Thank you, that is what I'll try. I think you're right. There was some side to side play in the T3, before I disassembled. Do you think that the bearings in the center section is what wears, or do I need to worry about the shaft. I will mic the shaft today and compare to the newer T4 shaft.
Yes, you can see on the backside of the compressor wheel where it was balanced, and I will definitely use a new nut. As a note; the T4 shaft has a left hand thread, and looking at the rotation of the shaft, this makes sense. Anybody have issues with the nut loosening on the T3?