This is for a 2000 Sport 4x4 1500 . I have been told by my mechanic that this is worn out and the cause of the rough ride over washboard / pothole surfaces . Does anyone know of a good place to shop for a new one ? Can I go to a heavier duty one ...say 1 ton ? Is this a difficult repair .....I have a 3 ton jack and the tools ....somewhat of a shadetree mechanic ! Thanks for any suggestions .