Q: RPM goes up but it doesnt let me go above 20mph. overdrive light was flashing and it displayed "TRANS FAULT."

asked by on April 22, 2017

Yesterday the O/D light was blinking and it was displaying "TRANS FAULT" , today my truck wouldn't go above 10-20mph but the RPM would keep on going up while it stayed at 10-20mph. it stays like that but will drive normal for like a minute then it'll go back to the problem.

My car has 1236850 miles.
My car has an automatic transmission.

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