Shake in front end

Ok, so recently, I've noticed a nasty shake in the front end, which only seems to get worse over time. It happens less intense when going straight, or turning right, but turning the wheel partway left, the shake becomes horrible, and eventually calms back down when turning further left. I thought it was warped rotors, and replaced them, and the pads today. Pads were horrible, replaced last only about 6 months ago, had most of the material worn off, with the outside pads being almost brand new.

Shake/vibration/banging seems to be coming from the floor, and only seems to be affecting the drivers side front wheel. Vibration also seems to be speed related, with slower, more intense before 40 mph, then calming up until 60 mph, then becoming much more intense around 60 mph and over. I used to work at a Dodge dealership around the time that this 2007 Grand Caravan was brand new, so I know that sway bar links/Tie rods, and ball joints are popular wear items, but unfortunately, I wasn't a mechanic, I was just the guy that handed out parts at the service counter.