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Home >> Chevrolet >> 2007 >> Avalanche 5.3 3 >> Repair and Diagnosis >> External Pages >> Different car >> Section 893 (Automatic Transmission - 6L50/6L80/6L90 - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - On Vehicle >> Manual Shift Shaft and Seal Replacement

Manual Shift Shaft and Seal Replacement

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Manual Shift Shaft & Components
GM1655113Courtesy of GENERAL MOTORS CORP.
Manual Shift Shaft and Seal Replacement

Callout Component Name
IMPORTANT: The manual shaft must be removed to replace the manual shaft seal.

Preliminary Procedures

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the transmission from the vehicle. Refer to Transmission Replacement .
  3. Remove the transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement .
  4. Remove the control valve body. Refer to Control Valve Lower Body and Upper Body Replacement .
1 Manual Shift Shaft Pin
Tip: 
  • Discard the pin. Replace with NEW pin.
  • "Walk" the pin out using side cutters.
2 Manual Shaft Detent Lever Hub Pin
Tip: 
  • Discard the pin. Replace with NEW pin.
  • "Walk" the pin out using side cutters.
3 Manual Shift Shaft
4 Manual Shift Shaft Seal
Tip: 
  • Use the J 45201  Cooler Line Seal Remover, to remove the seal from the transmission case. See Special Tools .
  • Use the J 43909  Selector Shaft Seal Installer, to install the seal into the transmission case.