hi, i'm not sure of the part name but it acts as a universal joint for the drive shaft. It's on the transmission side of the shaft and it bangs when you put it in reverse and acceleration clicks and all thiss good stuff. they told me at the dealership it was a normal wearing part at those symptoms are all normal. Well I was wondering if anybody had ever personally preformed the repair on thi and how big a job is it? Do you know what ill need as far as special tools or any parts that also shoud be replace while doing this? Maybe things need to come off to get at it? Just basically want an idea of what I am getting into. Thanks a lot!