its a ati convertor i have never had this problem before seemed to do it in one pass at the track on motor no no2 ?? same convertor and combo for 7 years i fresend the trans and motor 1 1/2 years ago rick it ahs a geardrive on it witha cam button all looked good there, i will send the covertor back ive had it for 10 yrs its a ATI blown fuel convertor and i will take the trans apart again to ck it thanks for all the in put