Update; I checked my rear pumpkin.. it was low on rear end oil. I put more in. It seems it has a slow leak from the last 3 years or so.
Nothing wet on pavement. Some black oil seems to be seeping from the top of the rear end.. and leaking down across the face of the rear end. But its not wet, just blacker than It should be.
Going up a grade/ hill going about 45-50 mph. If I let off the gas and then step on it again, I get this fump from the rear of the car. I can replicate it by doing the same thing again.
Doing some searching for parts without actually getting under the car and inspecting, I don't have a lift and I didn't want to tear into the exhaust shield etc. before getting an idea from you guys.
I don't relish putting my car on 4 jack stands and lying on my back to inspect the U-Joints. I'm not a mechanic, but I can do the work if I need to. I just hate the not knowing what I'm looking for.
I haven't looked into the rear shocks or mounts yet, as it seems drive line related.
I went looking for some parts, Specifically the U joints and a center bearing. These are not easy to find via online parts stores. Rock auto is out of U joints, but I think I found some replacements on Ebay.
The thing I thought I might need to look at is the center support bearing. I cant find this anywhere. I haven't gone to Subaru as I was hoping to find it at a lower cost. But I cant even find a part number for it.
1996 Legacy wagon, 2.2 EAT