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Home >> Chevrolet >> 2005 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 439 (Automatic Transmission - 5L40-E/5L50-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Transmission Fluid Pump Assemble

Transmission Fluid Pump Assemble

WARNING: This page is about a different car, the 2007 Saturn Sky. However, it is still accessible from the selected car via links, so may be relevant.
Tools Required

J 21368  Pump Body Cover Alignment Band. See Special Tools 

    Fig 1: Inspecting Oil Pump Bushing For Wear
    GM801912Courtesy of GENERAL MOTORS CORP.
  1. Inspect the bushing (215) for wear - not serviceable.
    2. Fig 2: View Of Oil Pump Components
    GM801913Courtesy of GENERAL MOTORS CORP.
  2. Inspect the oil pump parts for the following:
    • Worn, scored or gouged pump slide
    • Cracks, wear or damage to the rotor or vanes
    • Cuts or damage to the seals
    • Broken priming springs
    3. Fig 3: Identifying Oil Pump Housing Inspection Areas
    GM801914Courtesy of GENERAL MOTORS CORP.
  3. Inspect the oil pump housing for the following:
    • Porosity
    • Interconnected oil passages
    • Damaged machined surfaces
    4. Fig 4: Locating Oil Pump Valves
    GM801915Courtesy of GENERAL MOTORS CORP.
  4. Inspect the valves (207, 210, 235) and springs (208, 209, 234, 238, 219) for the following:
    • Nicks or burrs on the valves
    • Worn, distorted or cracked springs
    5. Fig 5: TCC Control Valve, Retainer & Spring
    GM801909Courtesy of GENERAL MOTORS CORP.
  5. Install the TCC control valve (235) and the TCC control valve spring (234).
  6. Install the TCC control valve spring retainer (204).
    7. Fig 6: Identifying Pressure Relief Valve & Spring
    GM801908Courtesy of GENERAL MOTORS CORP.
  7. Install the pressure relief valve (239) and spring (238).
  8. Install the pressure valve spring retainer (211).
    9. Fig 7: View Of Pump Cover Screen
    GM801907Courtesy of GENERAL MOTORS CORP.
  9. Install the pump cover seal (212) onto the new pump cover screen (213).
  10. Install the pump cover screen (213).
  11. Install the pump cover screen pin (211).
    12. Fig 8: Identifying Pressure Regulator Valve & Line Boost Valve
    GM801906Courtesy of GENERAL MOTORS CORP.
  12. Install the pressure regulator valve (210), the pressure regulator valve spring (209), and the line boost valve spring (208).
  13. Install the line boost valve bushing seal (205) onto the bushing (206).
  14. Install the line boost valve (207) and the bushing (206).
  15. Install the line boost valve bushing retainer (204).
    16. Fig 9: Locating Reverse Clutch Housing Fluid Seal Rings
    GM801905Courtesy of GENERAL MOTORS CORP.
  16. Install the reverse clutch housing fluid seal rings (200).
    17. Fig 10: Measuring Gage Bar To Pump Body Gap
    GM851063Courtesy of GENERAL MOTORS CORP.
  17. Measure the distance from the bottom of the gage bar to the pump body. Refer to Transmission Fluid Pump Specifications .
  18. Measure the thickness of pump slide.
  19. Select the proper size, refer to Transmission Fluid Pump Specifications .
  20. Measure the thickness of the pump rotor.
  21. Select the proper size rotor refer to Transmission Fluid Pump Specifications .
    22. Fig 11: Identifying Fluid Pump Components
    GM801904Courtesy of GENERAL MOTORS CORP.
  22. Install the fluid pump support (217), the slide seal (218) and the fluid pump slide rings (220), and the fluid pump slide o-ring seal (242) onto the pump slide (216).
  23. Install the slide pin (231).
    24. IMPORTANT: The fluid pump slide (216) is selective.
  24. Install the pump slide (216).
  25. Using a screwdriver install the slide spring (219).
    26. Fig 12: Locating Fluid Pump Vane Ring
    GM801903Courtesy of GENERAL MOTORS CORP.
  26. Install the fluid pump vane ring (225).
  27. Install the pump rotor guide (224).
    28. IMPORTANT: The fluid pump rotor (223) is selective.
  28. Install the pump rotor (223).
  29. Install the pump vanes (222).
  30. Install the pump vane ring (221).
    31. Fig 13: View Of Pump Cover Housing
    GM801902Courtesy of GENERAL MOTORS CORP.
  31. Install the pump cover housing (202) onto the converter housing.
    32. Fig 14: Identifying J 21368
    GM801916Courtesy of GENERAL MOTORS CORP.
  32. Install J 21368  and tighten. See Special Tools .
    33. Fig 15: Installing Oil Pump Housing Bolts
    GM801917Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  33. Install the oil pump housing bolts (240, 241).

    Tighten: 

    • Tighten the fluid pump housing bolts (240) to 11 N.m (8 lb ft).
    • Tighten the fluid pump housing bolts (241) to 22 N.m (16 lb ft).

  34. Remove J 21368  . See Special Tools .
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