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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Automatic Transmission - 8L90 (M5U) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Case Extension Disassemble

Case Extension Disassemble

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

Equivalent regional tools:Special Tools

  1. GM3774675Courtesy of GENERAL MOTORS COMPANY

    Use DT-47693-2  compressor and an arbor press to install the retaining ring.

  2. 1-2-3-4-5-Reverse Clutch Piston Dam Retaining Ring (1) - Remove and DISCARD
  3. 1-2-3-4-5-Reverse Clutch Piston Dam (2) - Remove
  4. CAUTION:

    Refer to Seal Reuse Caution .

  5. 1-2-3-4-5-Reverse Clutch Piston Dam Seal (3) - Remove and DISCARD
  6. 1-2-3-4-5-Reverse Clutch Piston Inner Seal (4) - Remove and DISCARD
  7. 1-2-3-4-5-Reverse Clutch Piston O-Ring Seal (5) - Remove and DISCARD
  8. 1-2-3-4-5-Reverse Clutch Piston Return Spring (6) - Remove
  9. GM3774679Courtesy of GENERAL MOTORS COMPANY

    1-2-3-4-5-Reverse Clutch Piston (1) - Remove

  10. CAUTION:

    Refer to Seal Reuse Caution .

  11. 1-2-3-4-5-Reverse Clutch Piston Outer Seal (2) - Remove and DISCARD
  12. 1-2-3-4-5-Reverse Clutch Piston Inner Seal (3) - Remove and DISCARD
  13. Assemble special tools to use to remove the bearing.
  14. Ensure the feet of DT-26941  Bushing and Bearing Remover are properly engaged with the bearing.
  15. Output Shaft Bearing (4) - Remove
  16. GM3774682Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Case Extension Hole Plug (1) - Remove [2x]