I have a bump or pause in the auto transmission at speeds between 55 and 65 mph. It feel like almost a miss in the engine, but I'm sure that it is coming from the Trans. Like it almost goes into free float for a split second. It is most pronounce when in OD. Can anyone give me some hints on what may be the cause? Any help would be appreciated (this is my daughter's car and I have no idea what could be the problem & thanks inadvance for the help