FOUR-WHEEL DRIVE OPERATION — IF EQUIPPED
Four-wheel drive trucks are equipped with either a manu- ally shifted transfer case or an electronically shifted transfer case. Refer to the operating instructions for your transfer case, located in this section for further information.
This is an electronic shift transfer case and is operated by the 4WD Control Switch (Transfer Case Switch), which is located on the instrument panel.
Four-Position/On-Demand Transfer Case — Eight Speed Transmission Only
This electronically shifted transfer case provides four mode positions:
For additional information on the appropriate use of each transfer case mode position, see the information below:
2WD
Two-Wheel Drive High Range — This range is for normal street and highway driving on dry hard surfaced roads.
4WD HIGH 5
Four-Wheel Drive High Range — This range provides torque to the front driveshaft (engages four-wheel drive) which allows front and rear wheels to spin at the same speed. This provides additional traction for loose or slippery road surfaces only.
4WD LOW
Four-Wheel Drive Low Range — This range provides low speed four-wheel drive. It maximizes torque (increased torque over 4WD HIGH) to the front driveshaft; allowing front and rear wheels to rotate at the same speed. This range provides additional traction and maximum pulling power for loose or slippery road surfaces only. Do not exceed 25 mph (40 km/h) in this range.
NEUTRAL (N)
Neutral — This range disengages both the front and rear driveshafts from the powertrain. To be used for flat towing behind another vehicle. Refer to “Recreational Towing” in this section for further information.
This electronically shifted transfer case is designed to be driven in the two–wheel drive position (2WD) for normal street and highway conditions on dry hard surfaced roads). Driving the vehicle in 2WD will have greater fuel economy benefits as the front axle is not engaged in 2WD.
When additional traction is required, the transfer case 4WD HIGH and 4WD LOW positions can be used to maximize torque to the front driveshaft, forcing the front and rear wheels to rotate at the same speed. This is accomplished by pushing the desired position on the 4WD control switch.
Refer to “Shifting Procedure” in this section for specific shifting instructions.
The 4WD HIGH and 4WD LOW positions are designed for loose, slippery road surfaces only. Driving in the 4WD HIGH and 4WD LOW positions on dry, hard surfaced roads may cause increased tire wear and damage to the driveline components.
NOTE:
The transfer case NEUTRAL button is located in the center of the 4WD Control Switch and is pushed by using a ballpoint pen or similar object. The transfer case NEUTRAL position is to be used for recreational towing only. Refer to “Recre- ational Towing” in “Starting And Operating” for further information.
Transfer Case Position Indicator Lights
The Transfer Case Position Indicator Lights (4WD and 4LOW) are located in the instrument cluster and indicate the current and desired transfer case selection. When you select a different transfer case position, the indicator lights will do the following:
If the transfer case does not shift into the desired position, one or more of the following events may occur:
NOTE:
Before retrying a selection, make certain that all the neces- sary requirements for selecting a new transfer case position have been met. To retry the selection, push the current posi- tion, wait five seconds, and retry selection. To find the shift requirements, refer to the "Shifting Procedure" for your transfer case, located in this section.
The “SVC 4WD Warning Light” monitors the electronic shift four-wheel drive system. If this light remains on after engine start up or illuminates during driving, it means that the
four-wheel drive system is not functioning properly and that 5
service is required.
NOTE:
Do not attempt to make a shift while only the front or rear wheels are spinning. This could cause damage to driveline components.
When operating your vehicle in 4WD LOW, the engine speed is approximately three times that of the 2WD or 4WD HIGH positions at a given road speed. Take care not to over- speed the engine and do not exceed 25 mph (40 km/h).
Proper operation of four-wheel drive vehicles depends on tires of equal size, type and circumference on each wheel. Any difference in tire size can cause damage to the drive- train.
Because four-wheel drive provides improved traction, there is a tendency to exceed safe turning and stopping speeds. Do not go faster than road conditions permit.
NOTE:
until the transfer case completes the shift. When the shift is complete, the position indicator light for the selected posi- tion will stop flashing and remain ON.
This is an electronic shift transfer case and is operated by the 4WD Control Switch (Transfer Case Switch), which is located on the instrument panel.
Five-Position/On-Demand Transfer Case — Eight Speed Transmission Only
This electronically shifted transfer case provides five mode positions:
For additional information on the appropriate use of each transfer case mode position, see the information below:
2WD
Two-Wheel Drive High Range — This range is for normal street and highway driving on dry hard surfaced roads.
4WD AUTO
Four-Wheel Drive Auto High Range — This range sends power to the front wheels automatically when the vehicle senses a loss of traction. This range may be used during varying road conditions.
4WD HIGH
Four-Wheel Drive High Range — This range provides torque to the front driveshaft (engages four-wheel drive) which allows front and rear wheels to spin at the same speed. This provides additional traction for loose or slippery road surfaces only.
4WD LOW
Four-Wheel Drive Low Range — This range provides low speed four-wheel drive. It maximizes torque (increased torque over 4WD HIGH) to the front driveshaft; allowing front and rear wheels to rotate at the same speed. This range provides additional traction and maximum pulling power for loose or slippery road surfaces only. Do not exceed 25 mph (40 km/h) in this range.
NEUTRAL (N)
Neutral — This range disengages both the front and rear driveshafts from the powertrain. To be used for flat towing behind another vehicle. Refer to “Recreational Towing” in this section for further information.
This electronically shifted transfer case is designed to be driven in the two–wheel drive position (2WD) or four-wheel drive auto position (4WD AUTO) for normal street and highway conditions on dry, hard surfaced roads. Driving the vehicle in 2WD will have greater fuel economy benefits as the front axle is not engaged in 2WD.
For variable driving conditions, the 4WD AUTO mode can be used. In this mode, the front axle is engaged, but the vehicle's power is sent to the rear wheels. Four-wheel drive will be automatically engaged when the vehicle senses a loss of traction. Because the front axle is engaged, this mode will result in lower fuel economy than the 2WD mode.
When additional traction is required, the transfer case 4WD HIGH and 4WD LOW positions can be used to maximize torque to the front driveshaft, forcing the front and rear wheels to rotate at the same speed. This is accomplished pushing the desired position on the 4WD Control Switch.
Refer to “Shifting Procedure” in this section for specific shifting instructions.
The 4WD HIGH and 4WD LOW positions are designed for loose, slippery road surfaces only. Driving in the 4WD HIGH and 4WD LOW positions on dry hard surfaced roads may cause increased tire wear and damage to the driveline components.
NOTE:
The transfer case NEUTRAL button is located in the center of the 4WD Control Switch and is pushed by using a ballpoint pen or similar object. The transfer case NEUTRAL position is to be used for recreational towing only. Refer to “Recreational Towing” in “Starting And Operating” for further information.
Transfer Case Position Indicator Lights
The Transfer Case Position Indicator Lights (4WD HIGH, 4LOW, and 4WD AUTO) are located in the instrument cluster and indicate the current and desired transfer case selection. When you select a different transfer case position, the indicator lights will do the following:
If the transfer case does not shift into the desired position, one or more of the following events may occur:
NOTE:
Before retrying a selection, make certain that all the neces- sary requirements for selecting a new transfer case position have been met. To retry the selection, push the current posi- tion, wait five seconds, and retry selection. To find the shift requirements, refer to the "Shifting Procedure" for your transfer case, located in this section.
The “SVC 4WD Warning Light” monitors the electronic shift four-wheel drive system. If this light remains on after engine start up or illuminates during driving, it means that the
four-wheel drive system is not functioning properly and that 5
service is required.
NOTE:
Do not attempt to make a shift while only the front or rear wheels are spinning. This could cause damage to driveline components.
When operating your vehicle in 4WD LOW, the engine speed is approximately three times that of the 2WD, 4WD AUTO or 4WD HIGH positions at a given road speed. Take care not to overspeed the engine and do not exceed 25 mph (40 km/h).
Proper operation of four-wheel drive vehicles depends on tires of equal size, type and circumference on each wheel. Any difference in tire size can cause damage to the drive- train.
Because four-wheel drive provides improved traction, there is a tendency to exceed safe turning and stopping speeds. Do not go faster than road conditions permit.
NOTE:
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