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Front differential, Transfer Case and Rear Differential OILS

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Siraywat, Aug 4, 2023.

  1. Aug 4, 2023 at 4:58 PM
    #1
    Siraywat

    Siraywat [OP] Member

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    I want to change the fluids mentioned above in my 2007 Tacoma 4x4 double cab long bed.
    I know the rear differential is limited slip and requires the LSD additive. (I tested and the wheels spin opposite when lifted) I'm pretty sure the transfer case does not require the additive but I'm unsure on the front differential. Does it also require the LSD additive?
    I'm using AMSOIL SEVERE GEAR® 75W-90 | SVGQT-EA - AMSOIL for the rear differential
    I'm using AMSOIL 75W-90 Long Life Synthetic Gear Lube | FGR - AMSOIL for the transfer case.
    and I can only assume I will use the same SEVERE GEAR® 75W-90 | SVGQT-EA - AMSOIL for the front differential.
    Thanks.
     
  2. Aug 4, 2023 at 5:06 PM
    #2
    EatSleepTacos

    EatSleepTacos Well-Known Member

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    Front diff doesn’t need any additive. For the rear, the only way to be certain is to look at you door jamb sticker and the axle code. But, no harm comes from putting additive in there even if it’s not necessary.

    https://www.tacomaworld.com/threads/2005-2016-tacoma-axle-codes.408019/

    Where it says A/TM is the axle/transmission code. In this instance, A01A. This is from my 4Runner so doesn’t match the codes above, but gives you an idea.

    IMG_4036.jpg
     
    Siraywat[OP] likes this.
  3. Aug 4, 2023 at 6:28 PM
    #3
    O'DubhGhaill

    O'DubhGhaill Active Member

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    Redline MT90 in the trans and transfer, Redline 75W90 in the diffs. No additive needed with this for LSD per Redline. Smooth as silk shifting and H2 and H4 running. $.02.
     
    Ceedub53 likes this.
  4. Aug 4, 2023 at 7:07 PM
    #4
    Ceedub53

    Ceedub53 Active Member

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    Redline MT90 is the best of the best.
     
  5. Aug 4, 2023 at 7:27 PM
    #5
    TacoTuesday1

    TacoTuesday1 Well-Known Member

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    I switched from Redline MT90 to Amsoil in trans for smoother shifts.

    everything else went by Amsoil product selector feature to determine which oil. And LSD oil in my rear diff. Later switched to BG syn 75w140.

    front diff does not use LSD oil because it’s an open diff. No LSD clutch in there to require LSD oil.

    any oil change is better than no oil.
    If I regear might put whatever ECGS or Revolution recommend.

    Regear shop near me recommends specific weights of Schaeffer Gear Oil. Not sure why.

    putting LSD oil into a rear LSD is easier than putting regular conventional and then looking for a tube of LSD additive to squeeze in such as Motorcraft that is potentially also costlier to do it that way.
     
  6. Aug 4, 2023 at 7:34 PM
    #6
    nd4spdbh

    nd4spdbh Well-Known Member

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    1st. OP is a DCLB and can not possibly have a manual transmission (unless swapped... in which case i doubt hed be asking this question).

    2nd. To the OP just buy whatever the cheapest 75w-90 with LSD additives you can find it will work perfectly in the front / rear / tcase.

    While the front and tcase dont require the LSD additive it wont hurt.
     
  7. Aug 4, 2023 at 7:56 PM
    #7
    TacoTuesday1

    TacoTuesday1 Well-Known Member

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    also, OP
    mech LSD is early TRD Sport. Whether auto or manual.
    Should be a white rectangle sticker going vertically on the rear diff, that says LSD in red lettering.
     

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