Here's another odd thing
I'm building this up from my parts stock. The only good Tract-Loc cover I had was for 1.78 ID bearings. no problem as I had a G case in stock that takes the matching 3.06 OD carrier cup. here is the rub??? Even though the carrier uses the larger bearing ID, a 31 spline axel won't go through the carrier, only 28 will?????