rear end leaking out of vent tube while driving on 2000 Dodge Durango

I have had the rear end pulled apart by 2 drifferent mech and they could not find anything even changed to synthic diff fluid to stop foaming, bearing are good,seals are not leaking

Asked by for the 2000 Dodge Durango
are they over filling it?
3 more answers , 3 more comments
are they over filling it?
Are they using chrysler synthetic with 2 containers of 'friction modifier'?
good one ziptie.
You are using drifferent mechanics...I would find myself a differential mechanic.
I talked to a differential mechanic and he wanted to move the vent closer to the wheels
Why not find the cause and fix it right? Factory fill on them IS synthetic WITH 2 bottles of their 'friction modifier' If it had regular gear oil in it then that should be flushed out.