I have a Cobb rmm and my first gear is as quiet and smooth as the others. When you take the car to the dealer make sure the OEM motor mount is installed and the AP is uninstalled, and hopefully the dealer will not pick up that the car has been tuned. All they need to do is plug it in and they can read how many times the car has been started since the ECM was last flashed. No hiding it if they check. If the engine or drive train have been modified, they might look to void any engine/drivetrain warranty.