Bukkit

What is the enhancement in mind? How should it look and feel?

1 - Gears
2 - Motor sound
3 - Rolling /-resistance

Please provide any additional information below.

1. Gears should be added with sticks beeing in the hotbar that you can click to shift up and down. The inventory is temporarily saved.
2. Motor sound with a vanilla sound that actually represents the speed and gear ratio.
3. Rolling when no brakes and air resistance that slows the car down automatically.

A tip:
Don't add speed to the motor, then translate it to the gears, just accelerate the car like this:

Velocity = ((WheelRadius * (MotorRPM * MotorTorque) / Mass) + Velocity) * (if clutchEnabled == true then 1, else 0)