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Transfer Case and Diff Oil Change

Discussion in '1st Gen. Tacomas (1995-2004)' started by galgenstrick, Nov 10, 2015.

  1. Nov 10, 2015 at 2:11 PM
    #1
    galgenstrick

    galgenstrick [OP] Member

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    Noobie question. I'm planning on doing all the fluids on my '04, it's got 100,000 miles and I don't know if the fluids were done at 90k. I went to the dealership to get all the gaskets and crush washers. They told me the front differential and transfer case shared the same drain/fill plug. Is this correct?
     
  2. Nov 10, 2015 at 3:07 PM
    #2
    chowwwww

    chowwwww Well-Known Member

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    Believe they are. 10mm allen bolts.
     
  3. Nov 10, 2015 at 9:34 PM
    #3
    galgenstrick

    galgenstrick [OP] Member

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    Last edited: Nov 10, 2015
  4. Nov 11, 2015 at 12:49 AM
    #4
    opteron

    opteron Well-Known Member

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  5. Nov 11, 2015 at 2:34 AM
    #5
    bry838

    bry838 Well-Known Member

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    The front diff will be an allen head, the transfer case should be a big ass 24mm thin headed hex bolt.
     
  6. Nov 11, 2015 at 7:04 AM
    #6
    galgenstrick

    galgenstrick [OP] Member

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    So you're saying the transfer case and front diff are not sharing the same drain and fill plugs On the gen 1 tacos?

    Basically the dealership gave me 6 washers to do the front and rear diffs, transfer case, and manual transmission. I thought I would need 8, but they said the T case and front diff were shared...
     
    Last edited: Nov 11, 2015
  7. Nov 11, 2015 at 8:59 AM
    #7
    Digiratus

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    On my '02, only the front diff fill plug is a 10 mm allen key type.

    The drain plug on the front diff and the drain and fill on the t-caes are not the allen key type. As @bry838 said, they take a 24 mm socket or wrench the same as the rear diff fill and drain.
     
  8. Nov 11, 2015 at 9:05 AM
    #8
    galgenstrick

    galgenstrick [OP] Member

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    Thanks. I think you misunderstood my question. The dealer said that the front differential and transfer case shared the same oil, as in there is one drain plug and one fill plug to change the oil on both. He only gave me 6 washers to do front, rear, transmission and T case. I'm pretty sure now he had no idea what he was talking about and I need 8 washers not 6, because the T case has its own drain and fill plug.

    Now I just need to figure out which washers I'm missing...
     
  9. Nov 11, 2015 at 10:41 AM
    #9
    bry838

    bry838 Well-Known Member

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    The ones youre missing will be the same ones you got for the manual tranny, theyre the same style fill and drain bolt.

    That dude is an idiot if he thought the diff and transfer shared oil and drain and fill plugs!!! Theyre nowhere near eachother!
     
  10. Nov 11, 2015 at 10:54 AM
    #10
    opteron

    opteron Well-Known Member

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  11. Nov 11, 2015 at 10:55 AM
    #11
    galgenstrick

    galgenstrick [OP] Member

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    Haha, yea. After looking under the truck this morning, I know where everything is now. He gave me Copper + steel crush for the front, 2 steel crush washers for the tranny, and 2 aluminum for the rear. After a little research, I'm guessing he was wrong on that too...

    I believe I need:

    1 copper for the front drain 90430-24003
    1 steel for the front fill 12157-10010
    2 Aluminum for the tranny 90430-18008
    2 Aluminum for the T Case 90430-18008
    2 steel for the rear 12157-10010

    So I'm missing 2 aluminum

    I'll probably do a DIY writeup on this since I can't find one for a 1st gen tacoma... A bit annoying if you're new to doing this.
     
  12. Nov 11, 2015 at 1:47 PM
    #12
    capetaco12

    capetaco12 .<>./

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    Changed my fluids numerous times never needed any new washers. Only one I ever needed was the oil pan.
     
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  13. Nov 11, 2015 at 1:55 PM
    #13
    bry838

    bry838 Well-Known Member

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    Ive also never needed a new washer after a fluid change. Done it many many times, on multiple vehicles never once have i had one not seal back up....
     
  14. Nov 12, 2015 at 9:00 AM
    #14
    ghs57

    ghs57 Well-Known Member

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    I did this (except for the tranny) on my 1st gen a few months ago, and am pretty sure I found a guide on this site. I only had trouble with the front allen plug, but eventually got it. I did new washers, but the old ones may have worked. I had no way of knowing if the fluids were ever changed because I bought from a dealer out of state, but at 150K+, they were not as bad as they could have been.
     
  15. Nov 12, 2015 at 9:55 AM
    #15
    Voyager

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    I would make sure the fill bolt breaks free before draining the fluid.

    A crush washer is cheap insurance...
     
  16. Nov 12, 2015 at 9:58 AM
    #16
    chowwwww

    chowwwww Well-Known Member

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    Is there a need for LSD Additive for rear non elocker diffs? Read somewhere that it is required. I added some in but wonder if I needed it or not and if not, is it bad to have it if I didn't need it?
     
  17. Nov 12, 2015 at 10:16 AM
    #17
    Digiratus

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    It will not hurt anything but you didn't need to add it either unless an aftermarket LSD type locker was added to your diff at some point. 1st gens never came with an LSD from the factory. The elocker isn't an LSD.
     
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  18. Nov 12, 2015 at 10:18 AM
    #18
    chowwwww

    chowwwww Well-Known Member

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    Thanks. Next diff fluid change I wont add it.
     

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