i find this to be very far from the truth and love my 4:1. thats like saying that anything over 4.10 gears is a waste
upgrading the 231 would cost more than its worth and add more issues down the road
Maybe for the automatics it works well, but I have a 6 speed manual and 4.88's on 33's with lightweight 35's on deck(that are lighter than most 33x12.5's).
The 231 built up is plenty stout for 35's and its lightweight and nice and compact too.
And if you do the math the 231 with a 6 speed in 1st in LO is in that sweet spot where the reduction is basically in the middle of 4:1 and 2.73 on 1st for the older 5 speed manuals or automatics. Low enough for serious rock crawling if needed, but not so low where it becomes nearly worthless for regular mudding and trail riding. Works out nicely.
Take your ride: 4.10's and a 42rle transmission and the 241 TC case with 4:1. That would put your crawl ratio at around 47:1 right? With my 6 speed, HD 231(2.72:1), and 4.88's Im at 60:1 crawl ratio. Even when you go to 5.13's your still a bit less at around 58:1 ratio.
So upgrading to a 241 is not necessarily an upgrade at all in reality. In fact depending on wheeling habits, transmission installed and axle ratio, it could be the opposite, unless you want to look at it from a $$$ standpoint. For me upgrading my 231 made ALOT more sense for me. The 241 would have been a complete waste. It would have made my wallet much lighter, and added unnecessary bulk and even a bit more weight in the process. For some people the 241 would make sense, for others not necessarily.
In fact for the price of 1 used 241TC I can have 2 built up 231's and plenty of money left over.