Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is***** for the question. Most of the time this is caused by a failing transmission speed sensor. If the computer sees no or an incorrect speed signal then the vehicle will act like this. It can also be a failure in the transmission control module but that is not as common. Please let me know if you need more help.
Does the speedometer still act up when this occurs? If it does then it may be a module problem. Did they happen to tell you how the fluid looked when it came out? If it was really dark or smelled burnt then the transmission may be failing.
Does the transmission only act fine when the speedometer is acting fine?
Thanks. Since the sensor was replaced and he signal is still acting up either there is a wiring issue from the sensor or the transmission control module is failing. Most of the time it is the module.
They should have checked the tone ring in the transmission for signs of metal when they changed the sensor. You may want to verify this with them.