1leg said:
Personally I have never seen a broken axel or axel housing in person. But I have seen a few pics on the forums and all of them were Rubicans, In my opinon if you stay 33 and smaller on the tires you don't need the 44 in the front. Lookers are nice but ask Gear he almost never turns them on untill he gets in the really nasty stuff. And a lot of time I have followed him with only LSD in the rear. The 4.11 gears that come with the Rubican will not cut it with 33s no matter what direction you go you will want 4.88 or 5.13s. I have 4.11 in my 07 X 2dr and no way is it getting the job done. And I don't pull a trailer. If you think you need a 44 in front buy a new rubican front axel for ~1800 and save yourself some $$ by installing it yourself.
An X was built for what you want to do.
A Rubican was built,,, for the Rubican,
I'm not sure I agree with 1Leg here on the gearing issue, but maybe its the difference in the new motor used in the JK that makes regearing so mandatory? I have a 2005 Rubicon Unlimited (the two door LJ body style) and it has a 4.5" lift, 35" tires, and the stock 4:10 gearing. It's not a speed demon, but drives fairly well, and certainly handles high freeway speeds quite adequately (regularly 75-80ish). It has been wheeled extensively and almost 100% exclusively, and the gearing has proven not been an issue.
I have been with many other Jeeps now over the past year and have seen as many as a dozen Dana 30 and 35's snap an axle on mild obstacles WITHOUT the typical "mash the throttle" provocation one would expect, typically with 33" tires.
Regarding the new JK, I have rented a 2 door X (once) and the 2 door Rubicon in Moab (three times), and they are running completely stock, on the 32" Goodyear MTR tires, and they did awesome. I don't think an X could do the same as easily. The lockers are such a tremendous aide and are much better for the preservation of the trail also.
Here is the X, stuck, even with traction control (the hill is steeper than it looks):
Stuck again, only slightly cross axled, but one wheel in the air and unlocked.
Various Moab shots in the stock Rubi:
As for lifts, the new JK can accommodate massive tires with a minor 2.5" lift. Case in point (37" military tires):
One thing to watch out for with the JK's, is a weak weld for the steering tierod to the axle housing. I have seen several of these break. Here is one being field welded on a JK 2 door with 33" AT tires: