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Vibration and feels like it is sputtering hesitating

Tiny
STEPHEN LYNAS
  • MEMBER
  • 2012 GMC ACADIA
  • 0.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
When I’m doing anywhere from 25 mph to35 mph and around 55 mph to 70 mph my vehicle has a vibration and feels like it’s sputtering hesitating, but if you let off gas pedal or give it a little pedal it goes away. You can see the tachometer start to jump a little but not much, I’d say 500 800 rpm's. Does it as well when going up a incline. There’s no codes or misfires. Can someone please help?
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Friday, December 13th, 2019 AT 2:32 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Sounds like you have a torque converter shutter. That is when the clutches slip in the torque converter under a load.

To confirm, you can go to a parts store and get the additive for the shutter. Add it to the transmission and drive it. It should take effect in about 10-15 miles. If that stops it, the torque converter is bad and must be replaced. If it does not stop it then we need to look elsewhere.

Roy
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Friday, December 13th, 2019 AT 2:55 AM

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