Question about 2006 Pontiac Grand Prix

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My 2006 pontaic grand prix begins to shift very hard after a long drive (over 50miles) What could be the problem. I checked the fluid and it appears to be clean and full.

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It sounds like the coils on your TCC (Torque Converter Lock-up) are starting to wear out. The TCC solenoid is a common problem with the GM Transmissions. They normally start to show signs of wear around 75,000 miles but I have seen them go bad as soon as 32,000 in high temperature areas.

One of the best things you can do with your Transmission is to add an External Transmission cooler. This will extend the life of your transmission by YEARS,,,

Posted on May 26, 2011


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Hi and welcome to FixYa!
The automatic transmission fluid really needs to be replaced for it to go back in it's normal operation. It's not major don't worry.

Hope this helps and thank you for using FixYa! Have a good one!

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