Did Ford change clutch settings in diff to accomodate stability control? I had 2005 GT with usual minor mods (+ 3.73 gears), and had no problem with one wheel spinning (13.2 1/4 mi). On one launch (slight brake torque) I had one wheel spin for 100+ feet (yes I know I should have let off gas, but that's not the point) which wouldn't have happened with "05 GT. As info, I have auto trans.