I went through the same thing when I got my Yukon axles from Mancini which have green bearings.
I was told the rear end needs to come apart, carrier took out and thrush block removed. F**k that!
I took my axles to a machine shop, had professionals remove 3/8" off of each axle. Brought them home and they popped right into place. I have not had any trouble with them.... that's been 3 yrs ago.