So, I decided to try something today, while I was installing some pedals. I noticed that the steering clunk seemed louder and more prominent when the steering wheel was tilted at certain angles. I also noticed that there was some white grease coming out of the tilting portion of the intermediate shaft. After spraying some grease in there the clunking was gone. Now, I doubt this is a permanent fix but it seems to get rid of it in the short term. Plus it is super easy to do.
Center your steering.
Look under your dash and find the plastic shroud covering the base of your steering rack, just behind the pedals.
Lift up and pull out to remove it.
Use a 12mm socket to remove the bolt. A wrench won't be thin enough. You might need an extension. I used a small impact driver and a 12mm deep socket.
Unlock your tilt by lifting up on the lever.
Push up on the skinny part of the shaft until it detaches from it's base then pull out to reveal the bottom end of some splines.
I used some spray grease because that's what I had laying around. I think a thicker synthetic grease would be better in the long run. Coat those splines and pump it.
Re-assemble and go for a drive.
I went for a quick drive around the block and didn't hear a peep from the steering. I almost forgot what it felt like to have smooth low speed steering. It was eerie. Let me know if this works for you.