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What does the Overdrive Cancel and Grade Assist light mean on the dash?
If your car is equipped with it, the Overdrive Cancel and Grade Assist system is designed to help with driving on steep grades and in other treacherous conditions. If the light is on in your dash, it means that the...
What does it mean if the Overdrive Cancel Light is on in the dash?
Your car’s transmission is equipped with an overdrive gear that’s used for normal highway driving (at speed). However, you can turn overdrive off by pressing the button on the gearshift. This will turn off overdrive and turn on the grade...
Transmission not shifting into overdrive
Hello. If the transmission is shifting fine but will not go into overdrive, then it may have a solenoid failure or a pressure problem. A bad brake light switch can also cause this. I would typically start by checking to...
Overdrive not working.
It sounds like you are having an electrical problem that is affecting several systems. These can be tricky to diagnose. Sometimes they can be tied together and fixed with a single repair or several different repairs may need to be...
Overdrive not working
Greetings! You have a 4T65E transmission. A transmission used in the Pontiac Montana and Pontiac Aztek by GM for about 10 years. About 4 years into production they started receiving complaints about no overdrive and no fourth gear. It was...
transmission problems?
You will need to have the transmission diagnosed and tested for leaking valve body or solenoid for the OD (overdrive). A pressure test by a qualified transmission mechanic should detect what is leaking or bad in your situation. Most problems...
The transmission sometimes doesn't want to shift into overdrive .
Hi there. There are several potential reasons why the transmission on your 2002 Town & Country does not shift into overdrive. This could be caused by low transmission fluid, a blockage in the transmission lines, or a transmission sensor. The...
Will a bad wheel bearing cause a transmission not shift into overdrive
Hi there. Yes, a bad wheel bearing can impact the complete operation of your vehicle. When a wheel bearing goes bad, it is due to a lack of lubrication inside the bearing. This creates metal-to-metal contact, increased friction, and can...
Not shifting into overdrive
This transmission is electronically shifted. Possible causes of no overdrive include a faulty transmission range switch, valve body, faulty overdrive brake, or faulty ECM. Faults codes should be read out with a scanner, and statuses read. You may want to...
Cannot shift into overdrive
On the SC300, when the shifter is in the 3-D position if the shifter is to the right, then the over shift function is enabled. Once the engine reaches a combination of speed and load the transmission will automatically shift...
Transmission falling out of high gear
Hi there, thanks for writing in about your 2004 Ford F-150. Check the transmission fluid level. Changing the fluid filter may help temporarily but it sounds like the clutch packs in your transmission may be worn to the point of...
Missing during idling
Hello. It sounds like the spark plugs, spark plug wires, and coil packs need to be replaced. The mileage on the truck indicates that it is due for a tune-up and the coolant and transmission fluid should be serviced, if...
Is it a 4 speed or 5 speed?
Hello. Thanks for writing in about your Mazda Protege5. Your 5th speed is known as overdrive. Manual shift does not use overdrive. This is normal operation.
Advice on using the overdrive switch on a 2001 Ford Mustang
Your transmission has an automatic overdrive. When you are going fast on a highway, it shifts into overdrive, which lowers the engine's RPM so you get better gas mileage. However, if you are towing a lot of weight you don't...
Over drive shuts off on interstate after 15miles
Your overdrive uses a lock up converter that is supposed to lock the transmission input shaft to the engine so there is not slippage. You are not supposed to tow or carry heavy loads with the transmission in overdrive. You...
Overdrive won't engage when going uphill, revs high
Hello. If the problem comes and goes it may be one of the shift solenoids. It is common for these to fail and have problems causing them to stick which will cause this. I typically start by checking the computer...
Is it safe to drive with overdrive on or overdrive off?
Hi, thanks for your question. This is usually dependent on your driving conditions and habits. Overdrive is an extra higher gear in your transmission designed to increase fuel economy and drivability in freeway or long steady drive conditions. This does...
Whining during acceleration with high RPMs, in lower gears and overdrive
I agree with the mechanic that checked it. It needs to have the transmission overhauled. I cannot make the decision if you should get it done or not, since it is a very expensive repair and may exceed the value...
Won't shift out of second gear - 2000 GMC Sierra 2500
Hello. This definitely sounds like an electronic transmission control issue. It could be something as simple as a transmission range selection switch or something as serious as a transmission valve body. You may want to consult with a transmission shop...
What does it mean to have the O/D OFF light on
When the O/D off light is on this means the overdrive gear is turned off and the torque converter will not lock up. This setting will help if you are towing something behind the vehicle. When the light is off...

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