transmission fluid overfilled

2006 PONTIAC GRAND PRIX
133,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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OMARM
  • MEMBER
  • 1 POST
i had mechanic change transmission fluid and the next day stated slipping a bit. checked stick and over filled. I called, he put two gallons of fluid it. so it is over filled. is this causing the slip? please need advise. owners manuel sais 7.4 quarts. so he overfilled by a lot. need advise. thank you
Feb 28, 2017 at 6:20 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
probably not causing the slipping, but filter may have not been put in all the way so it is not getting good supply. drain out and pull pan and check to make sure not two o-rings in where filter goes into valve body. then put one on and make sure filter is in all the way. there will be a screw holding it in or should be or a clip.
Feb 28, 2017 at 8:16 AM
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