Like everybody else said and check to make sure the converter bolts aren`t bottoming out, i.e. too long, I had this problem that I kept cracking flex plates, turns out the bolts were one thread too long, we cut them , put loc tite on them , retightened them with an impact thru the starter hole ( Like Mr P body said) and haven`t had a problem since.
Last edited by 11secdart; 02/12/1410:33 PM.
68 Dart 410 / 904 92 D150 original owner 21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4 23 Audi Q5 16 Honda HRV