check trans fluids and the vacuum lines going to the trans, could be the kick down linkage as well.
overdrive light keeps flashing
Is there a button to activate the overdrive on the transmission. If the button is activated and not in overdrive mode the car will never shift into 4th gear.
If your engine is running , and the battery light comes on , that indicates that your battery is not being charged
So first I do not have this vehicle. In general when you see overdrive light flash or stay on, it means overdrive has been turned on. In most vehicles the overdrive button is either on the gear shifter or on the stiring colum. If you dong want or need overdrive on then just press the button. If your light stays on, then it could be something different and not so simple.
No it doesn't! Stays in auto 4 wheel
Overdrive allowed is the NORMAL position ( if I'm on the highway and have to go down a long / steep hill , I like to cancel the overdrive with the switch on the end of the gear selector so the transmission stays in drive and gives some engine braking )
Yes
a bad lock-up switch in the tranny.
my check engine light stays on and the o/d light blinks....what could this mean?
85 THUNDERBIRD KEEPS STALLING. tHE ONLY WAY IT STAYS RUNNING IS WITH A LOT OF HELP. i MUST KEEP FEATHERING THE GAS PEDAL PUMPING IN GAS i HAVE REPLACED THE THROTTLE BODY, FUEL FILTER, DROP THE GAS TANK AND WASHED IT OUT. iDEAS?
You mean OD off. That is overdrive off. If it stays on all the time, you need to have the trans computer checked for codes.
The transmission may be damaged. My wife and I had an Explorer and it did the exact same thing, and shortly after the transmission went out. Have it checked out at a reputable shop or dealer.