Control Valve Upper Body Assembly Cleaning and Inspection
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
| Callout | Component Name |
|---|---|
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WARNING:
Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
CAUTION:
Do not remove the exhaust backfill pressure relief retainer, spring, or ball valve (refer to arrow in above illustration for location). The retainer is set to a precise depth. Replacement of this retainer could cause internal transmission damage.
CAUTION:
After cleaning the transmission components, allow to air dry. Do not use cloth or paper towels in order to dry any transmission components. Lint from the towels can cause component failure.
CAUTION:
Preliminary Procedure Clean and inspect all valve components, locating pins, and the valve body. The control valve upper body is replaceable only as an assembly.Do not reuse cleaning solvents. Previously used solvents may deposit sediment which may damage the component. |
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| 1 | Clutch Boost Valve Train |
| 2 | 1-2-3-4 Clutch Regulator Valve Train |
| 3 | 3 - 5 Reverse Clutch Regulator Valve Train |
| 4 | Clutch Boost Valve Train |
| 5 | 2 - 6 Clutch Regulator Valve Train |
| 6 | Clutch Boost Valve Train |
| 7 | 1-Reverse Band and 4-5-6 Clutch Regulator Valve Train |
| 8 | Actuator Feed Limit Valve Train |
| 9 | Control Valve Body Locator Pin |
| 10 | Control Valve Body Locator Pin [3x] |