Fucked up tire maybe? Just because you cannot get it to wiggle while jacked does not necessarily mean it is ok. The amount of force you can create is little to what the weight of the car does. Also certain components may not show play unless there is the weight of the car on it. Jack up the suspect corner, place a stand under the lower control arms so as to replicate the angle and weight placed on the components and again try to see if you can get play in the tie rods, steering, or ball joints.

There are only so many parts of the suspension system. Be systematic and narrow it down.