warn hubs for dana 60

[sledhed99]

to my understanding the for dually have a dana 60 frontend. I was experincing some front end noise, tried to narrow it down by unlocking the hub and then removing them all together. That is the only way that I can get the noise to go away. Warn says that their aftermarket hubs don't work on dually's. Can anyone tell me why? I thought the noise might be tourington berring or hubs not unlocking all the way or one in and one out? The truck is a 99