Oil Pressure High or Low
Checks
| Causes
|
Oil Pump Assembly
|
| • | Pressure regulator valve stuck |
| • | Pressure regulator valve spring |
| • | Rotor guide omitted or misassembled |
| • | Rotor cracked or broken |
| • | Reverse boost valve or sleeve stuck, damaged or incorrectly assembled |
| • | Orifice hole in pressure regulator valve plugged |
| • | Sticking slide or excessive rotor clearance |
| • | Pressure relief ball not seated or damaged |
| • | Porosity in pump cover or body |
| • | Excessive rotor clearance |
|
Oil Filter
|
| • | Intake pipe restricted by casting flash |
| • | Cracks in filter body or intake pipe |
| • | O-ring seal missing, cut or damaged |
| • | Wrong grease used on rebuild |
|
Control Valve Body
|
| • | Manual valve scored or damaged |
| • | Spacer plate or gaskets incorrect, misassembled or damaged |
| • | Checkballs omitted or misassembled |
|
Pressure Control Solenoid
| Damage to pins
|
Transmission Fluid
Pressure Manual Valve Position Switch
|
|
Case
| Case to control valve body face not flat
|
System Voltage
|
| • | 12 volts not supplied to transmission |
| • | Electrical short (pinched solenoid wire) |
|
