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Projects Rear end identification please

Discussion in 'The Hokey Ass Message Board' started by StarDiero75, Sep 19, 2017.

  1. StarDiero75
    Joined: Jan 15, 2017
    Posts: 175

    StarDiero75
    Member

    Howdy everyone!

    So my rear end is needing some love and I thought it was a ford 8 in but it may be a 7.5. Can anyone please tell me what it is so I can start rebuilding it?
    It's got an octagon shape and 8 bolts.
    20170919_133357.jpg Thanks everyone!
     
    chryslerfan55 likes this.
  2. StarDiero75
    Joined: Jan 15, 2017
    Posts: 175

    StarDiero75
    Member

    It's out of a 64 or 65 Falcon with a 6.
     
  3. 64 DODGE 440
    Joined: Sep 2, 2006
    Posts: 3,950

    64 DODGE 440
    ALLIANCE MEMBER
    from so cal

  4. StarDiero75
    Joined: Jan 15, 2017
    Posts: 175

    StarDiero75
    Member

    So it's not an 8"? I'm not a rear end guy, but the 8" pulls out from the front right? Then what's this?
     
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  5. onetrickpony
    Joined: Sep 21, 2010
    Posts: 333

    onetrickpony
    Member
    from Texas

  6. Mr T body
    Joined: Nov 2, 2005
    Posts: 1,861

    Mr T body
    Alliance Vendor
    from SoCal

    If you're at a point where you can upgrade to an 8 or 9", I would do it now. Ring and pinion sets are scarce as hen's teeth and they aren't they strongest diff to start with. You can find bearings and seals, but if there's an issue with anything else you're SOL.
    My kid managed to strip the teeth on the ring gear and I wound up going with an 8".
     
  7. StarDiero75
    Joined: Jan 15, 2017
    Posts: 175

    StarDiero75
    Member

    Would a 8" be a direct fit? I'm looking at one on Craigslist. It's complete with the drums as well too. Would anything need to be done to the driveline to make it work?
     
  8. Mr T body
    Joined: Nov 2, 2005
    Posts: 1,861

    Mr T body
    Alliance Vendor
    from SoCal

    The tape measure is your friend. Measure wheel mounting surface to wheel mounting surface and look for something the same. I would think early V8 falcon would be close to bolt in. Driveshaft will be different, maybe brake hose.
     
  9. onetrickpony
    Joined: Sep 21, 2010
    Posts: 333

    onetrickpony
    Member
    from Texas

    Wheel bolt pattern can be different on 8" depending on what it came in.
     
  10. StarDiero75
    Joined: Jan 15, 2017
    Posts: 175

    StarDiero75
    Member

    A 8" out of a 66 mustang is about 2 1/2" narrower than the 7.25 I got now, what will that do to the car?
     
  11. Lost in the Fifties
    Joined: Feb 25, 2010
    Posts: 376

    Lost in the Fifties
    ALLIANCE MEMBER

    If that differential is original to the Mustang, it should be a bolt-in.
     
  12. porknbeaner
    Joined: Sep 12, 2003
    Posts: 40,867

    porknbeaner
    Member

    It is the rare 8 bolt henway.
     

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