700R4 all the way. I know someone who can build them to hold up behind a big block on the drag strip. My son has one of his in a 3900 lb ElCamino running high 11's on slicks. PM me if you want his contact information.
I am not trying to change any plans but when I did the Rubicon with a group of Cruiser folks in 2001 we spent the first night at the Ice House Resort then got on the trail early. There was a fee to do that but they did allow some of the people to leave their tow rigs there, I am sure there was...
What you are experiencing is the 4th (OD) gear Sprag clutch, not the converter unlocking and this is normal operation for a 700R4. If you pull it down into 3rd gear you will fill some compression slow down but 4th will free-wheel.
When you say “drop out of overdrive”, did it down shift to 3rd or just coast?
If it coasts in OD that is normal.
If it downshifts to 3rd that is not normal.
If you are bored and have a little time to kill here is a link to some others that are doing the Rubicon next month. If you read between the chit-chat it gives you a little insight.
http://www.jk-forum.com/norcal-77/rubicon-trip-july-9-12-a-235573/
I found some information about camping at Rubicon Springs, http://www.delalbright.com/rubicon/springs.htm#Anchor-Mar-32949
There is a lot of information on this site about the trail.
More information on fire permits...
If you can only put a locker in one axle do the rear. I have lockers front and rear and very seldom use the front. With the front locked they just don't steer so you are always unlocking it. As for when you need a locker the most it is in high flex situations when one tire unloads you stop...
Steve, My son and I are looking into joining you on this one. I did the Rubiicon as a spotter about 10 years ago and this is one that I have wanted to take my so on.
I did my floor with an epoxy from Valley Paint Manufacturing in West Bountiful, it turned out great. They will mix it in any color you want and they are great to deal with.
The parts are off of a 2003 TJ, front and rear bumpers, front track bar. All in good conditon and the price is right - free, call Lane at 801 557-6233.
Jeep JK Rubicon Rock Rails off of a 2008 4 door, excellent condition, no scratches or dings. $150 OBO. Located in Centerville, call Lane at 801 557-6233.