Transmission on 2003
 

My 2003 seems to have the beginnings of transmission problems. While it is not slipping, it does seem to "bump" from time to time. Sorry, but that's the best explanation I have. The repair shop just changed the transmission fluid, and that did not help. They also said that there are no adjustments on the transmission.

If I am, in fact, having transmission problems, do I have this one rebuilt, or do I get a new one? The car only has 70,000 miles, and it has been under dealer care (by the original owner) since new.