There are vucumm hoses on the front driff and there is one on top (front) of the transfer case. (i found that one last nite) and i think there is one on the rear diff too.
That elctromagnet one... i read last night what it does and my brain just is not retaining the info...
I not sure if the front diff hose goes to the manifold or not, i will take a photo later today of what i thought were the out let for the hoses...