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Thread: Transmission Freezing in cold weather

  1. #1
    Senior Member ravengp's Avatar
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    Default Transmission Freezing in cold weather

    Hey guys! Been a while since I've been here, college is quite time consuming.

    Been having an issue with my Jeep. It's a 2001 TJ, 4cyl. I'm currently living in Western NY and it's been getting quite cold. A couple of times I've gone out there and the jeep would not come out of, or go into gear. In fact the gear shift would not move at all. After I let the jeep run a while (usually about 30 minutes or so) the transmission is fine. Any ideas about what could be going on?
    Just because the road stops doesn't mean you have to!

  2. #2
    Senior Member HillBillE's Avatar
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    Stick shift or auto?

    If it's a stick, switch to a lighter lube, preferrably synthetic.

    It's been -25 in the mornings here, when it's below zero, my CJ diff's and T-case would be nasty stiff from the 80W-90

    The 4 speed in the CJ uses Synchromesh, real thin oil, so it was OK, but the T-case and diffs weren't.

    Keep the JKU in the garage, so no problems there (garage is usually 15 to 20 degrees warmer than outside)

    Also, the PO used synthetic in everything (according to the reciepts I got with it)

    One trick is to put the T-case in Nuetral, and the trans in gear.

    This will warm the trans and T-case up faster, as the main shaft is spinning.

    It's best to park it like that (Trans in gear and T-case in Neutral) if you can.

    That way, when you fire it up, it's ready to warm up without having to force the shift stick.


    As long as the people remain armed,
    government knows that it cannot rule over the people by force.
    Those who stand in defiance of unconstitutional laws
    do so out of duty, honor, oath and love of country.


    "Certified Jeep Junky!"


  3. #3
    Senior Member ravengp's Avatar
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    It's a stick shift. Turns out that I had water in the fluid. I'm guessing, back in August when I got stuck in the river, water made it's way into the transmission. When I drained the fluid it looked like a chocolate milkshake. I put new fluid in and she's not freezing up anymore.
    Just because the road stops doesn't mean you have to!

  4. #4
    Senior Member HillBillE's Avatar
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    Oh yeah, that would do it! LOL


    As long as the people remain armed,
    government knows that it cannot rule over the people by force.
    Those who stand in defiance of unconstitutional laws
    do so out of duty, honor, oath and love of country.


    "Certified Jeep Junky!"


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