Huummm, interesting. But this sentence scares me,
"By installing two thrust washers on each axle gear instead of one, the gears are moved inboard enough to cause the pinion gear pitch diameters to bind",
couldnt this cause alot of wear on the gears, get hot from alot of use and fail and weld things together and f*&k it up. Im not a rear-end guy (cars anyways,lol.)
Rick