Just got the car back from having the rear seal on the center diff replaced. I went from having a dry garage floor to having a significant pool of fluid in about 3 days. This was different from the usual leaks I have experienced in many cars over the years, where a small leak worsens over a period of months and reaches a point where it can't be tolerated.
Good news is that the dealer had the seal in stock--I guess it must be the same for many other Audis.
Question is whether the harder mounts I had installed a few years ago might have played any role here. Any thoughts? Just never had a drivetrain leak like this before.