Noticed a vibration on the drivers side front end of vehicle it would increase with speed and when turning. I took the Vehicle into a garage and they told me what the problem was. This type of unit is one solid encased unit so which means it needs to be replaced as a whole unit. I was able to get the unit through a wrecker and took about 5 hours to remove the defective one and replace it. About 1 year later the right unit had did the same thing and now has to be replaced. (I have never herd of this problem before)