On top of the way-neat list is the Quadra-Trac II transfer case, a unique full-time unit. Similar to other Jeep units in shape and design, the NV247 incorporates a gerotor pump (arrow) and a multidisc clutch pack. In normal operation, most of the power is sent to the rear axle, but if a difference in driveshaft speeds is noted, the gerotor pump sends oil to the clutch pack, effectively locking the driveshafts together. No driver input is needed, and the transition is nearly undetectable by the driver. For your low-range use, the transfer case solidly locks the two output shafts together and features a ratio of 2.72:1.