1998 Jeep Grand Cherokee Axel

[Jimboemt]

I am working on my daughter's 1998 Jeep Grand Cherokee. The rear end was making a growling noise, it has been pulled apart and bearings and clutch pack in the diff has been replaced. I am in the process on cleaning the axel tubes can I can put it back together again and have noticed a small round metal piece in the top of the tube about 3/4 of the way down on the top of the lt tube. I have been told there isn't supposed to be anything in the tube. Someone else told me it could be a vent. it's a Dana 44 HD, any help would be greatly appreciated

[IntrepidXJ]

It's a vent....there is usually a hose attached to it on the outside so that water won't get in

[DOSS]

I second Intrepidxj.. tis a vent.. if there isn't a hose attached to it.. get one attached to it and route it up as high as you can so you don't suck water into the axle :)

[Sandstone Addiction]

What was the condition of the gear lube when you drained it? Was it clear or milky white? Was there any metal filings in the bottom of the case?

[JP]

Like everyone said, it's a vent tube. There should be a rubber hose that was connected to it and should be run up towards the floor of the ZJ. It will have a plastic valve at the end. If there is no rubber tube attached to it, it is possible water can get in there and become a problem. Easy fix, just grab the correct diameter tube and extend it up and away.