Question about 2003 Pontiac Grand Am
When u start drivin the car its ok but after a while the gears begin to hit
Posted by Anonymous on
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Posted on Jan 02, 2017
Does the service engine come on? there are a few thins that could cause this, i'm guessing it is an automatic, the oxygen sensor can cause an aray of problems, the tps, more than likely the transmission converter clutch solenoid valve or tps. the tps is an easy repair, the tcc is also fairly easy, on the side of your tranny there is another pan, you take that off to gain access to the tcc. you can test to see if it is the tcc by simply unplugging it. if unplugging it does not work check your tps it will definately cause this.
Posted on Jan 25, 2010
Although there a several possibilities, the most likely is that your vacuum modulator. It could be bad or the vacuum line could be disconnected. It is possible you might have another vacuum leak that is causing you to have to little vacuum to run the modulator.
Any other possiblities would require more info or even hands on to diagnose.
Posted on May 31, 2010
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