I'd say it'* not safe to drive until we find out exactly what directions the play is in.
Read that page again, and check yourself, so you can tell us from your own observations. In and out, back and forth, sideways, etc. We need you to check all those directions. While you're at it, check the level of the oil in the nosedrive.
We still don't know if it'* just a coupler until we get these questions answered. Also, please don't use all caps when typing. It'* like yelling on the internet.
If it'* just the coupler, we can talk you through it very easily. However, as Nate (lakeville) mentions, there'* alot of other stuff you should tackle at the same time.