hello all this is my first time and i hate to ask for help but,i`m loosing my patience with this car..2004 base model..here is the problem..when i drive this car it seems to shift at the wrong times...when it`s going thru the gears it seems that when your doing 30mph it seems to go into 5th then if you slow up it may or may-not downshift at the right speed and when it goes into say 4th or 5th it feels like its way to soon like to soon to be there in that gear..i took the car to the trans shop and he plugged in only to tell me it wasn`t communicating between the tcm and trans and he thinks that's what causing this issue...can anyone PLEASE help....