Rear End Leak, not mine, the trucks

[dboyw]

Since the weather turned cold, I have rear diff fluid on the driveway. It looks as if it is from the vent pipe. It did it a little last year, nothing over the summer, and now it is back worse.

Any ideas?

I am running Amsoil Severe Gear 75W-140 with a Mag-Hytec cover.

I have not been able to really check the diff yet due to temps feeling like -15 with the wind, but will as soon as I can.

Thanks

 

[Zookie400]

the only time i have seen fluid coming out of the breather on a diff housing is:
-overfilled
-overheating (wasted differential)
-wrong breather installed (no baffle....im not sure as this applies to light duty trucks, but more class 8 stuff)