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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 10L80 (MHS MHU MQC) - Repair Instructions - On Vehicle (1 Of 2) >> Repair Instructions - On Vehicle >> Automatic Transmission Case Extension Replacement (RWL) >> Installation Procedure

Installation Procedure

  1. GM5596345Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Case Extension Seal (3) - Install NEW

  2. Lubricate the inner diameter of the transmission output shaft seal with NEW transmission fluid prior to installing the automatic transmission case extension. Adhesives, Fluids, Lubricants, and Sealers
  3. Automatic Transmission Case Extension (2) - Install
  4. CAUTION:

    Refer to Fastener Caution .

  5. Automatic Transmission Case Extension Bolt (1) - Install and tighten in sequence [6x] - Fastener Specifications
  6. GM5654072Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Install the 2 wiring harness retainers (1).

  7. GM5587069Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount (2) - Install

  8. Transmission Mount Bolt (1) - Install and tighten [2x] - Fastener Specifications
  9. GM5587449Courtesy of GENERAL MOTORS COMPANY

    Transmission Support Crossmember (1) - Install

  10. GM5587388Courtesy of GENERAL MOTORS COMPANY

    Transmission Support Crossmember Bolt (3) - Install [4x]

  11. Transmission Support Crossmember Nut (2) - Install and tighten [4x] - Fastener Specifications
  12. Transmission Mount Nut (1) - Install and tighten - Fastener Specifications
  13. GM5565710Courtesy of GENERAL MOTORS COMPANY

    Position the wiring harness (2) as necessary then install the harness into the 3 wiring harness retainers (1).

  14. Remove the transmission jack.
  15. GM5544194Courtesy of GENERAL MOTORS COMPANY

    Propeller Shaft (1) - Install

  16. GM5544191Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  17. Rear Propeller Shaft Bolt (1) - Install and tighten [4x] - Fastener Specifications
  18. Lower the vehicle.
  19. If necessary, check the transmission fluid level and condition. Transmission Fluid Level and Condition Check