It's been cold today, and twice this morning I had to leave work. I left the Jeep in pt (we got four inches and roads hadn't been plowed) and both times the jeepwouldn't move and then kinda 'popped' and then moved. It's like something was froze and then started going. After that, its fine. No noises, shifting issues or anything. Just kinda strange...

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2005 4x4 Sport
Yakima Low Riders
Hidden Hitch
MOPAR tow hooks
RL Skink Step Sliders
Magnaflow
3/4 armored
235/70/16 Grabber AT 2
and a lot of little stuff...

Mine does that too sometimes and I have a 2WD. It only happens when it is cold. Typically overnight, but sometimes after sitting long enough for the engine and/or tranny to get cold. Then if I get in, start it, and throw it in gear immediately, it will not move and then pop into motion like you mentioned. I have found that if I give it an extra 10 seconds to get all the fluids pumping before putting it in gear, I never have a problem. My guess is that the ATF has drained down and has to be re-circulated before it will move...

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2007 Light Khaki 4x2 Sport
- Debadged - LTT CAI with Amsoil Filter - JVC HD Radio - Infinity BassLink
- Iggee Seat Covers - Black Moabs - 265/75-16 Cooper Discoverer ATP - 4.10's
- DIY Franky sitting at 23.75" - Al's 4.5 UCAs - Trimmed F&R Bumpers
- Removed Rear Sway Bar - Removed Rear Vibration Damper
- 75k miles so far...

Mostly likely water and slush freezing the brakes. Mine does that quite often in sloppy cold weather.... Once it breaks free it fine, right?

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Slightly modified Lt. Khaki 3.7 2004 LTD 4X4. Purchased new 8/6/03.
What I don't have....A Mag light mounted to my seat.
Original Old L.O.S.T. #000354

Nick's Pics & Mods click here: http://www.cardomain.com/ride/531173
http://www.survivaltopics.com/forums/

Mine happens when cold even in completely dry conditions.

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2007 Light Khaki 4x2 Sport
- Debadged - LTT CAI with Amsoil Filter - JVC HD Radio - Infinity BassLink
- Iggee Seat Covers - Black Moabs - 265/75-16 Cooper Discoverer ATP - 4.10's
- DIY Franky sitting at 23.75" - Al's 4.5 UCAs - Trimmed F&R Bumpers
- Removed Rear Sway Bar - Removed Rear Vibration Damper
- 75k miles so far...

yeah it's fine.
and it did rain alot yesterday and of course I played a bunch last night and this morning in the snow, so I am sure it was prob moisture on the breaks..

_________________
2005 4x4 Sport
Yakima Low Riders
Hidden Hitch
MOPAR tow hooks
RL Skink Step Sliders
Magnaflow
3/4 armored
235/70/16 Grabber AT 2
and a lot of little stuff...