it's not just the cheap shift kits , the 727 and the 904 have overlap by design , chrysler has a stock trans setup just on the hairy edge so you do not feel it , but it's there . when you start chaging fluid pressure and springs you change the overlap from stock , some kits handle it better than others .
as far as removing the accum spring and blocking the it , i have done it and I can tell you that a teeth rattling shift does not mean it's a GOOD shift . I don't do it anymore .
