My Catera is missing horribly. At a dead stop if I tramp on it, it will hesitate then catch and go. Also around turns while letting off the gas and then driving out of a turn it will miss and then catch again. If I have my foot on the gas then let go it will momentarily get caught in another gear and then drop down to the gear it is supposed to be in with a nice thud while doing so. I NEED SOME HELP!!! took it to a trans specialist thinking it was the trans but it came back good..had the trans fluid, filter and gasket done and all types of other work still with the same problems. I am thinking it may the TCM (trans computer) or the Ujoint....but dunno. Had my Cat for 6yrs. and 130k she's my baby and I don't wanna let her go!!!!!! HELP!!