my rear suspension is really really creaky. it is really annoying. what would cause this? i have x2c upper and lower control arms with urethane bushings, do i need to grease them, or is this normal with uca/lca? i also still have the original shocks back there, but only have 65k on the car, should i replace those as well (car doesnt bounce excessively if i push down the trunk)? or is my car just getting hold and i should live with the noises? it kinda reminds me of riding in a fox body lol