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Smell of gear oil coming from shifter boots.

Discussion in '1st Gen. Tacomas (1995-2004)' started by bloated_possum, May 24, 2010.

  1. May 24, 2010 at 5:58 PM
    #1
    bloated_possum

    bloated_possum [OP] Member

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    2004 5-speed 4-cyl. Tacoma. Is this something that I need to be concerned about? I changed out the oil in the tranny and transfer case this past fall. When it started to get really hot here a month or so ago, I started smelling gear oil. I searched every inch of the drive train and there are absolutely no leaks. I then just did the ole fashioned sniff test and started literally sniffing to see where the smell was coming from. It looks (or smells rather) like to me that it is coming from the transfer case boot. I took the boots off and there is nothing leaking around the shift levers either. But the smell is very obviously coming from the transfer case shifter. Lube levels are good and the gear oil only has about 5,000 very easy miles on it. Any ideas why this would be happening all of a sudden? Is there maybe a seal in the transfer case "shifting" mechanism that is no longer "sealed"? Thanks for any help.
     
  2. May 25, 2010 at 6:13 AM
    #2
    Space Wrangler

    Space Wrangler Well-Known Member

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    04 Tacoma 4x4 Double Cab SAW 2.0's Alcan's Ion 171 wheels 15x8 (-27mm bs) 32" BFG AT's
    i had the same issue on my 03, which was a 5 speed.

    i found that the fumes from the tranny/xfer case were entering the cab through the shifter boot.

    my quick-fix was to extend the breather/vent further towards the back of the truck with the leftover fuel line from when i did my diff. vent extension. ..worked like a charm.
     
  3. Jun 7, 2010 at 9:06 AM
    #3
    Yamasaki

    Yamasaki Yamaha + Kawasaki!

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    Thread revival!

    I'm having this same issue on my 2003 w/ 5 speed. I changed out the xfer case/tranny/both diffs and occasionally I get the strongest smell of gear oil in my cab. Nothing appears to be leaking.. Is it common for the smell to permeate up through the shift boot? Is the transmission breather right there under the boot?

    Is there a link as to how I can address this. The smell is driving me nuts. Thanks.
     
  4. Jun 8, 2010 at 5:25 AM
    #4
    BRP27

    BRP27 When I grow up I want to be just like Me

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    So far south in Texas my feet are in salt water
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    3 in Ultimate ToyTec, set @ 2.5 in. AAL PINCH Weld Mod ( beat the pinch weld over inside the fender) Painted the pinch weld on bottom of cab Black Hi Lift Knock off
  5. Jun 8, 2010 at 8:37 AM
    #5
    Yamasaki

    Yamasaki Yamaha + Kawasaki!

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    ^ That was the exact post I was looking for. I searched too and could not find that that one. Thanks!
     
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