Do I have an engine transmission issue? Warranty covered?

[SparklerHI 0]

Hi Spark Family!

 

I'm the new owner of a 2015 Chevy Spark LT. Honestly, I love nearly all parts of the car but i'm having one concern. When I step on the gas and it accelerates in the 10 mile to 30 mile speed range, the vehicle gets a little shaky. I don't really know how to diagnose the problem but a friend said it could be the transmission not shifting properly. It's more of a back and forth shaking and it sometimes feels like its trying to brake when i'm not braking. Once I get passed 30, it drives like a beauty.

 

The dealership I bought it from has a 30-day, 1,000 mile powertrain warranty and i'm still within that. Does this sound like something that could be remedied through that warranty?