Originally Posted by zj98ny
hey guys sorry if im in the wrong section but i am having a major problem my 98zj had mud in the rear diff i had to do whole new bearings in the rear and my mechanic said my breather sucked in all the mud i also have noticed oil leaking out of the junction box and noticed the breather is ziptied into the junction box whole and i took it out and there is a straight hole going all the way through the junction box is there supposto be a hole all the way through? please help there is also no threads on the breather plug but inside the box there does not look like anything is supposed to be screwed in anyways please help
The junction box you speak of is called a "T" block. It is the union of the rear brake hose to the rear brake hard lines and also acts as the vent for the rear axle. The bolt that goes through the center of this block to the axle tube is the axle vent itself.
There should be a rubber hose or a breather cap on top of the "T" block bolt (which is hollow). If the cap or hose is missing then that is why you took on water. It is also possible the bolt is broken off flush with the axle tube which means it would have to be removed and a new bolt installed.
The zip tie you mentioned tells me that the "T" block bolt is either broken off or is missing entirely.