Our trucks don't have a "mechanical" limited slip differential. They use computer controlled braking to brake the wheel that's spinning and shoot some juice to the one that's not. In 4HI we have brake controlled LSD. In 4Low we have nothing. Open dif. We do YWM so we can have that brake controlled LSD in 4Low. Soooo doing YWM and then activating ABS kill sw basically puts it back to factory conditions in 4 Low.
I am not done with this as I too would like to have ABS off and YWM functional. There must be a way, but so far no.
I wouldn't be as concerned about having ABS kick-in in 4LO esp. since it is needed to make TRAC function, but it would be nice to kill-it in 2HI & 4HI.
I am still going to attempt both mods tonight, but if I have to choose one over the other, it's gonna be YWM for sure.