Park By Wire System
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
| Component | Number |
|---|---|
| Park Lock Pawl Valve | 1 |
| Park Lock Pawl Solenoid | 2 |
| TR Sensor | 3 |
| Park Return Spring | 4 |
| Park Pawl Actuator Rod | 5 |
| Park Pawl | 6 |
| Output Shaft and Planetary Carrier | 7 |
Park by Wire
- Uses a GSM with a push-button 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 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 proveded by the GSM.
- Clutches B and D require front pump hydraulic fluid pressure in order for the park lock pawl valve to overcome park return spring pressure and move the park pawl actuator rod and disengage park. For use in cases where the engine won't crank, a mechanical 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 control or override. In the override position the park lock pawl valve is held in the applied position to keep the parking pawl unlocked from the carrier. To move the vehicle out of park when the engine cranks but won't start, Refer to: External Controls - System Operation and Component Description .