If you own a Jeep Rubicon, you have a powerful tool for off-road driving: the locking differential, commonly called lockers. These special features help you get through tough terrain, but many owners are unsure how and when to use them. Knowing the right way to use lockers keeps your Jeep safe, prevents damage, and makes off-roading more enjoyable. Let’s explore how to use lockers on a Jeep Rubicon, with clear steps and expert tips for every skill level.
What Are Lockers And Why Use Them?
Lockers are devices inside the axle that lock both wheels together. This means both wheels on the same axle turn at the same speed, even if one is slipping. On rough trails, mud, or rocks, lockers give you more grip and control.
Without lockers, your Jeep’s normal differential lets power go to the wheel with least resistance. This is good for regular roads but can leave you stuck if one wheel is off the ground or on ice. Lockers solve this by forcing both wheels to work together.
Key Benefits
- Better traction on rocks, mud, snow, and sand
- More control in difficult situations
- Safer recovery if you get stuck
Many Rubicon owners don’t realize that lockers aren’t always needed. In fact, using them on easy trails or pavement can cause damage.
Understanding Your Jeep Rubicon’s Lockers
The Jeep Rubicon comes with two electronic locking differentials—one in the front and one in the rear. You control them using switches on the dashboard, often labeled “FRONT+REAR” and “REAR ONLY.”
Here’s a quick look at how the lockers compare to other traction systems in your Jeep:
| Feature | Locker | Limited Slip Differential | Open Differential |
|---|---|---|---|
| Locking Ability | Full lock (both wheels turn together) | Partial (some power transfer) | None (power to wheel with least resistance) |
| Best For | Rock crawling, deep mud | Everyday off-road, mild trails | Normal roads |
| Control | Driver controlled | Automatic | Automatic |
When And Where To Use Lockers
Lockers are not for every situation. The best time to use them is when you need maximum traction:
- Climbing steep, rocky hills
- Crossing deep mud or snow
- Navigating uneven trails where wheels lift off the ground
Do NOT use lockers on dry pavement or in tight turns—this can damage the axles or gears.
Common Mistakes To Avoid
- Engaging lockers too early: Wait until you actually need extra grip.
- Using lockers on pavement: Only use in low-traction situations.
- Leaving lockers on: Turn them off after the obstacle to avoid wear.
Step-by-step: How To Use Lockers On Jeep Rubicon
Using lockers is simple, but timing and technique are important.
1. Shift Into 4-lo (low Range)
Lockers only work in 4-LO. Stop the Jeep, shift the transfer case into 4-LO.
2. Slow Down
Lockers should only be used at low speeds (under 10 mph). Going faster can damage the system.
3. Engage The Rear Locker
Press the “REAR ONLY” switch. A light will blink, then stay solid when locked.
4. Engage The Front Locker (if Needed)
If the rear isn’t enough, press “FRONT+REAR. ” Now both axles are locked. Use front locker only for the toughest obstacles.
5. Drive Carefully Through The Obstacle
Keep the steering straight if possible. Locked axles can make turning harder.
6. Disengage Lockers After The Obstacle
Turn off lockers as soon as you’re past the rough section. The lights on the dashboard should go off.
Here’s a quick reference for when to use each locker:
| Situation | Locker to Use |
|---|---|
| Normal Off-Road | None or Rear Only |
| Steep Climb | Rear, then Front+Rear |
| Deep Mud/Snow | Rear, then Front+Rear |
| Cross-Axle Obstacles (Wheels off ground) | Front+Rear |
Practical Tips For Using Lockers
- Listen for noises: Strange grinding or clunking may mean the locker isn’t fully engaged.
- Practice before you need them: Try lockers in a safe, open area to see how steering and handling change.
- Don’t force steering: Turning with lockers on is harder. Slow down and use gentle turns.
- Wait for the dash light: The locker needs a second to engage. Don’t rush.
Two Insights Most Miss
First, lockers don’t increase engine power—they only help use what grip you have. If you’re still stuck with lockers on, you may need to lower tire pressure or change your line.
Second, lockers help most when one wheel is off the ground. On flat, slippery ground, tire choice and speed matter more than lockers.
Locker Maintenance And Safety
Lockers are tough, but not unbreakable. Check your owner’s manual for service intervals, and avoid these mistakes:
- Don’t spin wheels fast and then suddenly get grip—this shocks the axles.
- Never use lockers for everyday driving.
- If a locker won’t disengage, drive forward and backward slowly to release tension.
If you plan to install larger tires or use your Rubicon for extreme trails, consider upgrading your axles for extra strength. For official guidance, see the Jeep Off-Road Driving Guide.
Frequently Asked Questions
How Fast Can I Drive With Lockers Engaged?
You should keep speeds under 10 mph when using lockers. Going faster puts stress on the drivetrain and may damage the system.
Can I Use Lockers On The Road?
No, lockers are for off-road use only. Using them on pavement can cause tire wear, steering problems, and break expensive parts.
What If The Locker Light Keeps Blinking?
A blinking light means the locker is trying to engage but hasn’t locked yet. Stop, turn the steering wheel left and right, and try again. If the light stays on, there may be a technical issue.
Do I Need To Use Both Lockers At The Same Time?
Not always. Start with the rear locker—this handles most off-road needs. Use the front locker only for the toughest spots, like when wheels are off the ground.
Will Lockers Help On Ice Or Snow?
Lockers can help in deep snow or when one wheel is slipping. But on flat, icy roads, lockers can make handling worse. Use with caution and turn them off when back on pavement.
Using lockers on your Jeep Rubicon adds confidence to your off-road adventures, but only if you know when and how to use them. With practice, you’ll get the most out of your Jeep’s abilities while keeping it reliable for years to come.
