If you own a 1999 Jeep Cherokee, you probably enjoy its rugged performance and off-road ability. But to really get the most from your Cherokee, you need to understand how to use its 4 wheel drive (4WD) system. Many owners, especially those new to Jeeps or 4WD vehicles, may feel unsure about when and how to engage 4WD safely. This guide breaks down the process in clear steps, offers expert tips, and explains what you need to know so you can drive confidently, no matter the terrain.
How The 4 Wheel Drive System Works In A 1999 Jeep Cherokee
The 1999 Jeep Cherokee usually comes with a part-time 4WD system, often known as Command-Trac, and sometimes the Selec-Trac full-time system. Both systems allow you to switch between 2WD and 4WD, but they operate differently.
- Command-Trac: This system is designed for use in low-traction conditions like snow, mud, or sand. You should not use 4WD on dry pavement, as it can damage the drivetrain.
- Selec-Trac: This system adds a full-time 4WD mode, which you can use on any surface, including dry pavement.
Knowing which system your Cherokee has is important. Most 1999 Cherokees have Command-Trac. You can find the system type on the lever or in your owner’s manual.
Getting Ready: Safety And Preparation
Before shifting into 4WD, make sure you’re prepared:
- Check your tires. All four tires should have similar size and tread. Mismatched tires can cause binding and damage.
- Know your system. Confirm if you have Command-Trac or Selec-Trac.
- Read the lever labels. The transfer case lever is usually next to the main gear shift, with positions like 2H, 4H, N, and 4L.
- Drive at low speed. Never shift into 4WD at high speeds. It’s safest to switch below 55 mph for 4H and stopped or crawling for 4L.
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Step-by-step: How To Put A 1999 Jeep Cherokee In 4 Wheel Drive
Switching to 4WD in your 1999 Cherokee involves using the transfer case lever. Here’s how to do it safely:
Engaging 4 High (4h)
- Keep moving straight at a speed below 55 mph.
- Take your foot off the gas briefly.
- Firmly pull the transfer case lever from 2H to 4H.
- You may hear a soft click as it engages.
- Return your foot to the gas and continue driving.
4H is for slippery surfaces—snow, sand, gravel, or mud.
Engaging 4 Low (4l)
- Stop the vehicle completely.
- Shift the main transmission to Neutral (N).
- Pull the transfer case lever from 4H to 4L in one smooth motion.
- Wait for the system to engage—you may feel a clunk.
- Shift the main transmission back to Drive or 1st gear (if manual).
- Proceed slowly—4L is for deep mud, steep hills, or rock crawling.
Never shift directly from 2H to 4L. Always go through 4H.
Disengaging 4 Wheel Drive
- For 4H to 2H: Simply move the lever back to 2H while driving straight at low speed.
- For 4L to 4H: Stop, shift the transmission to Neutral, then move the lever to 4H.
When Should You Use 4 Wheel Drive?
Knowing when to use 4WD protects your Cherokee and keeps you safe.
- Use 2H (2 wheel drive) on dry roads for best fuel economy.
- Use 4H (4 High) on snow, ice, mud, or loose gravel.
- Use 4L (4 Low) for tough off-road, deep sand, climbing steep hills, or getting unstuck.
A common mistake: using 4H or 4L on dry pavement. This puts extra stress on your drivetrain and may cause binding or damage.
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Real-world Example: Switching To 4wd In Snow
Imagine you’re driving on a snowy road. You notice your Cherokee starts to slip.
- Slow down to under 55 mph.
- Pull the transfer case lever to 4H.
- You feel more grip as all four wheels engage.
- If you reach a steep hill or get stuck, stop, shift to Neutral, and move the lever to 4L.
Experienced Jeep owners recommend practicing the shift in a safe, open area before you need it in an emergency.
Table: 4wd Lever Positions And Their Uses
Here’s a simple guide to what each lever position means:
| Position | When to Use | Max Speed |
|---|---|---|
| 2H | Dry, normal roads | Any |
| 4H | Snow, mud, sand | Below 55 mph |
| N | Towing/neutral | 0 mph (not for driving) |
| 4L | Steep hills, deep mud | Below 25 mph |
Common Mistakes And How To Avoid Them
Many new owners make errors with 4WD. Here are mistakes to avoid:
- Engaging 4WD on dry pavement. This can lead to drivetrain bind, making turning difficult and causing wear.
- Shifting at high speed. Always slow down before shifting to 4H, and stop for 4L.
- Forcing the lever. If it resists, do not force. Roll the vehicle slightly or shift to Neutral.
- Ignoring tire differences. Uneven tire sizes or wear can cause drivetrain problems.
Maintenance Tips For 4wd System
To keep your Cherokee’s 4WD working well:
- Change transfer case fluid every 30,000 miles.
- Inspect axle seals for leaks.
- Check for noises when in 4WD, which might mean parts need repair.
- Test 4WD system a few times a year, even if you don’t use it often.
Regular maintenance prevents expensive repairs and keeps your 4WD reliable.
Table: Symptoms Of 4wd Problems And What They Mean
If your 4WD system is not working right, you might notice:
| Symptom | Possible Cause | Action |
|---|---|---|
| Grinding noise when shifting | Low fluid or worn parts | Check fluid, see mechanic |
| 4WD light stays on | Switch or sensor issue | Diagnostic check |
| Binding during turns | Using 4WD on dry pavement | Switch to 2H |
| Difficulty shifting out of 4WD | Drivetrain tension | Reverse slowly, try again |
What Makes The 1999 Jeep Cherokee’s 4wd Unique?
The 1999 Cherokee is famous for its strong and simple 4WD system. Unlike many modern SUVs, it uses a manual lever rather than a button or dial. This gives you more control and reliability, especially off-road.
Experienced drivers value the Cherokee for its:
- Solid axles for better strength
- Simple mechanics that are easy to repair
- Good aftermarket support for upgrades
However, this also means you must operate the 4WD system correctly. There’s no electronic “safety net” if you use it wrong.
Comparison: Command-trac Vs Selec-trac
Some Cherokees have Selec-Trac instead of Command-Trac. Here’s how they compare:
| Feature | Command-Trac | Selec-Trac |
|---|---|---|
| Part-time 4WD | Yes | Yes |
| Full-time 4WD | No | Yes |
| Safe on dry pavement | No | Yes (in full-time mode) |
| Number of modes | 4 | 5 |
If you drive often in changing weather, Selec-Trac offers more flexibility. But Command-Trac is tough and simple for off-road use.
Two Insights Most Beginners Miss
- Practice in a Safe Place: Many drivers wait until they are stuck or sliding before trying 4WD for the first time. It’s much better to practice in an empty parking lot or dirt road, so you know how the lever feels and what to expect.
- 4WD Does Not Help You Stop Faster: A big misunderstanding is that 4WD helps with braking. It only helps you move and steer better on slippery roads. Always increase following distance and drive slower in bad conditions.
A Few Words About 4wd Light And Indicator
Your Cherokee may have a small 4WD indicator light on the dash. When you shift into 4H or 4L, it should light up. If it doesn’t, but you feel the Jeep engage (a “clunk” and more grip), the system is probably working. Sometimes the light can burn out or the switch may fail. If in doubt, have it checked, but trust the lever’s feel and the vehicle’s response.
What To Do If You Get Stuck
Even with 4WD, it’s possible to get stuck. Here’s what to do:
- Stop spinning your tires. This digs you in deeper.
- Shift to 4L for maximum torque.
- Turn your steering wheel left and right to find traction.
- Use sand or boards under the tires for grip.
- Let some air out of your tires (not too much) to increase contact.
If you’re still stuck, call for help. Carrying a tow strap and shovel is wise if you go off-road often.
Resources For More Information
If you want more detailed technical information, the Jeep Cherokee owner’s manual and forums like NAXJA are excellent. For a broad overview of 4WD systems, see this Wikipedia article.
Can I Shift My 1999 Jeep Cherokee Into 4wd While Driving?
Yes, you can shift from 2H to 4H while driving straight at speeds below 55 mph. Always slow down and avoid sharp turns during the shift. For 4L, you must be stopped and in Neutral.
How Do I Know If My 4wd Is Working?
You should feel a difference in traction, especially on slippery surfaces. The 4WD indicator light should also come on, but if it doesn’t, pay attention to the way the Jeep drives and listen for a “clunk” when engaging.
Can I Use 4wd On Dry Pavement?
No, you should not use part-time 4WD (Command-Trac) on dry roads. This causes drivetrain binding and possible damage. If you have Selec-Trac, the full-time mode is safe for any surface.
What Happens If I Force The Lever And It Won’t Move?
Never force the transfer case lever. Make sure your Cherokee is moving straight, at low speed, and try again. If shifting to 4L, ensure you are stopped and in Neutral. Forcing the lever can damage the system.
How Often Should I Use My 4wd System?
It’s smart to engage your 4WD system a few times each year, even if you don’t need it. This keeps the parts lubricated and working properly, preventing problems from lack of use.
Whether you’re tackling snowy roads or exploring backcountry trails, knowing how to use your 1999 Jeep Cherokee’s 4 wheel drive is essential. Practice the steps, follow the tips, and your Cherokee will be ready for any adventure.
