Have you checked your EPA's on the radio and made sure both sides are maxed out properly (properly meaning far enough but not to far enough to damage the servo)? I think thats a better place to start than toe and diff fluids. But as far as front toe out, you never want anymore than 2-2 1/2 degree's. In the rear, 2 to 4 degree's of toe in is where you want to be.