Inaccurate info in the first post, IMHO. While IFS does have issues with weak CVs, there is no reason not to run a locker if you have any semblance of knowing how to wheel your rig and keep it together.

In fact. I would argue that most fully locked IFS rigs have half the breakage of those just locked in the rear... The lockers allow you to crawl most obstacles and go much slower and controlled (the fast as necessary ends up being not very fast) . Shock loads break parts, period.... Have you watched the stress that brake activated limited slip (like ATRAC) can put on the CVs...?

Even the old first gen 4runners do pretty good with IFS and lockers. The CVs in those old trucks are weak, but the rest of it holds together pretty good since they are so light. I have friends who beat the heck out of their first gens with lockers. CVs break here and there and are clearly the weak link, but besides that they work. Same with all the other generations.

The 4th and 5th gens have an 8" ring gear that is pretty stout.. It compares well with the high pinion 8" from the 80 series although obviously not in a solid axle housing. I think the carrier barring is actually the same.