How Jeep 4x4 Systems Work
Beholding the power of a Jeep® 4x4 system is, well, something you have to experience as a driver. But, for now, reading will have to suffice (bummer, eh?). There are six systems available — each precious in their own way.
Quadra-Trac II ®
This active full-time system functions in all-wheel-drive until additional traction is needed, then reacts by electronically engaging the clutch pack to transfer up to 100% of the torque to either axle. This system also features 2.72:1 LOW-RANGE and NEUTRAL.
Standard on Commander Limited and Grand Cherokee CRD, Limited and S Limited.

