Installing the sealing ring
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.
Install a new sealing ring
Apply automatic transmission fluid (ATF) to the ring.
Tap the new ring into place. Use drift 9995476 .