If you have space between the converter bolt lugs and the flex plate and DON"T use spacers to fill that gap it will pull the converter forward up agianst the crankshaft Probally causing your problem The converter should not be held against the converter with any tension onto the flex plate I have had to use harden head bolt washers bewtween the flexplate and the converter lugs to avoid prelaoding tension from the converter to the crankshaft, cheap imported cranksahfts I'm guilty of using them