Vibration and feels like it is sputtering hesitating

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?

Friday, December 13th, 2019 AT 2:32 AM

1 Reply

ASEMASTER6371

MECHANIC
52,796 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