To
@Eddie Greenlee, in answer to your question directly:
NO & YES.
NO,
I did not go with another SYE,
I went with an Atlas II 4.3:1 twin stick transfer case instead of doing the wide chain, 6 pinion planetary gear & SS SYE kit on the 231J that came out of my Jeep. I had already bought the TeraFlex 4444400 SS SYE kit for the 231J and a Tera 2-LOW for 2WD low range kit for a Ruby RockTrack 241OR prior to finding a deal on an almost brand new Atlas. I wasn't sure if I was going with the Rubicon 241OR or rebuild and upgrade to my 231J hence the different parts. This is why I am selling BOTH the Tera 2-LOW for Rubicon NVG-241OR Rock-Track AND the 4444400 TeraFlex SS SYE kits NIB unused brand new in the packaging. The Atlas II has made them not needed at this point.
YES,
I do like the TeraFlex SS SYE better than the AA because it allows you to have even a longer drive shaft by almost 4" out back where the TJ really needs it. The electronic speedo sensor is also IMHO a better deal because instead of trying to match a speedo gear for your tire size, you just use an electronic "plug-in" calibrator that can be changed any time tire size is changed without any tail cone removal or speedo sensor removal. Also there's no way to " clock the speedo gear wrong" since it's a hall effect sensor using magnetic pulses from a tone ring like GM and the Rubicon Jeeps did it. The speedo will always work. It's the way all 2003+ TJ/LJ's went that have the RockTrack 241OR Rubicon transfer cases in them so it is a factory sensor if you ever needed a replacement while out on the trail. No special sensor, regular 2003-2006 Rubicon speedometer sensor is what this kit uses.
As far as kits go, it's a tossup id say between the newer improved gen-2 TeraFlex SS SYE and the JB Conversions SS SYE. They both are about the same in design but the Tera is about $50 less money. The casting on the JB tail cone is a bit thicker at the bearing and seal area, Both have ample lubrication holes in the tone ring for the rear support bearing to get the required "splash" lubrication while towing and driving. Both use the newer hall effect speedo sensor that is a factory part on Rubicon TJ's, Both are the same length and upgrade the rear output shaft to a much beefier 32 splines, (same as 3/4 & 1-ton truck transfer cases use). Tera is easier to get hold of for technical questions than JB but JB makes superior 4:1 gear sets for Dana 300's etc. You really can't go wrong with either manufacturer. This is strait talk, not BS hearsay, I've used both in the past on other Jeeps.