Removing the control system cover
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Remove the Torx TX40 screws for the control system cover.
Clean the sealing compound from the threads. Use tap M8 x 1.25.
Remove the cover. Use gasket wedge 9995477 . Carefully tap it in between the cover and transmission so that the cover's seal flange is not distorted.
Clean the gasket residue from the cover and the gearbox.
NOTE:
Make sure that no debris enters the transmission. Clean the cover thoroughly.