I would strongly suggest you consider doing strut bearings while you are at it. Although expensive, this is the time to take care of them. Volvo bearings are best but some aftermarket ones have been a problem in the past. I think one post identified a common manufacturer for the Volvo parts and for the current Scan Tech bearings, so that might be the best available. You should also have some good spare boots on standby, as you might find out yours are in tatters. I would only get those used from a pick and pull though to keep cost down. If you use the HD Bilstiens, they come with a boot, no stops necessary.