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I'm putting a limited slip rear end in my '05 3500. It's 11.50 in. 3.73 ratio. The only numbers I can find are on a sticker on the passenger side axle tube. Parts guy says none of these numbers match up. Numbers are: (T)X2DH287421591 and (P)52104 and 665AG. Any way to tell if it is Dana or Corporate w/o tearing it apart? Called the dealer to run VIN and they could only tell it was 11.50. Thanks