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  1. #1
    Bald Tire
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    Hummer H 3 4 x 4 won't engage....help! Please

    Light just blinks for a few seconds then reverts to the regular 4 x 4 setting. So embarrassing....had a Ford, Dodge and and a front loader haul me out of the snow 4 times this winter!

  2. #2
    All Terrain
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    Shift fork inside the transfer case likely worn. Cheap part if you can do the repair yourself.

  3. #3
    Bogger
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    When you were trying to engage the 4x4 did you have the car in neutral or were u in drive?
    2008 H3 3.7 Adventure Package.

    35's BFG K02's, T bar crank.

  4. #4
    Bald Tire
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    Hummer 4WD won't engage

    Quote Originally Posted by CaseyS View Post
    Shift fork inside the transfer case likely worn. Cheap part if you can do the repair yourself.
    Thank you! I'll have to go to garage and it is helpful to have an idea about what is going on.

  5. #5
    Bald Tire
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    Quote Originally Posted by Kyle View Post
    When you were trying to engage the 4x4 did you have the car in neutral or were u in drive?
    Neutral

  6. #6
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    The same problem happened to my 07 I5 and it was a bad encoder motor. The motor was seized up so the shift fork never moved.
    The shift fork is said to be a weak point of the transfer case, but if it's just blinking and returning then I would not expect the shift fork to be the problem.
    Easiest solution, you have a stuck selector button on the dash. First bump and jiggle each of the buttons and see if any are stuck down.
    Next, you can check for other things.
    The transfer case is a 'dumb' system in the way that it doesn't actually just what gear it is in, it only knows what position the motor says it's in. In my case, because the motor wasn't moving, the gear was never shifting.
    If you had a case where your car is telling you that it's going in 4LO but it doesn't feel any different, then there is probably a problem with the shifting fork, or at least somewhere inside the transfer case.
    Here's the post where I talk about it more.
    http://www.hummer4x4offroad.com/foru...757#post204757
    In summary, you can test the motor yourself if you have a 10mm socket and wrench, it's very easy to remove, inspect, and reinstall.
    Just pull off the four bolts and see if it is rotating when you hit the dash button.
    The replacement encoder part number is GM 89059688, at least on my 07.

    Let us know what you find!

  7. #7
    Bald Tire
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    Burter: Thank you....thank you!

  8. #8
    All Terrain
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    Most here probably know this, It's a good idea to shift in to 4 high and 4 low at least once or twice a month to keep every thing working. When ever I hit a dirt road I will engage 4 high and drive a mile or 2 then stop and put in 4 low and drive a block or 2 . This should minimize a surprize later when you really need it.
    Just my 2 cents.


 

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  1. 4x4 will not engage
    By scott in forum HUMMER H2 2003-2009
    Replies: 6
    Last Post: 02-14-2017, 07:04 PM

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