so a tune should fix it right up correct?
No a tune will not fix it as a matter of fact when i had this problem getting the AT dailed in was impossible because of the incorrect usage of shift solenoids for the gears that were the issues. Hence why TSB-11-11-11 is needed. After the TSB was performed and the correct solenoids where installed tuning the transmission shifts etc was spot on.
Think about it this way if your engine timing was off because you had a bad crank position sensor tuning your car would not fix this because there is a hardware issue pre-existing that needs to be squared away for tuning to have a positive impact.