[Autoban]

I noticed yesterday that I can turn my steering wheel ('86 Carrera) about 20 degrees without any resistance before the wheels move. I drove the car yesterday morning and didn't noticed it. In the afternoon I was going to get groceries and noticed the play. I parked the car for now until I can fix it.
I searched the forum to find out where in the steering mechanism the fault could be to cause this, but didn't find anything. I have Turbo tie rods installed just two years ago and a Momo wheel. Any suggestions where to look first?

Juergen