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Rear Locking Diff Question

Discussion in '1st Gen. Tacomas (1995-2004)' started by butchmv93, Mar 29, 2009.

  1. Mar 29, 2009 at 12:20 PM
    #1
    butchmv93

    butchmv93 [OP] New Member

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    Rear Locking Diff Question:

    I just bought a 2000 Tacoma TRD 4x4, when I push the "RR Diff Lock" button, it just flashes Red on the cluster "RR Diff Lock", but I don't think it is actually engaging. Any suggestions, also it looks like it has a very slow drip from the differential case, could it be low on oil?
     
  2. Mar 29, 2009 at 12:24 PM
    #2
    TRD4x4858

    TRD4x4858 Taco Traitor!

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    4x4's only engage the rear locker in 4lo, anytime you have a leak its a good idea to check the fluid level. There is a mod to make the locker engage in 2wd like the prerunners, its under the mods and tutorials section
     
  3. Mar 29, 2009 at 12:28 PM
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    butchmv93

    butchmv93 [OP] New Member

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    Thank you,

    Wow, so the diff lock button only works in 4wd lo? That's nuts! So the only way I could lock it in 2wd is by doing a mod?
     
  4. Mar 29, 2009 at 12:36 PM
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    TRD4x4858

    TRD4x4858 Taco Traitor!

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  5. Mar 29, 2009 at 12:41 PM
    #5
    butchmv93

    butchmv93 [OP] New Member

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    Thank you so much,

    Last question, what oil type/weight should I put in the rear diff? Any preferences?
     
  6. Mar 29, 2009 at 12:48 PM
    #6
    TRD4x4858

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    According to the manual its either SAE 90 or SAE 80 or SAE 80w90
    I usually get the cheap stuff since i dont tow anything so no real need for the expensive oil
     
  7. Mar 29, 2009 at 12:51 PM
    #7
    kws129

    kws129 Well-Known Member

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    I would suggest using synthetic. Amsoil 75W90 or 80W90, I forget what weight toyota recommends. At one time I had changes all the drivetrain fluids, front and rear diff, manual trans and transfer case on my 2000 tacoma and it made a difference. I picked up a mile per gallon or two and much smoother shifting. One other good thing is it's good for 100,000 miles or so
     
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