2000 Buick Regal leaking trans fluid

I recently replace the cv joints, tie rods & tie rod ends on my front driver & passenger sides. I also had to replace the seal by the cv joint on the drivers side. Car worked fine for about 3 days then started leaking trans fluid on the drivers side. So, replaced the seal again. Drive another 2 days fine. Then the leak was back. Seems to be a little play in the shaft behind the seal could that be messing up the seal? What needs to be done to correct this issue.