how much should parts and labor cost to install new struts

Push down and check for noise.

DUAL-PUMP fluid from DEALER for rear differential.It generally only makes noise on turns, At slower speeds it's a lot more noticable and sounds a lot like drum brake howl (like the emergency brake is dragging) Honda has a service bulletin on this complaint for the newer CR-Vs ~ '05-'07~ Most of the time though , it is just a matter of normal maintenance(often neglected). Not the struts.