There is only drag link and one tie rod on a 4x4. The tie rod connects the two steering knuckles to turn the front wheels together. You probably do not need the whole drag link. The ends are probably worn. They can be purchased seperately. Why do you think you need a drag link? I would get a second opinion from an independent shop. A lot of dealers are not the most reliable places. Like I mentioned previously, if your truck isn't wandering or feeling loose in the front end, there's probably nothing wrong with it.