Control Valve Body: Inspection
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2003 Pontiac Montana, 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Pontiac Aztek, and 2003 Oldsmobile Silhouette. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect control valve body for worn or damaged oil pump drive shaft bearing journal (not serviceable separately from control valve body), damaged or porous casting, damaged sealing surfaces and debris in fluid passages.
- Before disassembly, inspect control valve body components using small pick or screwdriver for valves binding or sticking in bores or bushings, broken, missing or damaged springs, missing or damaged retainers, damaged solenoid valves or debris in valve line-ups or solenoid valves.
- During disassembly, inspect control valve body for 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.
- Inspect Transmission Fluid Pressure (TFP) manual valve position switch assembly for damaged electrical connector terminals, damaged seals, damaged switch membranes or debris on switch membranes. See Figure.