sports differential fault

[Joe2.0E]

When you eventually get to drain the old fluid, you might let us know what condition it was in ? Mine has never been changed and my old D3 had it changed once at about 200K miles. This was only done as a leaking output shaft seal was being replaced. It might be prudent to have it changed at a sensible interval rather than the "sealed for Life" response that most main dealers use.