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Thread: Where would be the ultimate location for axles/transfer case/transmission vents ?

  1. #1
    Join Date
    Dec 2009
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    Alberta, Canada
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    Default Where would be the ultimate location for axles/transfer case/transmission vents ?

    I'll be relocating the vents (some day) on my vehicle and I ask myself; "Where would be the ultimate area of the vehicle to relocate them to ?"

    So here are my ideas;

    1. Move the front ones (front axle/transfer case/transmission) to the firewall as high as possible in the engine compartment, and the rear axle vent to the gas filler door. (Seems like a good idea but could be higher in my opinion.)

    2. Move the front ones outside the vehicle near the common snorkel inlet location (in a little covered but not sealed box to protect from the rain hehe) and the rear axle vent to one of the rear roof corners.

    3. Or extend all the lines and move them inside the cab as high and rearward as possible. (Could work but I'm thinking of the smell and possibilities of leakage if the vehicle is rolled, so not that much of a good idea. )


    Any ideas or thoughts ? Where did you relocate yours ?

    Thank you.
    J-S
    1999 GMC Yukon SLT. Build thread here.
    Going against the grain...

  2. #2
    Join Date
    Jan 2007
    Location
    AVL, NC
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    3,118
    As high as possible! It really depends on how much water you plan to cross.

    I have my front vents at the top of my firewall. If I get into water deeper than that, I have some serious issues to work out.
    Chris Steuber
    02 E350 7.3 V4
    11 E350 5.4 V5
    99 E36 M3 (LS swap coming soon)
    www.ujointoffroad.com
    4x4 Van Conversions

  3. #3
    Join Date
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    Quote Originally Posted by ujoint View Post
    As high as possible! It really depends on how much water you plan to cross.
    Thanks for the input ! It would act more like an insurance policy, just in case a dip or hole in the riverbed wasn't seen during reconnaissance.

    After some more research I found this out; http://www.4crawler.com/4x4/CheapTri...html#Breathers

    The third paragraph below the taillight picture, it says what happens if the vents are too high.
    J-S
    1999 GMC Yukon SLT. Build thread here.
    Going against the grain...

  4. #4
    Join Date
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    Texas Gulf Coast
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    I'm thinking that if the oil got that high, it (rearend) was way over filled.
    04 TJ Unlimited / Mobile Doo-Dad display
    KE5PPH

  5. #5
    Join Date
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    Location
    Tigard/Corvallis, Oregon
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    Diffs will usually puke to get down to the correct level if they are over filled.
    Stephen - KE7BKG

    1997 Toyota 4Runner | 1991 Toyota 4Runner | 1986 Toyota Corolla AE86

  6. #6
    Join Date
    Jun 2008
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    Currently: Fairbanks,Ak
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    I put the rear one behind the top of the tail light. Lots of room, up high, and the paint was really clean (less dust).

  7. #7
    At least as high as the breather box in front..

    As high as you can get the rear.. Maybe above the fuel tank..

    If you're anal about dust, slap one of these on the end of the lines.. $10 or so each..



    http://www.amazon.com/Spectre-3996-C.../dp/B00062ZI86
    --
    Rob Duncan
    Memphis, TN

  8. #8
    Join Date
    Dec 2009
    Location
    Alberta, Canada
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    Thanks for the replies. I have seen those vents that look very trick, I might go with those. http://www.northeastxt.com/vent.html

    I'll probably go with option #1, as it seems to be the most common and trail-tested alternative.
    J-S
    1999 GMC Yukon SLT. Build thread here.
    Going against the grain...

  9. #9
    Join Date
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    938
    Quote Originally Posted by Jean-Seb View Post
    3. Or extend all the lines and move them inside the cab as high and rearward as possible. (Could work but I'm thinking of the smell and possibilities of leakage if the vehicle is rolled, so not that much of a good idea. )
    if you roll your vehicle, a dribble of gear oil on the headliner will be the least of our worries.
    '08 Range Rover Supercharged - work in progress
    '00 R50 Pathfinder - low and locked
    '85 Ford Wrangler CJ7 - 351 and 9in axles

  10. #10
    Join Date
    Dec 2009
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    Quote Originally Posted by alexrex20 View Post
    if you roll your vehicle, a dribble of gear oil on the headliner will be the least of our worries.
    True.

    I was more worried about major spills.
    J-S
    1999 GMC Yukon SLT. Build thread here.
    Going against the grain...

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