Assuming it isn't much different than the '92 700/900, the closest thing to a special tool needed is a star/torx key, or a sufficiently stubby phillips screwdriver. May want to hose down the tranny oil lines with PBlaster the night before, but otherwise is straightforward.

This may also be a good time to replace:
heater hoses
heater valve
resevoir cap and tank
rad hoses
J hoses at oil filter extension (if applicable)

They are all bound to go eventually, usually just after flushing and refilling the system with extra-pricey Volvo coolant (Now made with pure gold!), or at least on a highway somewhere with banjos playing gently in the background.