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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission - 4L80-E/4L85-E - Introduction & Repair Instructions) >> Repair Instructions >> Transmission Extension Housing Assembly Replacement >> Installation Procedure

Installation Procedure

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    Fig 1: Transmission Case Extension
    GM747478Courtesy of GENERAL MOTORS CORP.
  1. Install a new case extension O ring seal (2).
  2. Install the case extension (1).
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the case extension bolts (3).

    Tighten:  Tighten the case extension bolts (3) to 34 N.m (25 lb ft).

  4. Install the transmission support and the transmission mount. Refer to Transmission Mount Replacement .
  5. Install the propeller shaft. Refer to Propeller Shaft Replacement - One Piece or Propeller Shaft Replacement - Two Piece in Propeller Shaft.
  6. Remove the drain pan and the transmission jack.
  7. Lower the vehicle.
  8. Fill the transmission to the proper level with Dexron® III transmission fluid. Refer to Transmission Fluid Checking Procedure .