The impact wrench is the problem. Even though it is a craftsman, it is the cheaper line that doesn't carry it's lifetime warranty.
I did a lot of research and believe it or not, the harbor freight higher line works perfectly fine for the lugs of all my cars. I believe it is the $80-90 1/2 " drive and the torque is somewhere around the 600.
Between swapping tires/brakes for track duty, and 1-2 track days per month for 10 months of the year, I use the impact wrench quite often.
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02 Boxster (DD sans kids)
03 Dodge Ram Quad Cab (Stuff hauler)
06 Maserati Coupe Cambiocorsa (Personal weekend car)
06 Maserati Quattroporte (Family hauler)
08 Corvette Z06 (Track car)
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