Why would your Nissan altima 97 auto transmission be shifting gears too early?
If the 1997 Nissan Altima with an automatic transmission is shifting gears too early, it could be that the shift solenoid for the transmission is faulty. Both the shift solenoid and the speed sensor on the transmission should be checked.
A sensor has failed, and is reporting the wrong value to the transmission controller. Old transmissions: Probably the vacuum modulator or throttle position sensor. Also check the fluid level. New Transmissions: Output speed sensor, turbine speed sensor, throttle-position sensor, fluid pressure sensor, and sensors on the engine.
it electronically changes the shift points of the transmission. by shifting sooner and not letting the engine rev up so much, will save fuel. unless you drive it like a race car, then it will get the same mileage, and add wear and tear to the engine, because the trans will be shifting before the engine gets in to it's power band, and it will lug the engine, causing early bearing failure.
Why does the automatic transmission in my 1991 ford explorer make a grinding noise when i shift it into reverse.?
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