why is my car shifting up and down involuntary? on 2008 Chrysler PT Cruiser

My car started shifting up and or down with out me doing it. I have checked all my fluids and there fine. When it kicks down it feels as if my engine has just dropped out from underneath my car.. Or my rpm's are wanting to get in the ranges of 3-5 b4 shifting. I thought it was transmission but it only does it occasionally. My fluids are fine.. What can this be? Please I need help on this one.

by in Xenia, IL on May 24, 2012
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1 answer
ANSWER by , May 24, 2012
scan for trans codes you may have a transmission control module or other related sensor issue. aamco will do this for free but get a 2nd est and diag