Just put in in OD and forget it. Unless you are towing a load.
If it has overdrive use it! it is a "highway gear" it will make no difference what so ever until you get up to speed then it will shift into overdrive and save you gas!
Certainly. It's been done for years before overdrive became a thing... it just means you'll turn higher RPMs at speed, and you'll want to drive slower if you're conscious about fuel consumption. I had no problems when I took my 87 Silverado with a Muncie 465 direct drive transmission on the highway.
Overdrive is the normally allowed position , but it won't shift into overdrive until the speed is faster such as on the highway / freeway
I would like to add that if you drive in the 40 to 50 mph range, don't use overdrive. The transmission will shift back and forth too much eventually causing problems with the transmission and drive train. If you have a shift indicator that has both the letters D and 3, use 3 in this type of speed range. D usually indicates a higher or highway gear setting. When cruising on a 4 lane highway, the transmission does not have to shift very often.
you should never tow in overdrive. that will kill your transmission. tow in regular drive or 3
The D with a circle will allow the transmission to shift into overdrive which reduces engine RPM"S and will conserve fuel when on a highway cruise. The D without a circle will not let overdrive engage. this is useful when traveling on hilly terrain where overdrive tends to engage and disengage. I usually drive in the circle mode unless i am climbing uphill and the transmission keeps downshifting and upshifting. Rule of thumb: Circle D on the highway, and plain D in the city
The button does not switch from Overdrive to Automatic. The button just turns the overdrive off. Overdrive is not a separate drive system as your question implies. Normally you leave the car in overdrive mode. That way the transmission shifts into overdrive at highway speeds, thus saving fuel. If you are saying the transmission is stuck in overdrive and it will not disengage then seek out a A/T professional.
On a 1999 Ford Expedition : Overdrive is the normally allowed position It won't shift into overdrive ( the 4th " gear " of the transmission ) until the speed is higher anyway ( such as on a highway / freeway ) If you are towing something / or driving in hilly country and the transmission is shifting back and forth between overdrive and drive , then you want to shut off the overdrive on the transmission using the switch on the end of the gear selector lever . ( the word OFF will light up near the end of the gear selector lever )
Neither. Racing is almost always in manual transmission.
Overdrive is the normally allowed position . It won't shift into overdrive until the speed is higher anyway , such as on the highway / freeway
Overdrive. The "O" in "RTLO" indicates that, and the transmission in question has a final drive ratio of .73.
If its a light load, if it will be frequently used its worth getting a transmssion cooler to save the trannys life. Its also a good idea when towing to drive with the over drive turned off. Overdrive isn't meant to handle a load, just to freewheel to save gas on the highway. Towing a load with the overdrive on can burn out the overdrive.