Originally Posted by ehsnils
Center diff is in the gearbox. But all services are recorded in the book so unless there was a failed service that shouldn't have been a problem.
And I know of two more cases - one on the forum (http://legacygt.com/forums/showthread.php?t=118933
) and another at the shop where I did bring the car for investigation of the noise.
But I did resolve the problem by getting a new car instead.
I thought it was the rear diff.
The center diff is actually behind the gear box. Mine went, and was replaced on warranty about 1 year ago.