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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L80-E/4L85-E - Overhaul >> Repair Instructions >> Transmission Oil Pump Assembly Removal

Transmission Oil Pump Assembly Removal

Tools Required

  1. Remove the turbine shaft front oil seal ring (2).
    Fig 1: View Of Turbine Shaft Front Oil Seal Ring
    GM334756Courtesy of GENERAL MOTORS CORP.
  2. Using the J 23129  and the J 6125-1B  , remove the torque converter oil seal assembly (201). See Special Tools .
    Fig 2: Removing Torque Converter Oil Seal
    GM28400Courtesy of GENERAL MOTORS CORP.
  3. Remove the 7 oil pump bolt and seal assemblies (3).
  4. Attach the J 45053  to the oil pump shaft. See Special Tools . Tighten the bolts.
  5. Turn the handle of the J 45053  down onto the turbine shaft in order to raise the oil pump assembly (4) out of the case. See Special Tools .
    Fig 3: Locating Oil Pump Bolt And Seal Assemblies
    GM774704Courtesy of GENERAL MOTORS CORP.
  6. Remove the oil pump assembly (4).
  7. Remove the J 45053  . See Special Tools .
  8. Remove the transmission oil pump gasket (6).
    Fig 4: Removing Oil Pump Gasket
    GM28402Courtesy of GENERAL MOTORS CORP.
  9. IMPORTANT: The selective thrust washer (218) may be stuck to the pump cover.
  10. Remove the selective thrust washer (218).