Question about 2002 Nissan Altima

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2002 altima 2.5 auto not going into overdrive it is running high

It is running high rpms and gas mileage is gone.

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Check fluid level.if all good.you could have a bad torque converter or governor problems.

Posted on May 21, 2009

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Posted on Jan 02, 2017

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1 Answer

Why wont my nissan altima shift into overdrive


run the fault codes as there may be a problem i he VSS or TCM module

Jul 18, 2017 | 2005 Nissan Altima

1 Answer

2008 Altima Coupe 2.5 won't go into overdrive


Don't know if a trans shop will work on a CVT--- we didn't
when I had my shop

May have to go to dealer

Nov 29, 2012 | 2008 Nissan Altima Coupe

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1994 nissan altima sometimes sluggish at take off, high rpms when changing gears


This sounds like a slipping transmission , check the fluid level first and make sure its full, if its full then you have ****** problems and may need to have ****** rebuild done,

Another thing is to make sure the trans passing gear cable is connected at the throttle where the gas cable is.

Sep 03, 2012 | 1994 Nissan Altima

1 Answer

Should the overdrive be on and does it affect gas mileage?


as a rule, no. many overdrives are automatic and don't engage until you reach 40- 45 mph and they do this by themselves. yes, this does affect gas mileage because the purpose of overdrive is to shift the transmission into a higher gear producing less strain on motor and ****** thereby increasing fuel mileage. conversely, if ****** is in high gear at lower speeds this increases strain (motor feels like it's lugging) reducing mileage. sounds as though you have manually selective overdrive and you will have to monitor mileage both with button pushed and without. then try pushing the button only when you reach 40-45 but you'll have to be continually conscious of the speeds at which you're driving.

Aug 27, 2012 | 2004 Jeep Wrangler

1 Answer

Just replaced 2.6 motor. everything runs fine except even though the transmission shifts properly, the rpms are too high... I think I have vacuum lines crossed somewhere. I've gone from 26 mpg to 17mpg and...


you should have a 722.2 or 722.3 transmission . Theese are 4 speed but not overdrive. The vacuum line going to modulator should be manifold vacuum , mean it is supplied directly off the intake manifold and should be 16 to 18 hg at idle and nearly zero at wide open throttle. benz loves to use nylon lines to source vacuum for different things and they get hard with heat and age and break. Nobody could remove an engine on a 20 year old benz and not break one somewhere.

Jan 15, 2011 | 1992 Mercedes-Benz Mercedes Benz 300 Class

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My 2002 trailblazer is making a noise when I go over 45 mph and appears to not be going in gear quickly at that speed


Check your transmission fluid level and/or have the fluid changed. If problem persist have a transmission professional at a dealership or transmission shop service it.

Sep 14, 2009 | 2002 Chevrolet TrailBlazer

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2001 Hyundai Accent high rpms on highway


you need to make sure your trans is shifting to high gear. if not thats why your rpm's are to high.

Jun 11, 2009 | 2001 Hyundai Accent

1 Answer

Should O/D off always light or unlight?


The light should normally be "off", by pushing the small button on the transmission shifter. For power or passing at high speed, push the button again to light "O/D off", signifying that the overdrive is off. Overdrive (O/D) is normally for cruising at highway speeds to maximize gas mileage. Having it off increases the motor RPM's, increasing power, and decreasing mileage and gas efficiency.

For most purposes turn "on" overdrive, and the light on the dash should go out.

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