Front differential questions

[code.mafia]

I noticed that the vent hose on top of the diff had broken and was just dangling so its getting dust, dirt and water in there. I'm going to drain it and fill with fresh tomorrow and replace that hose.

On the other end of the hose, where it's attached to the frame, I can see something inside of it, like a white piece of plastic, but nothing sticking out past the end. Is that supposed to be some sort of vent valve that's maybe broken off or is it supposed to look like a white plastic plug stuffed in the end of the hose?

Does the diff cover use a gasket?

What's the best fluid to put back in it?

Does it need any type of friction modifier added?

[code.mafia]

Anyone?...anyone?...bueller?...bueller?

[code.mafia]

[mattdoxa]

im not much help but i use rtv sealer there was never a gasket on mine. thats about all the info i can give you

[DevilDocTater]

They make a gasket for the rear diff, you can get it at any parts store. The white piece is a one way valve i believe.

[NYC F-350]

80W-90 Gear oil, no friction modifier since that is used for limited slip differentials and the front is an open diff.

No gasket, just use RTV

That thing is a one-way vent valve to keep water out

[code.mafia]

Yea, I never got any answers quick enough so I used RTV. Parts store said 'straight 90W' but they didn't have any. I used Castrol Syntec 75w-90.

The white plastic thing disintegrated when I tried to get it out, like powder. So I replaced the hose and it's pointed down in that clip on the frame rail which should be fine as long as I stay out of deep water till I get a replacement valve.

[bfrank81]

Next time check out Lube Locker

I just decided to go back with the RTV but it's an option.