My TTIs touched the steering gear box.... I removed the slim motor mounts and installed the thick motor mounts and problem solved. I'm talking about the rubber insulators.
The rubber insulators on my mounts look like they are at least an inch thick, maybe a little thicker. I am assuming that they are the thicker of the two you are talking about.
Still haven't gotten out and measured yet, trying to get the house cleaned up. And you can see how well that is going since I am here...