Won't shift into overdrive when button pushed

If all is working well with the transmission. when you push the button and the light comes on, you should feel a down shift at higher speeds. the 3D light would come on. You are at that point out of overdrive. Pushing the button again, you would feel it going into to overdrive. This is normal

Does the car have a button on the shifter handle somewhere to disable overdrive? Also, there is a plug on the transmission that must be plugged in to engage overdrive so check to make sure it is plugged in correctly.

Rock the car back and forth to remove parking pin from park .

If it is flashing then it is a malfunction indicator. Think of it as a "check transmission light." It could be anything from a loose connection in the shifter to a bad transmission. How does it drive? Is it shifting into overdrive?

hello subir. This is the over drive function. someone may have accidentally pushed this button so to turn it off you will have to find it and push it again. there is a Overdrive button somewhere on the shifter. It is probably on the side of the actual handle or down near the 4-speed gear numbers, sometimes even in the end of the shifter..

O/D off is NOT a big problem at all- you just don't want to use it all of the time because it runs your engine a lot harder because you are always in a lower gear. That would be used if you were driving up a big hill, for example, and don't want it staying in the highest gear. It gives you more power in circumstances like that

There is an overdrive bypass switch on the end of the shift lever on some, Push the button on the end of the shifter. It is easy to overlook, as it is on the very end of the shift lever, and can be inadvertently switched off when you shift to park. Hope this solves your problem

It seems like your "2nd start" button is turned on. The 80 series LC has a button next to the shifter which allows it to start in 2nd gear. If the button is not engaged then there could be a problem with the circuit, but that is not common

If you have it in 4 LOW, you would never need overdrive. Overdrive is a road high gear that you would use only in 4 HIGH (or 4H) on your shifter. 4L (or 4 Low) would only be used in a very slow speed hill climb. You would NEVER use 4 Low on the road.

sorry to say this trans has to be removed and rebuilt seems like od clutches burnt out-do you tow heavy trailer with truck as you have to tow with od off(push button on shifter)

The ETC switch is a transmission control device. When it is not active, the transmissions shifts normally. When the ETC is engaged, it alters the shift points.
Example: the 1-2 upshift occurs normally between 18-20 mph. Now, say you are towing something, or are carrying a heavy load...engage the ETC, and the trans computer will "hold" the 1-2 upshift until 22-24 mph. It is just for that, prolonging the shift points, due to load.

The switch on the side of the shifter is for the Overdrive. Engaged (the OD light is off) the transmission shifts into overdrive. This saves you gas. When the button is dis-engaged (the OD OFF light is on) , the transmission does NOT shift into overdrive. It is best to leave the overdrive ON, and the ECT OFF to obtain maximum fuel mileage. I hope this has answered your question. Please feel free to comment back if you have any other questions. Thanks for chosing FixYa for assistance.