look what happened to me today
i dont believe so just some bolts holding it together, and yes the hubs if your using a Transfer case from an auto, i cant remeber it exactly but his truck wasnt staying locked in and when he would drive it, it would act like it was between 2wd and 4wd and start grinding and he ended up taking it to a trans shop and it was a detent ball and the hub in the transfer case



