My manual says "there should be approximately a 7/16 inch air gap between a straightedge across the bell housing flange and the torque converter." The accompanying diagram shows the air gap to be between the "hub" of the torque converter (that the pump shaft slides into) and the straightedge. After trying numerous times on the new and then the old ATX I could not get more than 1/8 inch air gap. I then measured the air gap between the straightedge and the pump shaft with the pump shaft properly seated in the ATX. I only got 3/8 inch. Then, using some crude measurement techniques, I measured the thickness of the torque converter hub end to be approx 1/4 inch. That means that when the torque converter is properly seated on the pump shaft the maximum aig gap (between the straightedge and the torque converter) can only be approximately 1/8 inch (3/8 inch to the end of the pump shaft minus the 1/4 inch thickness of the torque converter hub. Can anyone out there verify that from experience??????????????????????