Clean the constant velocity joint
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.
Wipe off the grease from the constant velocity joint. Note the position of the constant velocity joint on the shaft in order to install it in the correct position later. Measure for example the distance from the inner ring to the inner groove on the shaft.