Olddog The .027" is fine. The more important thing is getting the back lash down to the Min. IF you have a high powered car or drag race with a locker or spool, we run them tight with a .003" of lash. The spec with a posi is the .005" to .012". Over time the bearing with loosen up and the lash number will get a little larger. I set mine at .003" and do a couple of clutch releases to seat the gears and bearings. This will not work on a bench. You should end up with a .005" -.007" when done. You are right on the mark. What
oil are you looking to use is the other thing. This needs to do a couple of heat cycles. After this a final check, you should be good for 100K. Rick L.