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2HI to 4HI grind

Discussion in '2nd Gen Tundras (2007-2013)' started by Fundra3649, Feb 11, 2020.

  1. Feb 11, 2020 at 4:28 AM
    #1
    Fundra3649

    Fundra3649 [OP] New Member

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    I am in need of help. I have 2007 5.7 SR5 4x4. When I shift into 4HI it grinds around the transfer case until the 4x4 engages. There are no flashing lights on the dash. It drives fine in 4HI. When I shift back to 2HI there is a droning/vibration sound at slower speeds that can be felt a little in the steering wheel and in the floor boards around me feet. It grinds every time I try to put it into 4 HI. It only grinds into 4HI while moving. When I actuate the 4x4 with the truck stopped, the 4x4 engages perfectly. Any suggestions?
     
  2. Feb 11, 2020 at 4:35 AM
    #2
    timsp8

    timsp8 Member

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    Have you changed your transfer case fluid?
     
    15whtrd likes this.
  3. Feb 12, 2020 at 11:18 AM
    #3
    bleach

    bleach Resident WISEGUY

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    Do you make sure you have stopped and shifted into N before shifting into and out of 4L?
     
  4. Feb 14, 2020 at 7:21 AM
    #4
    Fundra3649

    Fundra3649 [OP] New Member

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    I have not checked that yet as I have been very busy with work and kids. I will check that. Is it just a fill hole on top and dump on the bottom?
     
  5. Feb 14, 2020 at 7:22 AM
    #5
    Fundra3649

    Fundra3649 [OP] New Member

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    Yes I always do so if I use 4LO whick may be once a year. My issue is going into 4HI while moving. Under 50 MPH of course. I never shift info 4HI over 20 MPH.
     
  6. Feb 14, 2020 at 8:59 AM
    #6
    bleach

    bleach Resident WISEGUY

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  7. Feb 14, 2020 at 9:16 AM
    #7
    Fundra3649

    Fundra3649 [OP] New Member

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  8. Feb 14, 2020 at 9:16 AM
    #8
    timsp8

    timsp8 Member

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    I believe so but haven’t ever changed mine myself. I think there is a how to thread on here about it. Or maybe a YouTube video. I’m pretty sure it’s fairly easy to do in your driveway.
     

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