"Lumpy" Steering on 1970 Dart Swinger

Was the problem not there before servicing the signal switch? I can't imagine replacing the signal switch or a little lengthwise movement in the column shaft causing this. Then again, As the steering gear wears the upper shaft will develop lengthwise movement. It will move in and out through the seal with rotation direction change. So if the shaft is moving out and if the column was bolted back low in its slotted mounts, maybe something is jambing up. The box coupling has a little movement in it by design but you might be bolted tight to the bottom of that. I'm just guessing there is more wrong that just a failed lower seal.