Control Valve Body Inspection

Control Valve Body Inspection




1. Inspect the control valve body (301) for the following conditions:

* Worn or damaged oil pump drive shaft bearing journal (not serviceable separately from the control valve body)
* Damaged or porous casting
* Damaged sealing surfaces
* Debris in fluid passages




2. Use a small pick or screwdriver. Before disassembly, inspect the control valve body (301) components for the following conditions:

* Valves binding or sticking in their bores or bushings
* Broken, missing or damaged springs
* Missing or damaged retainers
* Damaged solenoid valves
* Debris in valve line-ups or solenoid valves




3. During disassembly, inspect the control valve body for the following conditions:

* Worn or damaged valves, valve bores or bushings
* Broken, missing or damaged springs
* Missing or damaged retainers
* Damaged solenoid valves
* Debris in valve line-ups or solenoid valves




4. Inspect the transmission fluid pressure (TFP) manual valve position switch assembly (395) for the following conditions:

* Damaged electrical connector terminals
* Damaged seals
* Damaged switch membranes
* Debris on the switch membranes