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Home >> GMC >> 2005 >> 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

    Fig 1: View Of Turbine Shaft Front Oil Seal Ring
    GM334756Courtesy of GENERAL MOTORS CORP.
  1. Remove the turbine shaft front oil seal ring (2).
  2. Fig 2: Removing Torque Converter Oil Seal Assembly
    GM28400Courtesy of GENERAL MOTORS CORP.
  3. Using the J 23129  and the J 6125-1B  , remove the torque converter oil seal assembly (201). See Special Tools .
  4. Fig 3: Removing Oil Pump Bolts & Oil Pump Assembly
    GM774704Courtesy of GENERAL MOTORS CORP.
  5. Remove the 7 oil pump bolt and seal assemblies (3).
  6. Attach the J 45053  to the oil pump shaft. See Special Tools . Tighten the bolts.
  7. 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 .
  8. Remove the oil pump assembly (4).
  9. Remove the J 45053  . See Special Tools .
  10. Fig 4: Removing Transmission Oil Pump Gasket & Selective Thrust Washer
    GM28402Courtesy of GENERAL MOTORS CORP.
  11. Remove the transmission oil pump gasket (6).
  12. IMPORTANT: The selective thrust washer (218) may be stuck to the pump cover.
  13. Remove the selective thrust washer (218).