In a real car you can change the gear and nothing will slow down or speed up the wheels before you release the clutch. In the game you currently can not! The bug is noticeable when you have a high speed and change to a low gear, without ever releasing the clutch it still brakes the wheels for some reason. And I have checked that the clutch was at 100%, so this should not happen! This makes realistic driving impossible and is annoying since it has made my car (BT20) spin out of control several times.