transfer case "skipping and humming noise"
i have a 08 f350 with auto locking hubs (working great, more of to let u know what i have) and when i put the switch into 4hi with hubs locked or auto it seems like somethings catches and makes a little vibration in the floorboards. so i got fountain tire to take a look and they tracked it to the transfer case. they dropped fluid but there was no metal. they think theres a plate right behind the drain plug that could be blocking "bigger" chunks. so they put new stuff in and quoted me up to 3400 to send it out and do a rebuild. thats the most upper price, could be something small like a a gear or maybe a chain? i dont know if they use chains its just a guess. has anyone else had this issue and what part ended up malfunctioning? btw the 4x4 still works but i only use it if i have too. and no i didnt try 4lo yet but i should and see what happens. also is it a easy job to do a transfer case swap out myslef? im pretty mechanicly inclined and have basic tools. just need to know what a guy needs to do it like a gasket and oil if i just buy a used t case.