J 41013 Rotor Resurfacing kit
Important: Do NOT refinish the brake drums in order to correct any of the following  complaints:
   •  Brake noise (growl/squeal)    •  Premature brake lining wear    •  Cosmetic or superficial corrosion of the drum braking surface    •  Drum discoloration    •  Severe scoring of the drum braking surface (groove depth in excess  of
1.5 mm (0.059 in)    •  Brake pulsation caused by the following:       -  Brake drum out of round       -  Corrosion or pitting that is deeper than the drum braking surface 
Important: Failure to obtain the best possible braking surface finish may cause the vehicle to stop with difficulty.