Is this a good way to ID a 14 bolt open or gov-lock differential?

Discussion in 'The Garage' started by divorced, Jun 22, 2005.

  1. divorced

    divorced 3/4 ton status

    Joined:
    Jul 20, 2004
    Posts:
    5,115
    Likes Received:
    0
    Location:
    .
    It seems that about once a week someone posts a pic of a 14 bolt carrier wanting to know if it's an open differential or a Gov-bomb. Sometimes it is hard to tell from the pic what it is because of the angle, and difficult to decide if it has 3 pins or 4 pins. I was looking at some pictures I have saved of 14 bolt carriers and noticed something: Each one appears to have 12 ring gear bolts. In the pic of the Gov-bomb it appears to have 4 ring gear bolts between a set of pins, but on the open differential there are only 3 bolts between each set of pins. By using this method it would seem easy to ID a differential just by counting the number of ring gear bolts between a set of pins.

    Would this method of identification work?
     
    Last edited: Feb 15, 2006
  2. divorced

    divorced 3/4 ton status

    Joined:
    Jul 20, 2004
    Posts:
    5,115
    Likes Received:
    0
    Location:
    .
    Example: It is clear in this pic that there are 3 ring gear bolts between a set of pins, indicating an open carrier. (unless of course a Detroit has been installed)
     
    Last edited: Feb 15, 2006
  3. sweetk30

    sweetk30 professional hooker Premium Member

    Joined:
    Nov 1, 2004
    Posts:
    27,617
    Likes Received:
    2,375
    Location:
    horseheads , ny 14845
    Build(s):
    4
    yes i like your metod of id for 14 ff axle carriers.



    that one looks like a locker is in it also. no gears in the slots.:D
     
  4. divorced

    divorced 3/4 ton status

    Joined:
    Jul 20, 2004
    Posts:
    5,115
    Likes Received:
    0
    Location:
    .
    Yep, I think so too. I "borrowed" it from another post... :blush:

    And your blocks will ship tomorrow, we have a trip planned to the big city :D
     
  5. nvrenuf

    nvrenuf What update?? Premium Member

    Joined:
    Jan 7, 2002
    Posts:
    14,375
    Likes Received:
    1,297
    Location:
    Mobile, Al.
    Build(s):
    1
    For the sake of having it all in one place...


    On a 14 bolt Gov Lock carrier, the carrier itself will be smooth and cone shaped on the ring gear side with 3 sets of 2 round cuts outs (revealing clutch plate locating tabs). These round cut outs are circled in red.

    (pic from AkFabShop.com)

    govlock2.jpeg
     
  6. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

    Joined:
    Jan 27, 2003
    Posts:
    3,254
    Likes Received:
    0
    Location:
    Castro Valley, CA
    I dont mean to be ignorant but to me, the difference is clear. The gov loc carrier is smooth on the outside, an open carrier is not. A gov loc you can see the clutches, the open you see the side gears (or spring if a lockers in it). Gov loc is a 3 pin, open is 4. They dont look the same at all.

    Dont mind the yellow circles.
    [​IMG]

    [​IMG]
     
  7. divorced

    divorced 3/4 ton status

    Joined:
    Jul 20, 2004
    Posts:
    5,115
    Likes Received:
    0
    Location:
    .
    Yep, your right. I was thinking it may be easier for the guys who pop the cover off their first 14 bolt and don't really know what either should like like.
     
  8. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,084
    Likes Received:
    61
    Location:
    .
    I like those pictures better than trying to explain to someone. Always better to see the inside of the carrier so they can see the difference between 3 and 4 pin spiders. :cool1:
     
  9. gone huntin

    gone huntin 1/2 ton status Premium Member

    Joined:
    Oct 25, 2004
    Posts:
    1,729
    Likes Received:
    9
    Location:
    Coldwater, MS
    OK, I'm gonna throw a wrench into the works here. My carrier looks just like this one BUT it has 4 pin holes instead of 3. No, I did not miscount, I even had someone else count them just to be sure. No one so far has been able to explain this to me.
     
  10. nvrenuf

    nvrenuf What update?? Premium Member

    Joined:
    Jan 7, 2002
    Posts:
    14,375
    Likes Received:
    1,297
    Location:
    Mobile, Al.
    Build(s):
    1
    Pics?

    If you're counting the pins with the diff still in the housing be sure to mark one with paint or something so you don't accidentally miscount.
     
  11. gone huntin

    gone huntin 1/2 ton status Premium Member

    Joined:
    Oct 25, 2004
    Posts:
    1,729
    Likes Received:
    9
    Location:
    Coldwater, MS
    One was already marked with yellow paint, there are four. I'm not gonna pull it apart just to take pics, but next time I have it apart I will get some pics.
     

Share This Page