i have a rear end question!

Here is another video of the car leaving. If I leave out about 2k the car is straight but if I leave at 3200 it justs left. I'm now thinking it maybe the front end. I just checked the rear end and everyt looks tight. It don't appear to have any movement in it. I do check it often.[ame="https://www.youtube.com/watch?v=TeBDtHrL0bM&feature=youtube_gdata_player"]VIDEO0010.mp4 - YouTube[/ame]