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Markings on a D60

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Derf00, Sep 24, 2001.

  1. Derf00

    Derf00 1/2 ton status

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    While sandblasting my D60 I found numerous tool marks and numbers that would normally never be seen, but show up very clearly when the axle is stripped to the bare metal. The one that really has me interested in what is means was found on the diff cover. 72187X followed by the Ichthus symbol(fish symbol). Anybody have any ideas as to what it means?

    Derf00

    "A WISE MONKEY NEVER MONKEYS WITH ANOTHER MONKEY'S MONKEY."
     
  2. Shawn

    Shawn 1/2 ton status Premium Member Author

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    I have the same exact # and fish symbol on my thick D60 cover I just bought. I got it new in the box and it came from a military surplus seller. I could tell it's been sitting for awhile since the gasket was hard as a rock. The cover itself is 1/8" thick and has to be 3 times thicker than the stock GM covers. It also has a dimple with a round magnet glued on the inside of the cover. I assumed it's military only but I'm not sure.

    Shawn
    87 K5
    few mods [​IMG]
    <a target="_blank" href=http://www.off-road.com/chevy>www.off-road.com/chevy</a>
     
  3. Derf00

    Derf00 1/2 ton status

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    Wes, Brian, Rene? Any ideas?

    Derf00

    "A WISE MONKEY NEVER MONKEYS WITH ANOTHER MONKEY'S MONKEY."
     
  4. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Now that you mention it, I have never really paid much attention to the covers. [​IMG]

    I have seen and had the thick 1/8" covers before. Matter of fact, both of my K30's have the thick covers.

    I will need to get down and under to check for the numbers and fish symbol. Give me a day or so and I will see what mine show. [​IMG]

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>http://coloradok5.com/gallery/thatK30guy</a>
     
  5. Brians 60s

    Brians 60s 1/2 ton status

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    all military surplus 60s have the fish. I don't have a clue as to why. I have seen two stock front 60s out of k-30s one had the 1/8 thick cover like all the military one's do, the other was thin like a standard 60 rear diff cover. wish I could be more help. I never really paid attention to it till you brought it up. hd dave might know.

    IT'S A 1 TON THING.... IF I HAVE TO EXPLAIN IT, YOU WOULDN'T UNDERSTAND!!!
     
  6. wayne

    wayne 3/4 ton status

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    Sounds fishy to me. I have the thick cover too but have not noticed the markings on it.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  7. Emmettology 101

    Emmettology 101 3/4 ton status

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    Maybe it is a manufacturer date? 7-21-87 and the X means a thick cover? As for the fish, maybe the maker liked fish? [​IMG]

    Mike

    <font color=green>"My K5 is purdyr than your sister!"</font color=green>

    <a target="_blank" href=http://www.geocities.com/emmettology101>www.geocities.com/emmettology101</a>
     
  8. Kyle89K5

    Kyle89K5 1/2 ton status

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    Your not seeing the dana symbol are you? It's kinda like &lt;&gt;.

    The number is prb. a BOM or something along those lines.

    Kyle
    89K5
     
  9. MaxCrack

    MaxCrack 1/2 ton status

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    <a target="_blank" href=http://photos.yahoo.com/bc/dana60manual/vwp?.dir=/Dana+60+Manual&amp;.dnm=page05.jpg&amp;.src=ph&amp;.view=t&amp;.hires=t>Axle Identification</a>

    Some days I just pray for spontaneous combustionhttp://photos.yahoo.com/dana60manual
     
  10. Derf00

    Derf00 1/2 ton status

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    All the #'s are where they are supposed to be according to the axle ID chart provided by MAX. The axle was produce on 6 11 84. The #'s that I am curious about are stamped just above the fill plug on the cover. The symbol is definately a Ichthus and not &lt;&gt;.

    Derf00

    "A WISE MONKEY NEVER MONKEYS WITH ANOTHER MONKEY'S MONKEY."
     

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