odd update. the bumpsteer was almost non existent today. Any ideas what might cause it to be so bad last night and by morning be gone? I understand it may have to do with the track bar? But for it to be intermittent is weird.
If your Jeep was fully loaded, the additional weight probably contributed to it.
Track bars should help bump steer since the track-bar shoves the axle over slightly in the direction that the drag-link needs to go. It's hard to explain but if you measure the distance between the drag-link and the end of the tie-rod, then measure it when the suspension is compressed and again when it is extended, you'll end up with 3 different numbers. When it compresses the length is shortened when it is lengthened when the suspension is extended. Since the drag-link cannot extend and contract, something has to give and that's why it turns.
So this is why the track bar needs to run parallel with the drag-link. As the suspension compressed, the track-bar forces the axle ever so slightly to shift so the distance between the drag-link and the tie-rod stays the same.
Now why did it all of a sudden happen when you had a fully loaded Jeep. Well that's because the springs you have are a bit stiff when no one else is in it so the suspension doesn't move nearly as much. With more weight, it loads the springs and as the weight shifts forward, it causes the suspension to sag more.
Also, bump steer depends on the speed you're going. If you're braking hard at a higher speed, the weight will shift more and you'll have exaggerated bump steer. So you hitting the speed bump at a fast speed probably contributed to it as well.
