TRANSMISSION DESCRIPTION
The 4R70W has the following features
- Wide ratio gears
- Four speeds
- Rear wheel drive
- Automatic
- Electronic shift
- Torque converter clutch control
- Line pressure controls
The transmission uses Ravigneaux-style double-pinion gearset with two bands, one one-way roller clutch, one mechanical diode and four friction clutches to produce four forward gears and Reverse.
Scheme 13
All vehicles are equipped with a Vehicle Certification Label, located on the driver side door lock post. For correct transmission identification, refer to the code in the space marked TR.
For model, service ID level or build date information, refer to the transmission service ID tag located on the transmission case.
Scheme 14
Solenoid Operation Chart
| Selector Lever Position | PCM Commanded Gear | Solenoids | ||
|---|---|---|---|---|
| SSA | SSB | TCC | ||
| P/R/N | 1 | ON | OFF | HD |
| (D) | 1 | ON | OFF | HD |
| (D) | 2 | OFF | OFF | EC |
| (D) | 3 | OFF | ON | EC |
| (D) | 4 | ON | ON | EC |
| W/OD OFF | ||||
| 1 2 3 | 1 2 3 | ON OFF OFF | OFF OFF ON | HD EC EC |
| Manual 2 | 2 | OFF | OFF | EC |
| Manual 1 (2) | 1 2 | ON OFF | OFF OFF | HD EC |
| (1) EC = Electronically Controlled, HD = Hydraulically Disabled. (2) When a manual pull-in occurs above a calibrated speed, the transmission will not downshift from the higher gear until the vehicle speed drops below this calibrated speed. | ||||
| (1) | EC = Electronically Controlled, HD = Hydraulically Disabled. |
| (2) | When a manual pull-in occurs above a calibrated speed, the transmission will not downshift from the higher gear until the vehicle speed drops below this calibrated speed. |
SOLENOID OPERATION CHART (1)
| Gear Lever Position | PCM Commanded Gear | Solenoids | ||
|---|---|---|---|---|
| SSA | SSB | TCC | ||
| P/R/N | 1 | ON | OFF | HD |
| (D) | 1 | ON | OFF | HD |
| (D) | 2 | OFF | OFF | EC |
| (D) | 3 | OFF | ON | EC |
| (D) | 4 | ON | ON | EC |
| (D) | ||||
| W/OD OFF | ||||
| 1 | 1 | ON | OFF | HD |
| 2 | 2 | OFF | OFF | EC |
| 3 | 3 | OFF | ON | EC |
| Manual 2 | 2 | OFF | OFF | EC |
| Manual 1 (2) | 1 2 | ON OFF | OFF OFF | HD EC |
| (1) EC = Electronically controlled and HD = Hydraulically disabled (2) When a manual pull-in occurs above a calibrated speed the transmission will downshift from the higher gear until the vehicle speed drops below this calibrated speed. | ||||
| (1) | EC = Electronically controlled and HD = Hydraulically disabled |
| (2) | When a manual pull-in occurs above a calibrated speed the transmission will downshift from the higher gear until the vehicle speed drops below this calibrated speed. |
SOLENOID OPERATION CHART (1)