Rear diff vibes and leak, need help diagnosing?

[Chadman]

I started getting rear vibes about 2000 miles after installing OME 880,906 suspension on my 2002. The vibes come in around 60-65 mph. I inspected and found the rear diff is leaking but I'm not sure where from. There is a an oil spot to the right of the pumpkin on the passenger side. doesn't seem to be coming from and cracks or crevices. Kinda weird. pics attached. :shrug:

 

[brian2sun]

The vibes you are feeling may be just because the coils are stiffer than stock. Did you get it aligned after you installed the lift? Your axle housing looks like it's leaking/seeping because it's rusted out a little too much.

 

[pinchshopper]

I don't know about the vibration, but from the pictures, it looks like the oil residue is from a leak up front that just landed on the differential.

 

[brian2sun]

I don't know about the vibration, but from the pictures, it looks like the oil residue is from a leak up front that just landed on the differential.

The front of the axle/3rd member is almost totally dry. That's the backside with all the oil on it.