Control Pressure Too High
- Vacuum leak or improper engine vacuum
- Vacuum modulator valve stuck; water in modulator; modulator valve damaged or not operating properly
- Detent valve or cable stuck in detent position
- Valve body pressure regulator and/or boost valve stuck; boost valve sleeve broken or defective; incorrect pressure regulator valve spring; 2-3 shift control valve and sleeve installed in pressure regulator bore; pressure regulator exhaust hole blocked or not drilled