Control Solenoid Valve Assembly Supply and Control Fluid Inspection
WARNING: This page is about a different variant/trim than selected.
| Callout | Component Name |
|---|---|
| 1 | Shift Solenoid 1 Supply Port |
| 2 | Shift Solenoid 1 Control Port |
| 3 | Line Pressure Control Solenoid 1 Control Port |
| 4 | Line Pressure Control Solenoid 1 Supply Port |
| 5 | Pressure Control Solenoid 5 Supply Port |
| 6 | Pressure Control Solenoid 5 Control Port |
| 7 | TCC Pressure Control Solenoid Control Port |
| 8 | TCC Pressure Control Solenoid Supply Port |
| 9 | Shift Solenoid 2 Supply Port |
| 10 | Shift Solenoid 2 Control Port |
| 11 | Pressure Control Solenoid 2 Control Port |
| 12 | Pressure Control Solenoid 2 Supply Port |
| 13 | Pressure Control Solenoid 4 Supply Port |
| 14 | Pressure Control Solenoid 4 Control Port |
| 15 | Pressure Control Solenoid 3 Control Port |
| 16 | Pressure Control Solenoid 3 Supply Port |
| 17 | Transmission Fluid Pressure (TFP) Switch 5 |
| 18 | Transmission Fluid Pressure (TFP) Switch 3 |
| 19 | Transmission Fluid Pressure (TFP) Switch 1 |
| 20 | Transmission Fluid Pressure (TFP) Switch 4 |
| 21 | TFP Switch Membrane |
| 22 | TFP Switch Gasket |
- With the filter plate removed, the control solenoid valve fluid supply and control ports (1-16) can be inspected. Solenoid openings are identified in the illustration. Inspect the following supply and control opening for material particles, metallic slivers, debris, or sediment. Look into solenoid fluid supply openings 1, 4, 5, 8, 9, 12, 13, and 16. Look inside the solenoid fluid control ports 2, 3, 6, 7, 10, 11, 14 and 15. If sediment or debris is found in any one of these port openings, look for holes or tears in the filter plate screen. The filter plate gasket may be leaking caused by a torn gasket, poor sealing, or a deformed plate. As necessary, thoroughly flush away all debris in the supply and control fluid ports with GM Brake Parts Cleaner.
- Inspect the four transmission fluid pressure (TFP) switches (17-20) for trapped debris or sediment. Any sediment or debris found under a switch membrane requires the control solenoid (w/body and TCM) valve assembly to be replaced. Check all TFP switch membranes (21) for cracks, cuts or pin holes. Ensure all TFP switch gaskets (22) are secure and are not deformed, torn, or improperly seated. As necessary, thoroughly rinse debris and sediment from the top of the switches. It is not necessary to remove the clutch plate soot from the entire surface of the control solenoid (w/body and TCM) valve assembly housing.