I have a problem with my gearbox I think. When in stationary/slow traffic or approaching junction/traffic lights car always feels as if it wants to race forward.Few times I've experienced a violent jerk as if i have been hit from behind and also the idle seems to be hunting(Slight increase and decrease ) . It has stalled few times at junctions as well. Anybody has similar problems and what to do to help fix the problem. Thanks in advance.