2004 Nissan Armada suspension problems

Left front wheel, tire, disk brake assembly, plus caliper and brake disk detached from vehicle while truck was traveling approx 60 MPH on rte 8 in conn. Truck spun into the median guard rail and I had to struggle to get it stopped. Inspection of the left front wheel well revealed that the tie road to that wheel assembly had completely severed itself--as if you were slicing into a cake with a knife. . We could have easily been both killed.

Purchased in 11/2003, and it was in the shop for creaking in the uni-body, and a harmonic hum when the defrost was on, along with having visors replaced. Then within a short period after that the truck reached 3000 miles and with every 3000 miles the breaks begin to pulsate and cause the steering wheel to shake making driving difficult. The first time it was brought in to the dealers for this the rotors were turned and the brake pads replaced.