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Changing gear lube...What Weight?

Discussion in '40- & 55-Series Tech' started by Iron_Pig, Sep 8, 2003.

  1. Iron_Pig

    Iron_Pig

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    I'm fixing to change the lube in differentials,transmission,and transfer case on my '78 FJ40. I won't be using synthetics on such a high-mileage vehicle due to leak potential.
    Can someone tell me the weight gear lube and capacity PLEASE. ???
     
  2. axlechassis

    axlechassis

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    To change them all get 2 1/2 gallons of 80w90 and you willl have a little left over. Each one takes slightly over 2 quarts.
     
  3. Design311

    Design311

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    Yup, 80W90 used here too :D Get yourself a lube pump while you're at it. They are cheap and make it MUCH easier to get the fluids up in the tranny and tcase. Have fun!!

    http://doityourself.com/store/6847610.htm
     
  4. bad_religion_au

    bad_religion_au

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    80W90 here as well, and second the lube pump. this is the job i chipped half my front tooth off in.

    can anyone convert gallons and quarts to real measurements (metric)
     
  5. Design311

    Design311

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    [quote author=bad_religion_au link=board=1;threadid=5059;start=msg38932#msg38932 date=1063034214]
    80W90 here as well, and second the lube pump. this is the job i chipped half my front tooth off in.

    can anyone convert gallons and quarts to real measurements (metric)
    [/quote]

    Here's a great link to keep handy for conversions:
    http://www.onlineconversion.com/
     
  6. bad_religion_au

    bad_religion_au

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    thanks heaps, so basically 2 liters for each
     
  7. woody

    woody Internet Fireman Staff Member

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    there is a fill plug on everything...when fluid drips out of the plug hole, it's full. If you have a rotated front/rear axle (SOA or something) then a couple extra "plunges" on the pump will overfill it enuf to keep the pinions lubed.

    I've yet to measure...lol
     
  8. fsusteve

    fsusteve

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    If you haven't rebuilt your front knuckles, don't be surprised to see milky fluid come out the front axle.
     
  9. CruisinGA

    CruisinGA

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    I bought a 5 gallon bucket of 80/90 from Autozone for $23. And a industrial pump from Napa for $50. This makes changing/adding oil under the cruiser VERY easy, quick and cheap.
     
  10. Iron_Pig

    Iron_Pig

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    So 80w90 it is! Thanks again. :banana: :banana: :banana:
     
  11. Jonathan_Ferguson

    Jonathan_Ferguson ★ is in the wrong locale SILVER Star

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    My Manual printed in 1986 says SAE90 for the Diffs, Transfercase, Gearbox and Steering Box. ::)

    I currently have Valvoline Hypoid 85W/140 in the Diffs, Transfercase and Gearbox, And Valvoline LS90 in the Steering Box.
    Previously had Mobil 80W/90 in the gearbox and I could feel and hear the Syncros have a huge whinge every time I placed it into gear. :mad: With the Valvoline Hypoid 85W/140 it's so smooth and no clunking Noises. :)