Is wet spot on axle housing near the differential a cause for concern?

[mobilnissan1991]

I changed the oil in the rear end of my F150 at 203k with Amsoil 75W140, it now has 228k and while underneath the other day I noticed this spot on the axle, it isnt wet. Is this a sign of a leaking seal?

 

[Chris142]

Normal. It's where the axle is pressed into the housing.

 

[NiwradND]

pretty normal for Ford with 200k miles, watch the rearend levels, probably will not get any worse than what it is.

 

[oldhp]

That's probably 1/8 of one small drop of gear oil. It's keeping that part from rusting. Good to go!!!

 

[Ursatdx]

Be sure to check specs when filling.
Older Fords would spec 3/8" below the lowest part of the fill hole.

 

[labfan]

It is but it's fine to be honest. That looks like a few drops worth and it isn't something that's going to get a lot worse suddenly. I'd just top it off and watch it.

 

[Inspecktor]

Looks to be pretty dry, so I would not worry. Check level periodically.

 

[spasm3]

Looks ok, i'd blow through the vent hose just to make sure its venting properly. Make sure what you see is not a drip onto the housing from the vent.

 

[Lubener]

Nothing to be concerned over.

 

[Lubener]

Looks ok, i'd blow through the vent hose just to make sure its venting properly. Make sure what you see is not a drip onto the housing from the vent.

Doubtful that the vent is restricted. The oil would escape out the least resistance opening and come out the seals or gasket first

 

[Quantico]

No big deal. My ford looks the same.

 

[D60]

Very normal. Virtually zero you can do about it. You'd have to replace the entire rear which would be foolish. Don't try running a full weld unless you know what you're doing -- warping the entire housing is the more likely result