trans. stuck on 1996 Dodge Intrepid

I OWN A DODGE INTREPID 96 I TOOK OFF IN MY CAR THE OTHER DAY FOR THE FIRST SIX TO SEVEN MILES THE TRANSMISSION SHIFT FINE WHEN I CAME TO A STOP THE TRANSMISSION DID NOT SHIFT DOWN PROPERLY IT SHIFTED STRAIGHT IN TO FIRST AND STAYED IN FIRST NO MATTER WHAT I DONE I CAN LET THE CAR COOL DOWN AND IT DOES THE SAME THING EVERY TIME. I THINK IT MIGHT BE THE MODULATOR VALVE BUT I'M NOT SURE IF YOU HAVE ANY IDEA PLEASE LET ME KNOW..UPDATE-- changed TCM, doing same thing & still no chk engine light coming on.

by in Bell, FL on September 25, 2013
2 answers 2 comments
ANSWER by on September 25, 2013
Have it scan tested, possible input/output sensor(s). Speedometer working like it should?
COMMENT by on September 26, 2013
YES WORKS FINE BUT NO CHK ENGINE LIGHT COME ON OR ANYTHING JUST WON'T SHIFT AFTER ABOUT 5 MILES AND THE RPM KEEP GOING UP
COMMENT by on September 26, 2013
Light may not be on but a scanner can still monitor the trans. to see what the trouble may be. Can't guess at it, needs hands on testing.
ANSWER by on September 26, 2013
get a free diag and est from aamco then shop prices