How do you replace sway bars on a 1995 olds 88 royale?

You will need to disconnect the sway bar from the sway bar links(in most cases you might as well replace the links as well since they may snap while trying to remove them). You will then remove the sway bar bushing caps 2 bolts on each of the 2 caps and lower the sway bar. Is the bar cracked? should not require replacing if it isn't cracked. the rubber bushings and links do wear over time and yes the bar can crack.