How to Put Your Jeep in 4-Wheel Drive

A 4-Wheel Drive (4WD) helps the vehicle gain traction on slick or loose surfaces, such as snow, mud, or sand. So how do you put your Jeep into 4WD? Find out all about it by reading our article below.  

How Does Jeep 4-Wheel Drive Work?

At its core, Jeep's 4-wheel drive system splits engine power between the front and rear axles to make sure all four wheels work together to grip the terrain. How this power distribution works, however, depends on the specific Jeep model and whether it offers part-time or full-time 4WD. 

Part-Time vs. Full-Time Jeep 4WD

Part-time 4WD is primarily intended for loose, slippery or low-traction surfaces. When engaged, the transfer case mechanically connects the front and rear drive systems, helping to improve traction. Part-time 4WD is not generally intended for prolonged operation on dry road surfaces, as the system may limit the change in rotational speed between the front and rear differentials. This can lead to driveline wind-up, tire scuffing, and increased drivetrain stress.

A full-time four-wheel drive is a system that safely maintains four-wheel drive at all times. The system can switch power between front and rear axles in real time according to driving conditions. Full-time four-wheel drive gives you the most traction in all conditions without having to manually change a lever. 

What Do 2H, 4H and 4L Mean on a Jeep?

2H – Two-Wheel Drive High

2H (two-wheel drive high) is the normal mode for everyday use. The engine's power is delivered to the rear wheels only. This reduces mechanical friction and wear on the front axles. 2H is built for normal highway speeds and is suitable for daily commutes and driving on clean, dry pavement. 

4H – Four-Wheel Drive High

A four-wheel drive high splits the engine’s power evenly between the front and back axles. That makes it ideal for situations that require extra grip, like snowy highways, sand trails, and muddy roads. 

4L – Four-Wheel Drive Low

A 4L is designed for extreme off-road conditions, such as scaling steep inclines and navigating deep mud pits. Four-wheel drive low multiplies the engine’s torque while limiting speed, giving maximum control and preventing transmission overheating.

How to Put a Jeep in 4-Wheel Drive 

For Jeeps equipped with a traditional part-time transfer case, you want to start in 2H first. 

When shifting the transmission, always maintain a steady speed with no aggressive acceleration during the shift. Move the transfer case from 2H to 4H according to Jeep’s instructions. When shifted, confirm the 4WD indicator appears on the instrument panel. 

Please remember that many Jeep systems allow shifting between 2H and 4H while the car is moving within the manufacturer’s limits. Therefore, always check the owner’s manual for your specific Jeep model for exact and accurate information.

When Should You Use 4H in a Jeep? 

Examples

A 4H mode should be used when you’re driving in road conditions that are slippery or icy, such as snow, and on uneven or loose roads like mud, loose gravel, sand, and unpaved surfaces. It’s also worth noting that a part-time 4H shouldn't be used continuously on dry pavement with good traction to prevent mechanical damage. 

When Should You Use 4L in a Jeep? 

Only use 4L when the going gets tough. The 4L setting is good for tough off-road conditions, climbing or descending steep grades, driving through deep mud or sand, crawling over rocks and other obstacles, and for situations where you need more low-speed control.

Are All Jeep Wranglers 4x4? 

Yes, Jeep Wranglers come standard with a 4x4 system. But the model and trim determine what sort of 4x4. Some are part-time 4x4, which allows for switching between 2H, 4H, and 4L, while others have full-time 4x4.

Do you need more information about Jeep vehicles? Or are you ready to look for one? Find your next Jeep at C. Harper CDJR.