It may have been a sticky shift solenoid. However, you did the best thing. Changing the fluid and filter can remove contamination making the solenoid stick. So, you may find that the problem clears up just fine.
If you do run into trouble, pull the trouble codes. Advance Auto or Auto Zone will do this for free.
If you have to get further diagnostics or repair, take it to a transmission shop as opposed to a standard repair facility. Automatic transmissions are hard to work on and take special expertise and tools. If you need a transmission shop near you, use the search feature on this site and shops near you will be in the text and banner ads on the page.
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Saturday, August 17th, 2013 AT 5:47 PM