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What is causing my car to down shift on its own when it doesnt need to?

(1990 Honda Accord)
in Morehead City, NC on February 01, 2012
I just recently changed my trans fluid and for a while everything was fine. After a couple weeks it just started shifting wierd, changing gears on its own when it doesnt need to. Some time while in drive it acts like its in 4th. I have no idea what happened.
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on February 01, 2012
why did you change the fluid?? was there an issue at that point??

Roy
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on February 01, 2012
No not really. It had just been a long time since it had been changed. Everything I have read says its the transmission control module.
on February 01, 2012
could be valve body or internal. you need a trans shop to help you identify the problem.

Roy
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