Bge drifting. Help !

Hi guys, I just started out using the BGE,
The project goes as planned, I’m working on a race game demo.
However I can’t figure out, how to make my cars drift.
I tried to use a animation, when A/D key is pressed but that won’t work ofcourse.
Because you are stuck in a animation when doing that.
Then I tried to rotate using motion bricks, that also don’t work because it rotates the hole car.
But I only want the back of the cars to rotate ofcourse.
Can somebody help me, or send me in the right direction thanks…