GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Generic 🢒 1998 🢒 Unit Repair 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 3L30 🢒 Transmission Fluid Pump Disassemble

    Object Number: 181630 Size: SH
  1. Remove the oil pump drive gear (210) and driven gear (209). Mark the location of the oil pump drive and driven gears to assure proper assembly.

    2. Object Number: 181634 Size: SH
  2. Remove the oil pump to case gasket (207).
  3. Remove the oil pump outer seal (223).

    4. Object Number: 181635 Size: SH
  4. Remove the second clutch oil seal rings (225).
  5. Inspect the oil seal rings for wear and damage.

    6. Object Number: 181636 Size: SH

    Important: Do not remove the converter clutch control valve, the pressure regulator valve or the reverse boost valve unless determined by fluid pressure checks to be malfunctioning.

    Caution: Valve Springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.

  6. Remove the converter clutch control valve bore plug retainer pin (220).
  7. Remove the clutch control valve bore plug (219).
  8. Remove the clutch control valve spring (218).
  9. Remove the clutch control valve (217).
  10. Inspect the converter clutch control valve for:
    11. • nicks
    • scoring
    • damage

    Object Number: 181637 Size: SH
  11. Remove the oil pump boost valve sleeve retainer pin (211). Apply thumb pressure on the oil pump boost valve sleeve (212) to relieve the spring tension from the retainer pin.
  12. Remove the oil pump boost valve sleeve (212).
  13. Remove the oil pump boost valve (213).
  14. Remove the pressure regulator valve spring (215) and spring seats (214).
  15. Remove the pressure regulator valve (216).
  16. Inspect the oil pump boost valve and the pressure regulator valve for:
    17. • nicks
    • scoring
    • damage