The gears need to be made for a 2 series carrier (you have 2.73 which makes
it a 2 carrier. A rearend that came with 3.23 gears would be a 3 series
carrier). If the 4.11 gears aren't made for a 2 series carrier, they won't
fit and you'll have to get a whole new housing to "make" them fit.
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