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if it has never been done before don't do it , unless you have no other choise and they shop could guarantee you in writing that nothing its going to happen(which they won't). (as a tech i could tell you depending on your mileage that may couse a lot of problems to your transmission).

That's funny cause i thought my transmission was going out in my 1999 Grand prix GT and it turned out by doing a filter and complete flush it made it 1000% better almost perfect actually.

Are we talking about a flush or a fluid change? A fluid change would do alot of good but a flush may loosen much needed debris that your engine relys on for operation. Sometimes people refer to a fluid change as a flush. I would recommend a fluid change myself as I have seen the results first hand, my van and car shift like new now.

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Q: How often should transmission be flushed on 2002 Pontiac Grand Prix?
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