Question about Transmission & Drivetrain for Toyota Corolla

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Automatic transmission shifts to overdrive at 41 mph, higher if accelerating heavier.

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That is normally the range that overdrive kicks in at.

Posted on Mar 31, 2015

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What is over drive for?


Overdrive is used for fuel economy. Normally, the highest gear on a vehicle has the engine-to-transmission ratio at 1:1, meaning for each revolution of the engine, you get one revolution of the driveshaft. This normally provides best fuel economy. To improve on this, overdrive actually gears even higher than 1:1, meaning that you get a bit more than one revolution of the driveshaft for each revolution of the engine. This can improve fuel mileage, but also has risks - the engine can easily bog down under heavier load conditions or on inclines. Most vehicles that used O/D, one you shift into it, use it when the engine load allows for it, and will automatically shift down to the normal Drive range when needed.

Sep 15, 2016 | 2003 Ford Explorer

1 Answer

How many times does a transmission supposed to shift starting from drive in a 1988 dodge ram with a 318 motor


Depends if you have a regular 3 speed automatic, or a 3 speed with overdrive.
Put it in drive, it will start out in first gear, then shift into second at about 15 MPH, into third at about 30-35 MPH. With overdrive, fourth gear will kick in at about 45-55MPH.

Oct 07, 2013 | Cars & Trucks

2 Answers

What is the o/d button on top of automatic gear stick for please


Over Drive..... Generally speaking, overdrive (OD) is the highest gear in the transmission. Overdrive allows the engine to operate at a lower rpm for a given road speed. This allows the vehicle to achieve better fuel efficiency, and often quieter operation on the highway. When it is switched on, an automatic transmission can shift into overdrive mode after a certain speed is reached (usually 70+ km/h [43+ mph] depending on the load). When it is off, the automatic transmission shifting is limited to the lower gears. For an automatic transmission, it is almost always best to select overdrive and allow the transmission to control engagement of the overdrive. (It may be necessary to switch it off if the vehicle is being operated in a mountainous area or when towing a trailer.) With a manual transmission, overdrive should usually be selected when the average speed is above 70 km/h (approx. 43 mph).

Feb 08, 2011 | 2003 Honda CR-V

1 Answer

I HAVE 1999 DODGE TRUCK. TRANSMISSION IS AUTOMATIC IT WANT TO SHIFT UP AND DOWN AT SPEEDS OF 45 TO 55 MPH WITH OVERDRIVE IN AND SPEEDS OF 30 TO 35 MPH WITH OVERDRIVE OUT


Sounds like dirt in the transmission may be causing the shift points to not work properly.
Is this the problem you are having?
If it is, then I would say that one should have the fluid changed out of the transmission at a local shop.

If this does not solve the problem, then the solution may be a rebuild of the transmission.

Oct 07, 2010 | 1999 Dodge Ram

1 Answer

1991 Volvo 240 has problem with automatic transmission not being able to shift to higher gear. Previously, orange overdrive arrow would stick or flash, and overdrive would intermittently engage and...


What is happening is the tranny is going. They can try to replace the selenoid, but really, you need a rebuild. Whomever charged you to remove the light, probably messed things up more. Volvo's typically lose overdrive before losing all the other gears. It is time for a rebuild. Go to a reputable tranny shop who knows volvos.

Jul 31, 2010 | 1991 Volvo 240

1 Answer

F150 transmission neutralizes when shifts to overdrive


I have that exact same truck and transmission and My Transmission did the exact same thing about a year ago and there was some kind of snap ring inside the transmission that broke. I originally thought it had to be an electirical problem because the truck shifted fine until OD or if i turned OD off. The 4r70w is a light transmission and i would suggest you have a shift kit put in and they make a heavier kit to beef it up.. Sorry its probably not the new you were looking for.

Apr 06, 2009 | 2004 Ford F150

1 Answer

Overdrive factors


When the car is just cruising along at approx.50+ MPH push the O/D button. You should feel the gears change higher and if you have an RPM guage then it should drop as well to fewer RPMs. This would be normal driving conditions. O/D will not kick in until the last regular gear (3rd or 4th depending on model)  had been shifted into. O/D automatically kicks out when slowing down and the transmission shifts to a lower gear. Thus the O/D has no function at slower speeds/gears and does not need to be shifted ( on or off ) except in the very first example given here.

Feb 26, 2009 | 1993 Toyota Corolla

1 Answer

1989 lincoln mark vll automatic transmission


you may have damaged the overdrive gear, a local transmission shop would be your best bet. for good troubleshoting and estimate.

Nov 10, 2008 | 1989 Lincoln Mark VII

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