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Gear Oil for Front Diff on a free-wheeling hubs?

Discussion in '1st Gen. Tacomas (1995-2004)' started by JaCkaL829, Feb 20, 2013.

  1. Feb 20, 2013 at 5:59 PM
    #1
    JaCkaL829

    JaCkaL829 [OP] Member

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    Hello,

    I just picked up a 96 Tacoma, I wasn't sure how the 4wd system works, but after reading the owner's manual last night, I realized my Tacoma has the free-wheeling hubs, not the Automatic Differential disconnect (ADD). With that said my owner's manual recommends 80W-90 for my front differential for NON-ADD for a change, along with 80W-90 for the rear.

    Now my Haynes book, has the same oil viscosity recommendation for the rear, but for the front it says 75W-90. Just wondering which one is correct? I just bough a gallon of Valvoline dino 80W-90 and just want to make sure it'll be OK for the both differentials. I plan on using Redline MT-90 for my manual transmission fluid, and probably dino Valvoline 75W-90 for the transfer case. The cost of gear oil isn't cheap lol.

    I just wanted to double check the correct gear oil viscosity for the front. The dino Valvoline 80W-90 does say it works for hypoid. Not sure if I'm overconcerned and splitting hairs with these oils.

    Thanks in advance!
     
  2. Feb 20, 2013 at 6:04 PM
    #2
    fireturk41

    fireturk41 I like to break shit!

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    it really dont make a difference

    just avoid royal purple
     
  3. Feb 20, 2013 at 6:08 PM
    #3
    Taylor

    Taylor Wants to learn all about his Taco.

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    Extra badges, painted skidplates, grey wire mod, Kenwood double-DIN headunit, pioneer amp, 12 inch MTX sub, playstation 2 under seat, Uniden CB with 5 foot Wilson 1000 antenna, deckplate mod, 4xinnovations sliders, diff breather mod, bilstein 5100s at all 4 corners, OME Dakar Leaves, BAMF BPV bracket, Wheelers greasable shackles,
    Why's that?
     
  4. Feb 20, 2013 at 6:10 PM
    #4
    bowzerdoo77

    bowzerdoo77 U.S.M.C.

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    I have used Royal Purple for years and have had no trouble at all
     
  5. Feb 20, 2013 at 6:10 PM
    #5
    fireturk41

    fireturk41 I like to break shit!

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    found to have the absolute worst wear of all the gear oils tested, Lucas is what ecgs reccomends
     
  6. Feb 20, 2013 at 6:12 PM
    #6
    bowzerdoo77

    bowzerdoo77 U.S.M.C.

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    good to know too late for me at this point 115K so I guess ill just keep using it at this point

    where can you see wear results?
     
  7. Feb 20, 2013 at 6:14 PM
    #7
    fireturk41

    fireturk41 I like to break shit!

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    Don't use royal purple ever under any circumstance!!! Likely the worst gear oil ever made. 15k diffs with royal purple look like they have 200k on them. It thins out and provides no gear cushioning and does not control heat.

    he reccomends 85-140 lucas.

    never too late to change also make sure the trans has gl-4 not gl-5, gl-5 has been known to eat brass
     
  8. Feb 20, 2013 at 6:18 PM
    #8
    SpeedoJosh

    SpeedoJosh Well-Known Member

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    I just changed all those fluids today. I went with amsoil. There is a dealer here on TW that gives a great discount, making it the same, if not less then most of the stuff you get at the autopart store, minus their own brand.

    Went with GL5 75w-90 for the diffs, and GL4 75w-90 for the trans and transfer case.
     
  9. Feb 20, 2013 at 6:21 PM
    #9
    bowzerdoo77

    bowzerdoo77 U.S.M.C.

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    Ok I'll change it soon then
     
  10. Feb 20, 2013 at 6:47 PM
    #10
    JaCkaL829

    JaCkaL829 [OP] Member

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    Is the GL-5 oil OK for my transfer case? I already picked up Redline MT-90 which is GL-4 for the manual transmission fluid.
     
  11. Feb 20, 2013 at 7:07 PM
    #11
    TacomaJPP

    TacomaJPP To secure peace, is to prepare for war

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    I run Amsoil everything (yes, even coolant) and have a combined 315,000 on my two Tacomas with no lubricity issues.
     
  12. Feb 20, 2013 at 10:46 PM
    #12
    Digiratus

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    The MT90 is a great choice for the 5-speed. And yes, GL-5 is OK in the t-case, its only the manual transmission where you don't want to use GL-5.
     

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