[s-cars] This car doesn't like me..

[Ivan Demkovitch]

List,

In October 2005 (15k miles ago) I replaced differential seals.

I did a lot of work targeted on eliminating any leaks which I had plenty..

Now I thought somebody parked on my driveway because I found few oil drops. Nope.. Wrong. After parking in garage I found nasty GL5 drops on my nice epoxy floor.
I was pretty sure it's driveshaft seal on differential (the one I did not replace). But it's indeed LEFT seal.

So, 15k miles later it needs to be replaced again. What was it? I'm thinking combination of not exact depth and not precisely flat installation.

If I polish flange AND make special tool to install seal perfectly square, should it fix it? Or new flange is the only way to deal with situation? I recall that groove on a flange from original seal was pretty deep.

Thanks,
Ivan

93 S4 (with no leaks until now)