Why does my auto trans upshift VERY HARD when car is hot? on 1998 Mercury Mystique

2.5L V6,auto trans, LS

by in Gainesville, FL on September 13, 2011
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1 answer
ANSWER by , September 13, 2011
It sounds like it may be an electrical problem but more information is needed. Please scan the vehicle and tell me the code(s) that it shows.