WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Sealing Ring Removed With Gimmy Bar
Courtesy of VOLVO CARS OF NORTH AMERICA.
Remove sealing ring with a gimmy bar. Take care not to damage the transmission edges.