Understanding Jeep’s 4×4 Systems: Which Is Right for You?

Jeep 4×4 systems are diverse by design, giving drivers options that match how and where they like to explore. Here’s a look at the ones available across the lineup.

Understanding Jeep 4×4 Systems: Which Is Right For You?

Command-Trac 4×4 System

Command-Trac is a four-wheel drive system designed for use when needed. It offers four modes to handle nearly any driving condition. The first mode, 2H, is for everyday driving, where only the rear wheels are engaged. In 4H, all four wheels turn at the same speed, making it ideal for slippery or loose surfaces.

Selec-Trac 4×4 System

This system adds a clutch pack in the center that lets the front and rear axles turn at different speeds. In 4H Part-Time mode, the Selec-Trac system functions similarly to the Command-Trac system, i.e., it locks both the rear and front axles. However, in 4H Full-Time mode, you can keep it engaged at all times because it allows all four wheels to move at different speeds. Put simply, it works like an all-wheel drive system when in Full-Time mode.

Quadra-Trac I 4×4 System

The Quadra-Trac I is essentially an all-wheel drive system.

Quadra-Trac II 4×4 System

The Quadra-Trac II expands on the Quadra-Trac I system with a two-speed transfer case that offers both full-time four-wheel drive and low-range capability. In normal mode, it splits power 48/52 front to rear, but can instantly send all engine power to the axle with better traction.

In the low range, it uses a 2.72:1 reduction that evenly distributes power between the rear and front axles via a mechanical linkage. This system also features Hill Descent Control, which automatically applies the brakes for a smooth, controlled descent on steep terrain.

Quadra-Drive II 4×4 System

The Quadra-Drive II uses the same transfer case as the Quadra-Trac II system but adds front and rear electronic limited-slip differentials. This configuration enables it to send 100% of the power to the wheel with the most traction at any given moment.

Rock-Trac 4×4 System

This is Jeep’s most hardcore 4×4 system. It shines in low range, using a heavy-duty transfer case with a 4:1 gear ratio and a 73:1 crawl ratio that allows it to climb as slowly as 0.5 mph over rocks. It also includes a disconnecting front sway bar for maximum wheel articulation.

To see how these systems perform in the real world, schedule a test drive at Devils Lake Chrysler Dodge Jeep Ram in Devils Lake, ND.

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