This problem just started @ 110,000 miles and is very intermitant. When the Overdrive cuts off, most of the time the Transmission Over temp. light cuts on also. It is not overheating as it does it mostly in the mornings after start up.
After running a while both lights cut off and normal operation resumes
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Re: Overdrive cuts off buy itself while driving
When the transmission overheat light (this is for the fluid) comes on the transmission control module pulls the trans out of OD to try and cool it down, this is called failure mode strategy, it is built into the programming of the control module, the signal from the trans is most likely incorrect, but the module doesn't know that, replace the transmission fluid temperature sensor.
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Check transmission fluid level. Is there a manual Overdrive engagement button? If so you probably have a worn out wire from the switch to overdrive solenoid. I had a similar problem different car. Solution was the "spiral plastic" wire cover to cover the opening on the control wire and easy to get on the wire without having to cut and rejoin wires. Was supposed to be temporary but has lasted about 5 years. This may also be the issue with the Temp warning light. The wires may be parallel to each other. Hope this helps, good luck.
Jesse A Shelby, my best guess is the
(transmission control module) you said check engine light is on that means codes are being stored , OBD needs to be scaned that's a start. (interesting name).
Hi, apparently something in your transmission its causing the speed sensor to go bad. Once you replaced it it ran good for a month. I will check the following
1) transmission oil level
2) check overdrive sensor
3) and then i will take it to a transmission shop
hope i helped thanks
sound to me like it maybe a faulty sensor in the transmission. take your car to someone with an ODB reader and see if a transmission fault is indicated. you may have to take your car to a transmission shop.
The transmission/computer is designed not to go into overdrive until it reaches a certain temp and I don't remember what the temp is. Mine does same thing and it has 250,000 miles on it. When you start your truck up do you start it and warm up in neutral? The transmission fluid won't flow unless it is. There is know way to force it to shift into overdrive until it warms to the set temp.
If your overdrive light is flashing and the transmission is not shifting properly, you most likely have diagnostic codes stored in the tranmission control module. These codes relate to a specific sensor/solenoid/actuator and can help in diagnosing your problem. You will need a scan tool to read these codes. You should also check your transmission fluid level to see if it is at recommended level (engine at normal operating temp). The fluid should be red in color, if it is very dark or brown/black in color and has a burnt smell to it, your transmission has internal damage and will need to overhauled.
A qualified transmission shop (Aamco, Lee Miles, Gibralter, etc.) would be your best bet.