So, I was investigating a small rattle near the exhaust today, and noticed a bolt showing about 1/4 inch thread. Well, long story short all 8 of the drive shaft bolts (both sides) were loose- 3 of which weren't threaded in at all. My guess is when the boots were replaced the mechanics failed to torque these bolts. I'm lucky my investigation was so successful and besides a nice ring of grease inside the fender, no damage!
Whew!
Kyle