When stationary and you apply the throttle and move off, I sometimes get a sort of donk or kick, it's as if there is some slack being taken up, but it is just after the car is in motion and don't feel like a worn out drive bearing, that would be when you start to drive, this seems to be just after the drive has taken up, I was wondering if it could be the splines on the drive shaft, perhaps they are sticking and not sliding freely, I am sure I get it sometimes when I come to a standstill.