I have no first hand experience with the strength of these axles, I probably barely even classify as a wheeler lol. I just like to build ***. Originally was gonna do a hp44/60 outers and the weak link be the pinion, but then these axles came out. That's how long I've been "working" on this lol. They're just interesting to me, massive chode of a pinion vs a D44, inner pinion bearing and ring gear side carrier bearing are .5" larger OD vs a D44, and the super low hypoid offset vs anything else out there were all selling points for me. My rear pinion with an M220 will be .75" higher vs my current 8.8, my TJ is my DD and my rear DC driveshaft operates at 21-22, so it lives for about a year before the DC joint is absolutely worn out.
I was lucky to snag the old currie aluminum knuckles for $300 for the pair, so definitely gonna use those and make the rear m220 full float to have 99-04 UB on all corners. It's also a stock wheelbase TJ with an emphasis on up travel, so I didn't want to deal with shoving a D60 center between the frame and the motor at full bump. I removed the tubes from my front m210 center and will be pressing in some slugs, then returning to 3.5" axle tubes.
Not really planning on more than 35s, so I don't need the massive centers, but I want the 99-04 outers for longevity since I do 10-15k miles a year. And 45* steering.
Wanted to possibly use the factory lockers, but the cross pin design needs to be addressed and there's not much meat left to EDM to the side gears to 35 spline, plus I got quoted $600 for the EDM work. Cross pin wouldn't be too bad to upgrade, but I also don't like the super small thrust bearing washer on one of the side gears, seems like a lot less surface area vs a normal thrust bearing in any other diff and I don't want to be rebuilding a diff because of a stupid thrust bearing after 20-50k miles. Pretty sure I have pics of all that in my other thread. I'm just gonna shell out for the 35 spline ARB's