i like IRO, I have their y link front long arm kit. I have sleeved my diff years ago, im not sure what brand and I had some1 else do the welding. i used IRO c gussets that i had from ages ago but hadn't fitted, i cant remember if i had to heat up the C before welding, but mine all turned out ok. make sure you strip back the c before welding, i didn't properly and the welds starteted out shitty.
with sleeve, truss, c gusets, ARB locker(i havnt had a problem with) 4.56 gears and RCV axles, i think i have just about maxed the d30 for strength, im planning to run 35s on my xj, but i did run 37s before the truss and gussets with no breaks.
i have bent an inner c on 31s before
![Sad](http://www.ausjeepoffroad.com/forum/images/smiles/icon_sad.gif)
im not sure what happened, but the ball joint and axle broke and the whole out C and wheel came off...