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  1. #1
    Baja
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    Question So...exactly how much atf +6 should the transfer case have in it lol?


    The early 2006-2007 H3 have a rather cryptic and spooky phrase about the fill plug being to low when manufactured and it'll damage it blah, blah...
    So, there in lies the question... My 2007 H3 had the fluid changed (by lil ol me) several weeks ago, say 2 mons. easy but this cryptic message in the book and on the web has me bothered. I used 1 qt. + .75 qt. Taking into account a few ounces in the pump and seepage I got at least 1.5 qt. or more in there. But is the drain hole to low from the get go?

    It has me bugged. I'm seriously contemplating lifting the back end a few inches and pumping in another 4-8 oz.
    Just feel really uncomfortable with the current amount..

  2. #2
    Super Swamper
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    I recall hearing something about adding additional fluid through the VSS hole. Might also be able to add more via the vent hose. This would take hours, and probably require you to rig up a temporary funnel feed. Pour the additional fluid into the funnel and leave to slowly drain overnight.

    For what it’s worth…I’ve never been able to get two full quarts into ANY H3 t-case.

  3. #3
    El Diablo
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    The transfer case takes 1.6 qts. Here's how you know which transfer case you have. https://www.hummer4x4offroad.com/for...e-Fluid-Change

  4. #4
    Baja
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    Yep 1.6 that is not in question. The fill plug being correct is though. If it is designed by Gm to low to begin with or is it correct? That's the question...
    Because if it's not the right placement then why the "add through vss hole"?

  5. #5
    El Diablo
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    Did you read the other thread? Kinda why I posted it. Post #3. Early transfer cases were not properly designed and could not be filled properly unless you added fluid through the speed sensor hole. Later transfer cases could be filled properly just by using the normal fill hole.

  6. #6
    Baja
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    Yes sir. See my manual came with the statement in the pages lol. It's an earlier 2007 build. That's why I asked. But hey I'm going to verify it because a T case damaged would be a very undesirable thing.

  7. #7
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    Whatever you do, change it at least once a year. It get's real dirty.
    2009 H3T Alpha/Adventure/Lux
    1995 XJ

  8. #8
    Baja
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    So, this Saturday past I took time to check it on flat ground and added approximately 8oz of atf6. I'm glad I checked.

  9. #9
    Bald Tire
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    4Speed is correct, You need to remove the VSS once you topped off the Transfer Case itself and add additional fluid. There should be a sticker on your Transfer Case telling you this and how much to add.
    If memory serves, it applies to 06-07. The later models did away with the need to remove the VSS I believe, at least that's what I recall. I just did my 06 and removing the VSS was required.

  10. #10
    Super Swamper
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    To make it easier to fill the t-case (and other similarly hard to get to parts) go get yourself a cheap 1 or 2 gallon garden sprayer (the kind with the hose and wand) and just take the wand off the hose. Now you have a pressurized vessel with fill tube. Pour fluid into the sprayer (can even pre-measure to make sure you're putting in the right amount), put the hose in the fill hole, and start pumping up the tank to force the fluid in. Much easier than trying to either pour it in or use a hand pump.
    2008 H3 Alpha

    "Live free or die: Death is not the worst of evils." - General John Stark

    N1JPA

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  12. #11
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    I always fill t-cases on the workbench before I put em back in the truck.

  13. #12
    Super Swamper
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    Quote Originally Posted by 4speedfunk View Post
    I always fill t-cases on the workbench before I put em back in the truck.
    While this is definitely the easiest time to fill anything, I really don't recommend pulling your tcase every time you need to change the fluid. Unless you're a masochist, then feel free.
    2008 H3 Alpha

    "Live free or die: Death is not the worst of evils." - General John Stark

    N1JPA

  14. #13
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    Question guys, Dexron 3 will is a real problem to find here for the T case. Is there another one i can take for it?


    God did build all the mountains for Hummers

    H3 3.5 2006, manual transmission adventure pac with 4.1 Low gear, UPC, PCM of NC tune + Power chip, 2,5" lift front and 1.5" rear, Bilsteins 5100 with extended Bumpstops, 315/75R15 Cooper STT Pro , snorkel under hood.

  15. #14
    Hammer Down!
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    Dexron VI.

    Sent from my moto z4 using Tapatalk
    “Life's hard. It's even harder when you're stupid.”
    John Wayne


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    H3Hummer (12-13-2021)

  17. #15
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    Dex VI. It works for anything GM. (Great on a salad too).


 

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