Hello all my name is Sean and I am new here down south in Louisiana I don’t have a g body but I do have a 69 cutlass with a 2004r from art Carr and that is why I am here I figured where better to ask questions on a 2004r so I just rebuilt my trans and got a new converter also filled it up with fluid and wanted to test drive I out in reverse and all was good went to put it in drive and ... car died immediately any ideas ? Valve body? Check balls in wrong place? Any help is much appreciated!