Brought the front down a bit. Would have went lower, BUT I'm an idiot and went the wrong way the first time round and raised the car. Then, for some odd reason, the hex bolt that is supposed to lock the adjustable perch in place on the passenger side, decided it wanted to turn and turn and turn. I can't really move the perch, so I'm not too concerned, but irritated. And to top it all of, my left front inner CV boot is leaking (or so I think). I swear this is the same axle I just replaced last year. Pics of the leak at the end for confirmation that's what it is. Looks like CV grease and it's at the bottom of the axle.
But otherwise, pics. Lowered the car just shy of an inch. Will probably take it down a bit further to 23.5" GTF. I'm happy for now. The rear needs work - I'm swapping out to 6" Hyperco springs for more low.
That would be the front diff. The center is at the end of the trans and the rear is, well in the rear.
Since the axle side looks cleaner then the diff side I'd bet the diff seal is bad. Other wise wouldn't there be a leak from the boot to that area? And I think Audi may use a "life time" oil in that diff or it could share the same ATF fluid in the transmission, I am not sure. But judging by the darkness, the location, and the way it looks like it is leaking I'd say its the seal. Unless there is something I don't know about the way Audi seals that flange to the diff.
Now I haven't replaced one on the A4 but it will most likely entail removing the axle, removing that flange, and hopefully popping out the old seal and installing the new one.