i found out mine were bad when hitting a bump going around a corner . the front end would hop over and the wheel would shake back and forth. i took it in and they told me the shocks were ok. i took the service manager for a ride in the parking lot to prove him wrong. if you go to a parking lot and get the vx going in drive and hit the brakes and the front does a big nose dive the shocks are bad. also when you do this the front of the vehicle will continue to go up and down a few times before it will stop moving. that is what the shocks are supposed to control. right now i have the rancho 9000's and one of the fronts is bad so when i stop fast i get one side that does a nose dive. i made sure to bring up the fact of how unsafe it was to drive. shawn