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GEAR OIL GR5 on syncros

Discussion in '2nd Gen. Tacomas (2005-2015)' started by kauai808boy, Apr 21, 2011.

  1. Apr 21, 2011 at 4:33 AM
    #1
    kauai808boy

    kauai808boy [OP] Active Member

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    so i have a quick question i heard this from 2 people so far that gear oil that has gr5 in it slowly deteriorate syncros and causes gear problems over time and that using gr4 would not cause this.

    does anyone have input on how true this is?
     
  2. Apr 21, 2011 at 4:48 AM
    #2
    skytower

    skytower Well-Known Member

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    It's GL, and there is a differance. GL-5 contains sulfur and is superior to GL-4 in shear stregnth. Unfortunately, sulfur attacks yellow metals. If your trans calls for GL-4 and not GL-5, do not use GL-5. Mine can use either.
     
  3. Apr 21, 2011 at 4:50 AM
    #3
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    I've heard the same thing, but I think you mean GL. There is an additive that eats copper in the GL-5 oil (supposedly). BUT as you said, it is a long term effect and not something that happens overnight.
     
  4. Apr 21, 2011 at 4:52 AM
    #4
    kauai808boy

    kauai808boy [OP] Active Member

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    GL sorry about that thanks for the info much appreciated
     
  5. Apr 21, 2011 at 4:56 AM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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  6. May 14, 2011 at 1:36 PM
    #6
    Tylerm5000

    Tylerm5000 Well-Known Member

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    Redline MT-90 is a nice gear oil for the Tacoma. It has been great. Smooth shifting.
     
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