I bet my money on Improper Torque on th lugs...
i was having that problem, till I retorqued mine to 90lbs.


99 SVT Black/Tan #1311/2760 Born 3/2/99 17x7.5 Momo Racers-225/45/17 Falken ZE-512's Loud Beats,KKM,Bullet Fuel door,Fog Fix & 885's,9005 Silverstars,body color matched oval, RichBrook CF Knob.