well basicly, when i first start up my car everything seems to be fine, it engages drive and reverse fine, but after running for a few mins/seconds it stops moving and only moves when it wants to (somtimes around 3500 rpm) and also only after its been runnin for awhile it starts to make all sortas different sounds depending what it is in, d, n or r. but if i shut the car off, and turn it back on it works again for a lil with no noise, then it starts all over again, whats going on?