while trying to track down a rear end knock, i have found the lower suspension arm bushes are worn, you cant move them up and down but you can slide them side to side on the bolt rods, im not sure if this ok but im assuming its not, i can move them quite easily with one hand, would this cause a knocking noise from the back of the car when i go over pot holes
what sort of money would it cost to replace them, is rubber the best option for a every day car
thanks

moved to suspension,driveline workshop..