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Trany fluid / T-case / Front + Rear Differential service

Discussion in '1st Gen. Tacomas (1995-2004)' started by bbruhis, Jan 19, 2020.

  1. Jan 19, 2020 at 4:33 PM
    #1
    bbruhis

    bbruhis [OP] Member

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    Have a 2003 Tacoma V6 4x4 (TRD, SRS)

    Done a good amount of research. So far I've gathered I need to get the below gaskets but have a few questions:

    1) Any recommendations on synthetic oil to use? I live in Colorado so dealing w colder temps. Are all 4 the same or is tranny / t-case different than the differentials?

    2) Anyone know how much oil to add to each?

    Here are gaskets I've got:

    Transmission drain plug washer (aluminum) = part #90430-18008 / 90430-A0003, 27 ft lbs, ($1.51/ea)
    Transmission fill plug washer (aluminum) = part #90430-18008 / 90430-A0003, 27 ft lbs, ($1.51/ea)

    Transfer case drain plug washer (aluminum) = part #90430-18008 / 90430-A0003, 27 ft lbs, ($1.51/ea)
    Transfer case fill plug washer (aluminum) = part #90430-18008 / 90430-A0003, 27 ft lbs, ($1.51/ea)

    Front diff drain plug washer (copper) = part #90430-24003, 48 ft lbs, ($1.74)
    Front diff fill plug washer (crush style) = part #12157-10010, 36 ft lbs, ($1.23/ea)

    Rear diff drain plug washer (crush style) = part #12157-10010, 36 ft lbs, ($1.23/ea)
    Rear diff fill plug washer (crush style) = part #12157-10010, 36 ft lbs, ($1.23/ea)
     
    GQ7227 likes this.
  2. Jan 19, 2020 at 5:09 PM
    #2
    turbodb

    turbodb AdventureTaco

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    For oil - if you want to use synthetic, then MT-90 is a good choice and you can run it in all four locations. It's not cheap however, so I'd recommend using dino-oil where you can - our diffs/transfer case are more than happy to run Lucas 80W-90, even at cold temps.

    Personally - and I just did this on Friday as part of my new-year fluid changes (I drive ~30K miles/yr, mix of highway/dirt) - I put the Lucas 80W-90 in my front diff, t-case, and rear diff, and I put MT-90 in my manual transmission.

    As far as amounts... as usual, fill until oil starts coming out of fill hole.
    • You'll likely need 5-6 quarts to do the front diff, rear diff, t-case. (I got away with a gallon, which is cheaper + 1 qt)
    • You'll need 3 quarts (but won't use all of it) for the manual transmission. Buy 4 quarts, it's a lot cheaper. Or 12 quarts for even more savings)
    As far as the crush washers go, this kit is often the best deal you'll find - price wise. I think you still need to get the transmission crush washers in addition to this though.

    One last thing - when you're doing the front diff, you might consider replacing the drain plug with one that uses a 14mm hex head, rather than the OEM 10mm allen key. For me at least, it makes removal much less stressful.

    [​IMG]
     
    GQ7227 and cubs16 like this.
  3. Jan 19, 2020 at 5:10 PM
    #3
    Black DOG Lila

    Black DOG Lila Well-Known Member

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    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
  4. Jan 19, 2020 at 5:52 PM
    #4
    bbruhis

    bbruhis [OP] Member

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    super helpful, thanks!!
     
    turbodb likes this.
  5. Jan 19, 2020 at 5:53 PM
    #5
    bbruhis

    bbruhis [OP] Member

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    GQ7227 likes this.

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