[neon_rt]

When you say you "replaced" the trans, did you get a used one from the junkyard or did you get a certified new/rebuilt one with a warranty?

Also, these transmissions require a special fluid (MOPAR ATF+ series) is there a chance that it has the wrong fluid in it? Before you say "no, I had it done at a trans shop", I will say that a lot of trans shops put the wrong fluid in them in the first place so you can bring back the trans in a year or so for a rebuild. It seems to be a trend that we all have experience with here.

Because these transmissions are computer controled with solenoids instead of mechanical control. The computer keeps a record of the transmission parameters so it can maintain shift quality and proper operation as the transmission ages/wears out. This is why these transmissions don't feel like they are getting wore out until they suddenly fail. This has the drawback in that if you change or rebuild the transmission, you need to have the trans controler "flashed" and parameters reset to zero. Then you are supposed to go thru a "rapid learn" procedure to adapt the controller to the trans without ruining the trans. If you don't follow the procedure, you may actually damage a good transmission before the computer can adapt on it's own. Some people go through trans after trans, never again does their vehicle become dependable, because they don't understand the factors involved.