I am putting a 19XL back together and I am having trouble with the impeller clearance. I have the service bulletin about setting the clearance. I take all the measurements to select the impeller shim thickness and I am coming up with a negative number. (-0.101) The bearing is fully seated into the transmission. I have checked everything 10+ times and I cant find where I am losing the clearance. -0.101 is way off and should be visible but everything looks like its correct.