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Thread: Grinds with rolling 4wd activation

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    patriot Grinds with rolling 4wd activation

    I have a 2007 tundra 5.7 4x4. While the truck is rolling and I put into 4hi it grinds and then goes into 4hi. It drives fine once locked in. If I put it in 4hi with the truck stopped, it goes into 4hi perfectly without any noise. Can you help?

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    Default Re: Grinds with rolling 4wd activation

    Do you have different size tires on the front and back?

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    Default Re: Grinds with rolling 4wd activation

    Quote Originally Posted by tonyspin View Post
    Do you have different size tires on the front and back?
    Nope, The truck is bone stock

    Sent from my E6910 using Tapatalk

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    Default Re: Grinds with rolling 4wd activation

    Worn U-joints possibly? Maybe a trip to the dealer to check it out.

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    Default Re: Grinds with rolling 4wd activation

    How's the checking? High chance it is the same u-joint issue on buddy's 2004 Tundra 5.7.
    Last edited by trippinJ; 04-13-2020 at 03:56 PM.

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    Default Re: Grinds with rolling 4wd activation

    Would it be the front wheel bearings? Either one, I do believe there is a TSB for them TSB-0121-08. for the 07-08 4WD 3UR / 2UZ engines.
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