What would cause my front hub to leak?

So what would cause this? Do I need new hub seals or just a new stemco seal? This is in passenger side. Driver side is dry and doesn't fling oil like passenger side does. Thoughts? Just looking at what I need to fix and replace. I haven't taken it apart yet as this just started happening.

 

Just try a new plug for now. They do get hard after a while and will also cause seepage like that. Make sure it isn't over full. Keep an eye on it.

 

ok I keep an eye on the fluid since it started leaking and keep it topped off as needed.

 

Hard to say from just a picture. It could be that it just needs a new rubber plug, they get hard over time, if you can spin it easy, get a new rubber plug for a few bucks. Bearings running hot can make them seep from extreme hot cold cycles pushing air in and out of the little vent hole in the middle. Jack it up and check bearing adjustment and make sure that it spins smoothly with no noise.

 

Cool appreciate that info as well.

 

That looks to be an old plug. They're usually a brighter red if new. Clean the seating area well before putting it in, and keep it clean. Lots of times road grime will build up under the lip of the seal, and stick to the oil residue.

Also, a tip from the Homer file: Don't smack the plug when putting a new one in. It's ridiculously easy to crack the window and create a much bigger leak. Ask me how I know... (D'OH!!).

 

HAHA thats funny. I ordered 2 new plugs to replace my existing ones. Hope they do the trick.

 

It could also be a cracked sight glass I've had that several times on older hubcaps it's only plastic it won't last forever but it's cheap and easy to change just wipe it off good and check for cracks around the edge it would also be good idea to make sure all bolts and screws are tight

 

I didnt think of that ill check those too.

 

I checked the bolts and they were a little loose so i tightened them back up and have new plugs on the way.