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what kind of diff is this?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by scrapper, Jul 25, 2000.

  1. scrapper

    scrapper Registered Member

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    I need help trying to figure out what type of limitted slipp diff I have installed in my 85 10 bolt axles?The only identifying marks are cast in numbers(04.6).It can be described as having some type of a gear on the input spyder,that drives a centrifigal deal that must lock up the rear end.It also have a clutch pack behind the side spyder gears.My biggest question is what type of gearoil should be used with this unit?I would like to run a synthetic gear oil.But does this type of unit require a limitted slip oil?
     
  2. Blazer1970

    Blazer1970 1/2 ton status

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    It's an Eaton Gov-lock. You do not need to use limited slip additive.

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  3. scrapper

    scrapper Registered Member

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    Thanks for the help in identifying the diff.Any recommendations on a synthetic gear oil?
     
  4. Executioner

    Executioner 1/2 ton status

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    Some clutch materials and synthetic gear oil don't work well together.
    If was you I would contact Eaton directly and find out, they have a web site, and good tech. help dept.
    Let us know if you contact Eaton, and tell us what they say about synthetic and the Gov-lock.
     

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