New Owner 2012 Sonic -AT issue

[kklblue]

We purchased a 2012 Sonic from the dealership 15 days ago. While out driving we are noticing this:

When its warm and not just started, when you accelerate from a stop sign or light when you get to 15 to 22 MPH it slips and doesn't want to go into next gear.

Immediately brought to dealership. No check engine, no codes, it did do it for technician.

They topped off the fluid and called it good. Said its the transmission relearning driving because of different driver. Its still doing this. It did not do this when we test drove it. Only does it when the car has been running for a while.

I have read about all the issues and now am worried. Suggestions. I was not seeing an answer on the other posts.

Thanks,

Kris

 

[Natesriv]

Take it back to them...if you can capture some video of it on your phone do that so they can see what's going on.

Ain't a damned tranny in God's creation which "learns" between drivers. When you drive it should be in a normal rev range. When you press the gas it should downshift (if you've pressed it far enough) to a lower gear and the revs should rise.

Slipping in a tranny isn't normal....period....

 

[Chevrolet Customer Care]

We purchased a 2012 Sonic from the dealership 15 days ago. While out driving we are noticing this:

When its warm and not just started, when you accelerate from a stop sign or light when you get to 15 to 22 MPH it slips and doesn't want to go into next gear.

Immediately brought to dealership. No check engine, no codes, it did do it for technician.

They topped off the fluid and called it good. Said its the transmission relearning driving because of different driver. Its still doing this. It did not do this when we test drove it. Only does it when the car has been running for a while.

I have read about all the issues and now am worried. Suggestions. I was not seeing an answer on the other posts.

Thanks,

Kris

Hello Kris,

We're sorry to hear about the unexpected concerns you've encountered with your Sonic. We would more than happy to touch base with your dealer for clarification and do what we can to help. We're available via direct message and will need your VIN, mileage, contact information, and dealer name to move forward.

To learn more about GM's privacy policy, please visit Privacy Statement | GM.com

Jasmine
Chevrolet Customer Care

 

[kklblue]

Sent you a PM. Since my last post it hasn't shifted into 3rd gear 3 times. The dealership still says they can't find a problem.

Clearly something is wrong.

Thanks,

Kris

 

[Chevrolet Customer Care]

We certainly understand your frustration, Kris. We have received your message and will be responding shortly. Thank you for your patience.
Netty J.
Chevrolet Customer Care

Sent you a PM. Since my last post it hasn't shifted into 3rd gear 3 times. The dealership still says they can't find a problem.

Clearly something is wrong.

Thanks,

Kris

 

[kklblue]

Car is being towed into dealership. It does not go over 10 mph.

at 23 mph the rpms go to 3500. Dealership is still dragging their feet. Oh it could be low on fluid.

Sending you another PM

 

[Blue Moon Sonic]

Wonder if it's the transmissions fluid pump that's gone out on it. These 6T40 transmissions have a tendency to be problematic and temperamental I've noticed.