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Differential/T-case fluids

Discussion in 'Technical Chat' started by bigmooze, Jan 19, 2012.

  1. Jan 19, 2012 at 1:52 PM
    #1
    bigmooze

    bigmooze [OP] Well-Known Member

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    Richard
    Belle River, ON
    Vehicle:
    2009 4x4 access cab SR5
    Bilstein 5100's all round (0" up front with stock springs), 265/75/16 Goodyear Wrangler Duratracs, K&N 63 Series Aircharger Kit, Flowmaster Super 44 Muffler, Delta Champion Toolbox, fog lights, back-up lights, Sirius satellite radio with PA15-TOY, Midland 1001z CB radio with 2' Firestik II antenna, Weathertech floor mats, AVS sill protectors, Marathon SuperHides Seatcovers (Universal Digital Camo), trimmed front mud flaps, Viair 20005 OBA, Warn W650D driving lights and W650F fog lights on N-Fab light bar, Hi-Lift X-treme jack with off road accessories, TracRac "TracONE" system
    I just had my truck in at the dealership from some fluid changes. I had them change the front and rear differential fluids and the transfer case fluid.

    This was the fourth scheduled "4x4 service."

    They used 80W90 fluid in all three parts each of the first three times, but called me today to tell me the fluid is supposed to be synthetic.

    I asked them to use 80W90 again today. I figure I made it 125,000 km with no apparent issues, but does anyone see any massive problem with the 80W90 over other fluids? Thanks.
     
  2. Jan 19, 2012 at 1:55 PM
    #2
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    F-150 Mod
    I don't believe I put synthetic in my diffs or transfer case... also don't believe the Owner's Manual said to. Check your manual, as long as you're using what they recommend, I wouldn't worry about it.
     
  3. Jan 19, 2012 at 1:58 PM
    #3
    DeeKay21

    DeeKay21 Lieutenant Dan.

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    Your fine with the 80W90, thats what I used on mine as well.
     
  4. Jan 19, 2012 at 2:03 PM
    #4
    bigmooze

    bigmooze [OP] Well-Known Member

    Joined:
    Jan 10, 2009
    Member:
    #12437
    Messages:
    797
    Gender:
    Male
    First Name:
    Richard
    Belle River, ON
    Vehicle:
    2009 4x4 access cab SR5
    Bilstein 5100's all round (0" up front with stock springs), 265/75/16 Goodyear Wrangler Duratracs, K&N 63 Series Aircharger Kit, Flowmaster Super 44 Muffler, Delta Champion Toolbox, fog lights, back-up lights, Sirius satellite radio with PA15-TOY, Midland 1001z CB radio with 2' Firestik II antenna, Weathertech floor mats, AVS sill protectors, Marathon SuperHides Seatcovers (Universal Digital Camo), trimmed front mud flaps, Viair 20005 OBA, Warn W650D driving lights and W650F fog lights on N-Fab light bar, Hi-Lift X-treme jack with off road accessories, TracRac "TracONE" system
    Encouraging, thanks.

    Manual calls for Toyota Genuine Diff Gear Oil LT 75W-85 GL-5 in differentials and Gear Oil API GL-4 or GL-5 (recommended 75W-90) in transfer case.

    Dealership has always used the 80W90 in all three, so I'm reluctant to change now. It's changed every 30-32,000 km (20,000 mi).
     
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