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Is the G80 a gov loc?

Discussion in 'The Garage' started by Eric M., Oct 15, 2005.

  1. Eric M.

    Eric M. 1/2 ton status

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    I have an 88 2wd 3/4 ton Burb with a 14 Bolt FF. The list of codes in the glove box shows G80. Is that a Gov Loc option in 1988? Any code in there that will tell me the gears?

    I'm being lazy and don't wanna pull the cover :D

    Eric M.
     
  2. ryan22re

    ryan22re 1/2 ton status

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    yep g80 is gov loc

    look for gu6 or gu5 or any other g codes.

    i think ht6 is 4.56

    gu6 is 3.42

    ryan
     
  3. sandawgk5

    sandawgk5 3/4 ton status

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    To say that G80 is a gov-loc is a mis-nomer. Yes g80 is the standard RPO for a locking differential. Is it a Gov-loc chances are yes however if you look at the M1009 they will have a G80 code but as we all know they have detroits. Also some 1 tons that had the Dana 70s also had lockers that were not gov-locs. Not trying to start a flame war but G80 does not mean "Gov-Loc" it means locking differential of some form.

    Ira
     
  4. 6.2puller

    6.2puller 1/2 ton status

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    He tells the truth. G80 in a D70 is not a gov loc but a pwr loc. In your application a G80 is a gov loc though.
     
  5. Blazer1970

    Blazer1970 1/2 ton status

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    G80 was also used for the Eaton limited slip that was used in the '60s and early '70s prior to the release of the Gov-lock. In an '88 Suburban though, it is guaranteed to be a Gov-lock.
     
  6. sandawgk5

    sandawgk5 3/4 ton status

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    Yep sorry I did not read thouroghly and did not see you specified an 88 3/4 ton. Yes you have a gov-loc and apparently they are not as failure prone as the 10 and 12 bolt variety but they do fail at times. I just get annoyed with the G80 = gov-loc response.

    Ira
     
  7. atho

    atho 1/2 ton status

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    I am not sure that RPO codes are even listed on CUCV's.
    But (sorry to nitpick) the detroit locker (no-spin) that came optional in the older chevy's with the Eaton H052/72 rearend is "G86 No-Spin" on the RPO sheets.
     
  8. sweetk30

    sweetk30 professional hooker Premium Member

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  9. Eric M.

    Eric M. 1/2 ton status

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    Thanks guys. Gov Loc it is. I'll check the glove box for any codes that could be gearing.

    Eric M.
     
  10. resurrected_jimmy

    resurrected_jimmy 1/2 ton status

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    G4= 3.73 G5= 4.10
     
  11. Eric M.

    Eric M. 1/2 ton status

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    Great, that's what I'm looing for.


    Eric M.
     
  12. 90K5

    90K5 1/2 ton status

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    i think its GT4 and GT5....
     
  13. jays68yak

    jays68yak 1/2 ton status

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    I noticed the G80 but didnt remember what the gear codes were. Id be interested to know what it was. :D
     
  14. Eric M.

    Eric M. 1/2 ton status

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    G80, GT5

    4.10 w/ a Gov Loc! It'll look good in my pile-o-differentials. This one is a keeper. I'll be selling the 74 14 Bolt FF, 4.10 w/ open diff.

    Eric M.
     
  15. dremu

    dremu Officious Thread Derailer Premium Member

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    Umm ... when you say M1009, do you mean "everything but the M1009"?

    I thought the M1008, 1028, 1010 and whatever the fourth 1-ton pickup had the Detroits, as they're 14BFF's, and the M1009 Blazer had a Gov-loc being a 10-bolt.

    -- A
     
  16. monster man

    monster man 1/2 ton status

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    I'm pretty sure that is the case also- M1009's had the Gov-Loc, Pickups had the Detroit and 4.56's
     
  17. sandawgk5

    sandawgk5 3/4 ton status

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    Yep I got my numbers mixed up I could not remember which was the K5. 50/50/90 I guess but what I meant to say was that the military Blazer only had a gov-loc all others had something else.

    Ira
     

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