(4L) Operation

(4L) provides mechanically locked four-wheel drive power to both the front and rear wheels for use on low traction surfaces but does so with an additional gear reduction for increased torque multiplication. Intended only for off-road applications such as deep sand, steep grades or pulling heavy objects. (4L) does not engage when your vehicle is moving above 3.1 mph (5 km/h); this is normal and should be no reason for concern.

Shifts to and from (4L) can only be made below 3.1 mph (5 km/h) with the transmission in Neutral. When performing this shift, wait until the 4x4 Shift in Progress message disappears in the IPC before moving the selector lever back to Drive. If the vehicle speed or transmission range is not within parameters, the message center will indicate the necessary action needed to complete the shift. In (4L):

• The ATCM sends a (4L) mode status to the AWD module via the GWM.
• The front axle disconnect actuator is connected.
• The shift motor is in the full CW position:
  • The range fork and reduction sleeve connect the planetary carrier and output shaft.
  • The mode fork and synchronizer sleeve engage the output shaft and drive gear.

• The shift motor positions the ball ramp device to completely apply the clutch.
• The shift motor positions the reduction sleeve connecting the planetary carrier and output shaft
• (4L) is displayed in the message center.