I was on a roll replacing the UCA's. Thanks to all of those that recommended the 18mm wrench, it makes life very easy. Anyways, I was pretty much finishing up, about to try to bolt the passengers side UCA to the fender, when I couldn't move the UCA. The balljoint is not moving at all. I put in on a work table and managed to make it move but with a lot of force. The drivers side UCA moved with ease, but this one is stuck. Is this a defective unit? or does it need more grease?