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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 Installation >> Tools Required

Tools Required

J 25025-1  Guide Pins

  1. Install the J 25025-1  at the 12 o'clock and the 5 o'clock positions.
    Fig 1: Aligning J 25025-1 At 12:00 & 5:00 Positions
    GM31229Courtesy of GENERAL MOTORS CORP.
  2. Install the transmission oil pump gasket (6).
  3. IMPORTANT: When installing the oil pump assembly (4), position the bolt holes closest together toward the bottom of valve body side of the transmission case assembly.
    IMPORTANT: If you cannot rotate the turbine shaft while lowering the oil pump assembly into place, then you have improperly installed the overrun clutch assembly, the fourth clutch assembly, the forward clutch assembly and/or the direct clutch assembly. These components have not indexed with all of the clutch plates. Correct the condition before installing the oil pump assembly.
    Fig 2: View Of Oil Pump Assembly
    GM31230Courtesy of GENERAL MOTORS CORP.
  4. Install the oil pump assembly (4) into the transmission case assembly.
  5. Remove J 25025-1  .
  6. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  7. Install the 7 transmission oil pump bolt and seal assemblies (3).

    Tighten:  Tighten the bolts to 24 N.m (18 lb ft).

  8. Install the turbine shaft front oil seal ring (2).
    Fig 3: View Of Turbine Shaft Front Oil Seal Ring
    GM334756Courtesy of GENERAL MOTORS CORP.