When driving at in town speeds, we will occasionally have a vibration similar to grooved pavement before a stop sign. Are you aware of any condition that will cause that effect?

Could be a number of things. One idea to look for is loose tie rod ends. Best way to check these is to raise front of car off of ground a couple inches and using your hands grab the wheel at the 9 and 3 o clock positions and try to rock the wheel back and forth. You should get very little movement. Do this on both sides.