Rear diff markings and codes.

Mopar General Discussions

  1. khuebner250

    khuebner250 Well-Known Member

    Messages:
    440
    Likes Received:
    320
    Joined:
    Jun 3, 2005
    Location:
    Fort Collins
    Local Time:
    4:22 PM
    I am thinking about putting assembly markings on the rear housing and center section of my 8 3/4. What would the stamp #'s/codes have been for a 1968
    8 3/4 with 3.55 Sure grip or a 3.91. any ideas. Seems like hard info to find.

    ORIG9.jpg
     
  2. Dana67Dart

    Dana67Dart Most undignified way to get to Colorado!

    Messages:
    1,642
    Likes Received:
    653
    Joined:
    Jul 16, 2017
    Location:
    Northern Colorado
    Local Time:
    4:22 PM
    I think the Dave Wise books have that stuff

    Products | MMC Detroit

    I also saw in a post here on FABO that the underside of the center section has color codes for the the gear ratio.
     
  3. MoparLeo

    MoparLeo NRA PATRON LEVEL LIFE MEMBER

    Messages:
    388
    Likes Received:
    201
    Joined:
    Feb 10, 2016
    Location:
    Moreno Valley, Cal. So. Cal.
    Local Time:
    3:22 PM
  4. Dana67Dart

    Dana67Dart Most undignified way to get to Colorado!

    Messages:
    1,642
    Likes Received:
    653
    Joined:
    Jul 16, 2017
    Location:
    Northern Colorado
    Local Time:
    4:22 PM
    That's the list I was thinking of.

    Just noticed that it only lists 741 and 489 center sections. I suspect the 742 would be similar. I have a 742 from 12/66 with 2.76 gears and a Sure Grip has 2 yellow and 1 orange (from front to back) There might be a bit of white right before the yellow but not sure
     
  5. khuebner250

    khuebner250 Well-Known Member

    Messages:
    440
    Likes Received:
    320
    Joined:
    Jun 3, 2005
    Location:
    Fort Collins
    Local Time:
    4:22 PM
    I found this anyone know what a 3.55 code would have been?

    20180329_065044.png
     
  1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.