2008 Pontiac Grand Prix Transmission issue

2008 PONTIAC GRAND PRIX
90,000 MILES • 3.8L • V6 • FWD • AUTOMATIC
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ERICWILLIAM
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I turned the car off when I got home everything was running fine then approximately fifteen minutes later I went to leave and reverse worked fine but drive and third did not work and first and second worked slipping at first until I reached approximately ten to fifteen mph then all gears worked fine as if nothing is wrong until I slow to below ten mph I checked fluid level and it was fine so I drained enough out to put Lucas transmission fix in it and nothing changed I'm hoping it's just a sensor but need to know if it is and which one please help.
Aug 8, 2015 at 11:46 AM
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SATURNTECH9
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Have you checked for codes in the computer yet?Also i dont believe in miracles in a bottle to fix transmission problems etc.
Aug 9, 2015 at 7:56 AM
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ERICWILLIAM
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No I didn't get it checked for codes but the check engine light isn't on nor is any other warning light would it still throw a code without the check engine light being on I've driven it enough to go through the drive cycle on the codes
Aug 9, 2015 at 8:00 AM
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SATURNTECH9
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Yes even without the check engine light on it could still have codes with as bad as it is i would think there would be a code.Not all of the cheap diyer code readers can read/see all the codes a car might have though.
Aug 9, 2015 at 8:26 AM
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ERICWILLIAM
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Okay I will get it checked out thank you very much and yeah it's really strange how the transmission is acting like I said once I reach fifteen to twenty mph all gears work fine and it drives like nothing is wrong but thank you for the advice
Aug 9, 2015 at 8:31 AM
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SATURNTECH9
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Your welcome let me know what codes you find the exact code numbers not code descriptions.
Aug 9, 2015 at 8:57 AM
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ERICWILLIAM
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Okay will do I'll keep you posted on all progress for future reference
Aug 9, 2015 at 9:09 AM