Fall driving asks a lot of a vehicle. Wet leaves turn pavement slick, gravel roads soften after a week of rain, trail ruts fill with mud, and the first snowfall can show up before the last long weekend is over. Traction stops being a background detail and starts being the thing you notice every time you pull out of a driveway.
Jeep builds several different 4x4 systems, and they behave in genuinely different ways. Some run full-time and manage torque without any driver input. Others sit in a two-wheel drive until you flip a switch. A few add a low range with enough gear reduction to crawl over rock at walking speed. Here is what each system does, and which kind of fall driving it suits.
|
System |
Type and Low Range |
Where You’ll Find It |
|
Command-Trac |
Part-time, 2.72:1 low range |
Wrangler Sport, Sport S, Sahara; Gladiator Sport S, Willys, Sahara, Nighthawk, Willys ’41 |
|
Selec-Trac |
Full-time, 2.72:1 low range |
Wrangler Moab 392 |
|
Rock-Trac (part-time) |
Part-time, 4.0:1 low range |
Wrangler Rubicon |
|
Rock-Trac (full-time) |
Full-time with 4H AUTO, 4.0:1 low range |
Gladiator Rubicon; optional on Wrangler Rubicon |
|
Quadra-Trac I |
Full-time, single-speed, no low range |
Grand Cherokee, Grand Wagoneer |
|
Quadra-Trac II |
Full-time, two-speed, 2.72:1 low range (Grand Cherokee) |
Grand Cherokee Summit; available on Grand Wagoneer |
|
Jeep Active Drive I |
Automatic, single-speed, no low range |
Cherokee |
|
Jeep Active Drive Low |
Automatic, 20:1 crawl ratio |
Compass Trailhawk |
Part-time systems lock the front and rear driveshafts together. That gives you maximum mechanical grip on loose or slippery ground, with one rule attached: use it only on wet, loose, or slippery surfaces. On dry pavement, the driveline binds, which produces the shudder off-roaders call crow hop.
Command-Trac is the everyday part-time system on the Wrangler and Gladiator. It runs in two-wheel drive for normal commuting, then shifts into 4WD HI at speeds up to 72 km/h (45 mph) when the road turns greasy. It's 2.72:1 low range handles boat ramps, muddy campsite access roads, and steep gravel pitches.
Rock-Trac is the Rubicon system, and its 4:1 low-gear ratio is why it exists. That deep first step multiplies torque at the wheels, allowing the vehicle to creep over obstacles at 2 to 8 km/h (1 to 5 mph) without riding the throttle.
Full-time systems solve the dry-pavement problem with a centre differential, which lets the front and rear driveshafts turn at different speeds. You can leave four-wheel drive engaged across a mixed fall commute of bare asphalt, slush, and wet gravel without thinking about it.
Selec-Trac is the full-time transfer case on the Wrangler Moab 392, paired with the 6.4-litre V-8 rated at 470 horsepower and 470 lb-ft of torque. Full-time Rock-Trac is standard on the Gladiator Rubicon and available on the Wrangler Rubicon, adding a 4H AUTO mode that engages traction as needed while keeping the 4:1 low range for trail work. The Gladiator backs that up with a maximum towing capacity of 7,700 lbs (3,492 kg) and 29.4 cm (11.6 in.) of ground clearance.
Grand Cherokee and Grand Wagoneer use the Quadra-Trac family. Quadra-Trac I is the standard setup: a full-time, single-speed active transfer case with brake traction control that anticipates slip and routes torque before the driver feels anything go loose. There is no low range, which suits drivers whose fall plans run to cottage roads and ski-hill parking lots rather than rock ledges.
Quadra-Trac II adds a two-speed transfer case with a 2.72:1 low range and Selec-Terrain traction management. The 2026 Grand Cherokee arrives on the Summit trim alongside air suspension. On the Grand Wagoneer, it is an available upgrade over the standard single-speed unit.
The Cherokee runs Jeep Active Drive I as standard, with a fully disconnecting rear axle that drops to front-wheel drive for efficiency and re-engages automatically the moment grip drops off. Selec-Terrain gives four modes: Auto, Sport, Snow, and Sand/Mud. The approach and departure angles are 19.6 and 29.4 degrees, respectively, with a breakover angle of 18.8 degrees.
Compass Trailhawk steps up to Jeep Active Drive Low, which adds a 20:1 crawl ratio plus Rock mode, Hill Descent Control, and Selec-Speed Control. Towing is rated at 2,000 lbs (907 kg) when properly equipped.
For a fully electric take on the same idea, the Recon uses front and rear electric drive modules rated at 250 kilowatts each, producing 620 lb-ft of torque with an electronic locking rear differential on the Moab trim.
Match the system to the roads you actually drive:
The right transfer case depends on where you point the vehicle, and that is an easier conversation to have in person. Stop by Cooksville Dodge Chrysler Jeep Ram in Mississauga and walk through the Jeep 4x4 lineup with our team before the weather turns.
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