Question about 2006 Toyota Tundra

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The Transmission Overdrive on my 2006 Toyota Tundra (4 litre/V6)does not work (does not go into final gear) . The switch appears to work as indicated on the dash light. No error codes appear.

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Just to verify you have had the computer control system for the transmission tested for fault codes? If you have and you had it done by a reputable transmission repair shop then what needs to be done is the transmission control module hooked up to a monitor and road tested to see if the transmission is being sent the the electronic command to shift into overdrive, this is essential to decide if the problem is caused by an electronic or mechanical problem, there is no magic answer to fix this type of problem. Aamco Transmission will do the testing for free in most cases, give them a try.

Posted on Mar 20, 2011

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I was researching the recalls for the 2002 tundra and havent found any recall pertaining to the 4whl drive. Sometimes when people have their 4wheel drive locked in and drive on pavement for any length of time, whether it be just a couple of feet or a couple of miles, over time it creates a binding of the gears in your transfer case. Once the bind is so great, the engaging and disengaging starts malfunctioning and leads to bigger problems overall. I could be wrong about this being the problem that you have but I think its something to look into. It wouldnt hurt to put your vehicle up off all fours and release the bind if any by running through the gears while in 2 and rour wheel drive while all four tires can move freely and release. See if that works for you. Check your gear oil front , center and rear and use much caution when attempting this suggestion. Also refer to your owners manual troubleshooting section for other possibilities. Merry Christmas. By the way, the electrical switch should be covered in the troubleshooting section also.

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I have 1987 toyota mr2 automatic with overdrive, w...

Don't listen to that guy, he doesn't know what he's talking about!! I have an 85 Celica with the very same issue. I was told it could be some kind of temperature sensor that may not be working properly. There is a sensor, I was told in the exhaust line that indicates that the car has reached operating temperature and until that sensor is tripped, it will not activate the solenoid that allows overdrive to engage, it could also be that solenoid malfunctioning, or maybe a fuse or the switch that turns on the overdrive malfunctioning.. I would check those things first before you go thinking the trans is having issues.

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