Shift Solenoids
| Item | Description |
|---|---|
| 1 | Armature/pin assembly |
| 2 | Part information |
The 10R80 utilizes six shift (A-F) solenoids that are linear force solenoids. Unlike previous shift solenoids they are mechanical in nature in that no transmission fluid passes through them. CIDASs use a armature/pin assembly that moves a control valve in the main control valve body to control and apply hydraulic fluid pressure. Each clutch (A-F) has a corresponding shift solenoid (A-F) that is directly proportional in that zero current equals zero pressure and maximum current equals maximum pressure. Since there is no pressure with zero current if the power is interrupted to the shift solenoids none of the clutch packs are able to engage.
Torque Converter Clutch (TCC) Proportional (VFS)
| Item | Description |
|---|---|
| 1 | Solenoid nozzle |
| 2 | Part information |
The TCC solenoid is a variable force solenoid that varies hydraulic pressure by actuating a hydraulic valve. The TCC solenoid uses proportional operation. As the current from the TCM decreases, the pressure from the solenoid decreases. As the current from the TCM increases, the pressure from the solenoid increases.
Normally Low Solenoid
| Item | Description |
|---|---|
| 1. | Low Current |
| 2. | High Exhaust |
| 3. | SF Circuit Fluid (Supply) |
| 4. | Low Pressure Output |
| 5. | High Current |
| 6. | Low Exhaust |
| 7. | SF Circuit Fluid (Supply) |
| 8. | High Pressure Output |
Line Pressure Control (LPC) Solenoid (Inversely-Proportional (VFS)
Normally High Solenoid
| Item | Description |
|---|---|
| 1. | Low Current |
| 2. | Low Exhaust |
| 3. | SF Circuit Fluid (Supply) |
| 4. | High Pressure Output |
| 5. | High Current |
| 6. | High Exhaust |
| 7. | SF Circuit Fluid (Supply) |
| 8. | Low Pressure Output |
Normally high solenoids provide pressure inversely-proportional to supplied current. Normally high solenoids provide full output of pressure with low or no current (50 mA) and very low pressure with high current (850 mA). The LPC solenoid is a normally high solenoid so if power is lost to the solenoid the pressure is at full output.