Toyota had a similar issue 15 years ago. Swapped to plastic fuel tanks (former Ford supplier) that leaked if filled full. Had to side line ~20,000 brand new Sienna mini vans in the corn fields around the plant waiting for new fuel tanks. And then a nice little summer thunder storm came thru with golf ball to tennis ball sized hail. 2,000-3,000 new Sienna's no longer needed new fuel tanks. ... Same type of weather patterns over KY Speed Way. Fingers crossed that we are past the hail storms...