uses them, nothing else delivers the same combination of strength and control.