Push Button Shift Modes
Automatic Return to Park
The vehicle has a safety feature that will automatically shift the transmission into P when one of the following conditions are met at low speed:
- The ignition is turned off and vehicle falls below low speed threshold
- The driver door is opened with the seat belt unlatched
- Unlatching the safety belt while the driver door is open
SelectShift™ Mode
To enter SelectShift™ mode, first select D on the GSM. The SelectShift™ mode is activated by pressing the upshift and downshift paddle switches on the steering wheel.
Stay in Neutral Mode
If necessary for the vehicle to stay in N without the driver present, such as being pulled through a car wash, this mode disables Return to Park. In Stay in Neutral the system will remain awake draining the battery if the engine is off. When you enter neutral at low speed a message will be displayed stating press the N button again to stay in neutral mode. Then, if the driver presses the N button within the time limit, the message Stay in Neutral Mode appears on the multifunction display. During this mode the N position on the GSM flashes continuously and the instrument cluster will display N as the selected gear. To exit the Stay in Neutral Mode, shift out of neutral.
Neutral Tow Mode
Refer to: Transmission Park by Wire Manual Release . for information on moving the transmission into N with the engine off or with a vehicle that will not crank.
Return to Park
The vehicle will default to P when any of the following conditions are met:
- The vehicle is turned off.
- The vehicle is stopped and the driver door is open with the safety belt unlatched.
- The vehicle is stopped and the safety belt is unlatched with the driver door opened.
If the vehicle is turned off while moving, the transmission will first shift into N until it comes to a complete stop and then will shift into P automatically.
Park by Wire
| Item | Description |
|---|---|
| 1 | Park Lock Pawl Valve |
| 2 | Park Lock Pawl Solenoid |
| 3 | TR Sensor |
| 4 | Park Return Spring |
| 5 | Park Pawl Actuator rod |
| 6 | Park Pawl |
| 7 | Output Shaft and Planetary Carrier |
Park by Wire
- Uses a GSM with push buttons in place of a mechanical shifter as the customer interface for selecting (P, R, N, D, M).
- The transmission hydraulic controls are modified using a park lock pawl valve connected to the park rod which unlocks and locks the parking pawl from the carrier.
- Uses clutch B and D hydraulic pressure to push the system out of Park.
- Once out of Park, clutches A, B, C, D or F can continue to hold the system out of Park.
- A park lock pawl solenoid is used to allow the system to remain out of Park when the engine is not running.
- The dual TR sensors indicate the state of the Park system and are not used to determine customer selected range, which is now provided by the GSM.
- A mechanical P override has been provided for in-plant use and towing. This consists of a lever on the side of the transmission that can be bolted into one of 2 positions, normal operating position or park override position. In the override position the park lock pawl valve is held in the applied position to keep the parking pawl unlocked from the carrier.
Park Override Lever
| Item | Description |
|---|---|
| 1 | Park override lever in the normal operating position |
| 2 | Park override lever in the park override position |