you probably have a button or switch to turn overdrive on and off, it may be on the end of your shift lever, you probably want to keep the overdrive on, save you some gas, hope i helped
If an automatic car is in off overdrive does it save fuel
Yes it should, its very important.
Not normally.
An over drive should enable you to save your fuel usage. It allows you to drive at the same speed, but using less revs, therefore you will use less fuel.
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!
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.
its the tps
I have a 1997 ford e 350 van with automatic transmission when the transmission shifts form 3rd gear to overdrive at about 50-55 mph it falters and bucks and I have to let off on the gas so it can pick-up speed, when I have overdrive off and put on overdrive when 3rd gear shifts to overdrive at 50-55 mph it shifts smoother but if I give too much gas again it bucks and falters till I let off gas so it can retain speed slowly.
You might have accidentally clicked the overdrive button on your gearshift. The OD off indicates that your car will not shift into overdrive. It is useful to turn your overdrive off if you need to use engine braking to drive in hilly areas. Otherwise, it just wastes gas.
When the car reaches the speed that you would like to attain (say 55 MPH) and levels off (stays at 55 MPH) the engine does not require as much gas as when you are getting up to speed (0 - 54 MPH). So considering this, Overdrive is when you get up to speed and the amount of gas put into the chambers is reduced, (but you still continue at 55 MPH) saving tons of gas and is easier on your engine. The overdrive on/off switch controls the transmission. If overdrive is off (indicated by light on dash) vehicle will not shift into overdriven gear (4th gear); which can be useful for mountain driving. Overdrive should be on though as it will greatly effect your gas milage if it is off.
the overdrive is used to save gas. it is an additional gear after your final gear in the transmission. this gear usually kicks in at higher speeds (maybe 50+). you will notice the tach drop down about 500 rpm's as the vehicle kicks into overdrive. it does not make your car go faster or slower. you will not have be able to accelerate as fast in overdrive as you will in other gears. if it is an automatic overdrive then as you slow down the overdrive will automatically be taken off.