It is not recommended to pull a trailer with automatic trans in overdrive, put in drive only. When attempting to pull without locking out overdrive, trans will continue to shift from drive to 0verdrive causing a massive heat buildup. Heat is not good for automatic transmissions, and will eventually cause failure, causing your wallet a very bad day!
The overdrive is before the drive because as you ordinarly drive down the road your car automaticaly goes into overdive when you reach a certain speed. You use drive only when you are pulling a trailer or going up a large hill so it won't go into overdrive and put undo work on the transmission or motor. It is also a gas saving factor.
The light will flash if the vehicle senses that you should be in overdrive (based on speed) but aren't. There should be a button on the end of your gearshift lever to turn overdrive back on. The only time you should turn that off is, for example, if you are pulling a trailer in the mountains. Turn OD back on and the light will stop flashing. If it doesn't stop then there is a problem with the transmission going into overdrive.
how much for going 70 mph while pulling trailer
The overdrive should be switched off when you want to avoid unneccessary shifting. If you are driving on a hilly road, the vehicle will shift out of overdrive going uphill to maintain speed while pulling the vehicles weight up the hill, and shift into overdrive going down the hill to save fuel when additional engine power is not needed. When towing with an automatic transmission, the vehicle may tend to repeatedly shift in and out of overdrive due to the added weight. In scenerios such as these, you should turn off the overdrive to avoid the unneccesary shifting which puts more wear and tear on the transmission.
If you don't want the transmission to shift into overdrive ( such as when towing a trailer , or driving in hilly country where the transmission is constantly shifting between drive and overdrive ) push the button on the end of the gearsfift selector ( P R N etcetera ) and the O/D OFF light will appear in your dash . Overdrive is the normally allowed position , but on my 1995 Ford Explorer doesn't shift into overdrive until I'm going around 50 Miles Per Hour
Only leave the overdrive on when you are towing a trailer, or if your mountaineer is fully loaded down, or lastly if you are going up a very steep hill. You will know when to use it. If the transmission constantly shifts from the overdrive gear, down, and then back, that is the time to use it. I used mine continuously when towing a loaded down 6x10 trailer through the mountains. ----------------------------------------------------------------------------------------------- Overdrive is the NORMALLY ALLOWED POSITION , he is referring to the O/D OFF light that appears in the dash when the overdrive is off You DON'T want the transmission shifting into overdrive when you are towing , etcetera so you would see the O/D OFF light in your dash Helpfull
why does the 1991 Lincoln towncars transmission not have overdrive?Instead of going into overdrive it seems to go into neutral.But if you take it out of overdrive and leave it in drive it never goes into neutral while I'm driving.
Could be low fluid,a bad sensor or transmission going bad.
if their is no slipping or any other transmission issues and it is just only the loss of overdrive try replacing the brake light switch
There are many possible meanings to the word overdrive. Many people use the word overdrive to mean going beyond normal. As far as automotive terms go, overdrive simply means that the transmission output shaft spins at a faster rate than the input shaft. So, for example, if a transmission had a .70 overdrive ratio, then the transmission output would spin one full turn for every .70 turns of the input shaft.
Overdrive is for highway driving, which is great for gas mileage. Also, not to use overdrive when going up or down hills because it makes your transmission work harder. That's what I was told anyways.
The transmission is on its way out.You could drive the vehicle with the overdrive function turned off to buy some time.