Auburn Gear Differential in '72 8 1/4 Housing?

Engine, Trans & Driveline

  1. JR_Charger

    JR_Charger FBBO Gold Member FBBO Gold Member

    Likes Received:
    Sep 30, 2020
    Local Time:
    6:25 PM
    I see that Auburn Gear makes two differentials for the 8 1/4 - the 27 spline AG 546072 for 68-96 and the 29 spline AG 546074 for 97-present. I'm planning to have custom 29 spline axles cut, so is there any other reason why the 546074 wouldn't work in the 72 housing?

    I also found this - "IMPORTANT: Chrysler 8-1/4” applications require modification to the axle housing as shown to provide clearance for the differential case. Clean housing after grinding." - from here -

    But the site doesn't actually show what needs to be done, so I have no idea what they're talking about.
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