Extension Housing Rear Oil Seal (4L80-E): Removal
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Tools required: Rear Lubricant Seal Installer (J-41505), Slide Hammer Adapter (J-6125-1B), Universal Seal Remover (J-23129), and Transmission Assembly Lubricant (J-36850).
Raise and support the vehicle. Place a drain pan under the vehicle. Remove the propeller shaft. Remove the output shaft seal (3) from the extension housing (4) using the slide hammer adapter and the universal seal remover (J-6125-1B and J-23129). See Fig 1 . Inspect the case extension housing for damage. Replace the extension housing if necessary.