Jeep Wrangler vs. Ford Bronco: Best Off-Roader for Colorado Adventures

Every Jeep on our lot has four-wheel drive. Not one of them has the same four-wheel drive as the one parked next to it, and the differences are not marketing. They decide whether you can leave the system engaged on a wet highway, whether you have a low range for a steep pull, and whether the vehicle will get down a two-track without help.

Here is what each system actually is, which Jeeps use it, and how to tell which one you are looking at on the window sticker.

What is the difference between part-time and full-time four-wheel drive?

This distinction underpins everything else, and it is mechanical.

A part-time system has no center differential. The transfer case locks the front and rear driveshafts together so they must turn at the same speed. When you turn a corner, the front axle travels a longer arc than the rear, so those two axles genuinely need to rotate at different speeds. With no center differential, there is nowhere for that difference to go.

On snow, dirt, or gravel, the tires slip a few degrees and relieve it harmlessly. On dry pavement, they cannot slip, so the torque binds up in the transfer case, the driveshafts, and the U-joints. That is the hop and steering bind you feel when someone leaves 4H engaged on a dry road. It chews tires, and over time it damages the transfer case. That's why part-time 4H is a loose-surface mode.

A full-time system puts either a mechanical center differential or an electronically controlled clutch pack between the axles, which lets the front and rear turn at different speeds. That is what makes it safe to drive on dry pavement, and it is why full-time systems can be left engaged year-round.

Which Jeep 4x4 systems have a true low range?

Most do, but not all, and the exceptions catch people out.

System availability varies by trim and package and changes during a model year. Confirm the system on the specific vehicle you are considering before you buy.

Quadra-Trac I is the one to watch. It is a full-time, single-speed system, so it is always working and fine on any surface, but it has no low range. Traction comes from a brake-lock differential, meaning the brakes pinch a spinning wheel to send torque to the one with grip. It is genuinely capable in snow, and it is the standard system on every 2026 Grand Wagoneer trim. If you want a low range in a Grand Wagoneer, you have to option Quadra-Trac II.

What makes Rock-Trac different from Command-Trac?

Gearing, hardware, and how far it will go before it stops.

Command-Trac gives you a 2.72:1 low range. Rock-Trac gives you 4:1. That is a meaningfully deeper first gear, and it changes what a steep, rocky, low-speed climb feels like from the driver's seat. You are not riding the throttle and hoping.

Rock-Trac also comes with hardware Command-Trac doesn't get. On a Wrangler Rubicon, that means heavy-duty Dana 44 solid axles front and rear, Tru-Lok electronic locking differentials at both ends, and an electronic sway-bar disconnect for wheel travel. Axle ratios run 4.10 standard, with 4.56 and 4.88 available.

Pair the 4.88 axle with the six-speed manual and Jeep publishes a crawl ratio of up to 100:1. That is the number that puts a Rubicon where nothing else in the segment goes.

What does Quadra-Drive II add over Quadra-Trac II?

A rear electronic limited-slip differential, and the difference is worth understanding because it is the gap between reacting and anticipating.

Quadra-Trac I uses the brakes to manage a spinning wheel. Effective, but it works by turning momentum into heat after the slip has already started. Quadra-Drive II adds a computer-controlled clutch-pack differential in the rear axle that mechanically shifts torque across to the wheel that still has grip, and it does it pre-emptively, reading steering angle, yaw, and throttle rather than waiting for a wheel to break loose. Jeep claims it can route up to 100% of available torque to the axle with the most traction.

On a washed-out road in April, that is the difference between a Grand Cherokee that pauses and scrabbles and one that simply keeps going.

What about the Compass Trailhawk's 20:1 crawl ratio?

This is the most commonly misstated fact in Jeep's whole lineup, and getting it right matters if you are cross-shopping.

The Compass Trailhawk's Active Drive Low system produces a 20:1 crawl ratio, and Jeep publishes that figure. But it does not get there with a two-speed transfer case the way a Wrangler does. It reaches 20:1 through shorter axle gearing while holding first gear. The result is real, and a Trailhawk will do things that surprise people. It still doesn't have the same hardware as a Rock-Trac Wrangler with a 4:1 case, and anyone telling you the Compass has a true low range is repeating something they read rather than something Jeep published.

The 2026 Cherokee is worth naming here too. It uses Jeep Active Drive I with a rear-axle disconnect and no low range. Good AWD, genuinely useful in snow, not a rock crawler.

So which one should you buy?

Work backward from the worst road you drive, not the average one.

• You want it handled without thinking. Full-time, every time. Quadra-Trac I on a Grand Cherokee or Grand Wagoneer, or Selec-Trac on a Wrangler if you want low range on top of it. Leave it engaged from October to May and stop worrying about the forecast.
• You drive unmaintained roads and tow. Quadra-Trac II or Quadra-Drive II. You get the low range you need for a steep pull with a trailer, and a system you can leave on all winter.
• You actually go off-road. Rock-Trac. The 4:1 case, the Dana 44s, and the front and rear lockers are not a trim package; they are different hardware, and there is no substitute for them further down the lineup.
• You want the value pick. Command-Trac on a Wrangler Sport or Willys. A true 2.72:1 low range and Jeep's part-time architecture for the least money in the lineup. Just remember it comes out of 4H on dry pavement.

One thing that outranks all of it in Colorado. The state's traction law is written around tires, not drivetrains, and a 4x4 on worn tires is both non-compliant and genuinely worse at stopping than a two-wheel-drive truck on good winter rubber. Whatever system you choose, put it on the right tires. Our service department can tell you in about a minute whether yours will pass.