Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Gov-Lock owners

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dyeager535, Oct 1, 2001.

  1. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,977
    Likes Received:
    189
    Location:
    Roy WA
    Happened to be checking out one of my favorite reference materials(about limited slip, posi, you know : ) and ran across the gov-lock (eaton positive locking differential) section. Never seen this in print anywhere else, but you are NOT supposed to run limited slip diff additive in the gov lock. Same goes for the (3/4ton?) Gov-Lock.

    It lists 5 different types of "limited slip diffs" installed in trucks. the one that I thought was Auburn (cone clutches) is atually a Borg Warner unit, and one LS diff is Eaton, one Chevy, and one a "power-lok" whoever makes that.

    Just thought I'd pass that info on! : )


    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     
  2. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    I think the "Power-Lok" was made by Spicer.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  3. tom

    tom 1/2 ton status

    Joined:
    May 20, 2000
    Posts:
    157
    Likes Received:
    0
    Location:
    So. Cal
    My shop manual agrees that no addative is needed in the Gov-Lok. I've been running GL-5 in a 3/4 ton Gov-Lok for 160,000 miles with no problems.
     
  4. Executioner

    Executioner 1/2 ton status

    Joined:
    Feb 22, 2000
    Posts:
    1,530
    Likes Received:
    0
    Location:
    Temp. Ft. Walton Beach Fl. home=Tucson, Az.
    Just don't beleive everything you read !
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,977
    Likes Received:
    189
    Location:
    Roy WA
    Are you saying that the GM service manual is wrong? Not that it hasn't happened before (1985 Monte Carlo SS's didn't get 800CFM Q-jets for example) But with something like 5 or 6 different axles listed for the the trucks, made by at least two different manufacturers, you don't think the number of "Posi Units" used could equal that? Or you think that GM is wrong with the additive?

    At least I learned something from that manual...didn't realize the gov-lock (is supposed) to unlock at over approx. 20MPH. Max tire speed differential at low speeds before it "locks" is 100RPM.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     
  6. michaelm

    michaelm 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    872
    Likes Received:
    0
    just run 4096 pennzoil in everything. has the additive in it i believe
     
  7. bigblue

    bigblue 1/2 ton status

    Joined:
    Dec 6, 2000
    Posts:
    658
    Likes Received:
    0
    Location:
    southern california
    OOPS! to late for me!

    Surfing is Life...
     
  8. Jeff427

    Jeff427 1/2 ton status

    Joined:
    May 22, 2000
    Posts:
    1,186
    Likes Received:
    0
    Location:
    Gladwin, MI
    I think this needs more input, back to top [​IMG]

    Jeff427
    <a target="_blank" href=http://lyonsdesign.bizhosting.com>Lyons Design Web Site</a>
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,169
    Likes Received:
    1,369
    Location:
    E-town baby!
    Hey Dorian,
    I used to have a 2wd 88 GMC shortbox and it had 3.42's and the Gov-lock. If I wanted to roast em up the truck would start out all sideways [​IMG] and all of a sudden it would revert to one wheel peel. So I guess the Gov-lock in that truck was working correctly...[​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     

Share This Page