The car goes from V8 to V4 and the you think you are experiencing road vibration

you notice when it shifts back into V8 it goes away

So with the radio off you notice the engine shuttering

it stars out at 60 plus miles per hour initially

After you drive awhile it spans from 35 mph to 80 mph

it is most pronounced at around 65 mph

you take it the dealer and they advise that GM requires an oil flush of the transmission and you must put 200 to 500 miles on the vehicle before they can go further

You get the car back and take a highway trip

At 65 mph the shutter is still present

about 200 miles later it still exhibits the problem

Apparently too much engine for the standard torque converter or transmission sine the vehicle has about 6 hp below a vette

i have a 2016 Stingray and when it shifts from V8 to V4 you get a small shutter that goes away. This is nothing like the Camaro SS 2016 limited edition model shuttering problems