I had the gearbox and rear diff fluid changed to BP 75w90 (synthetic). about 1.3 liter went into the rear diff and 2.7 was left for the manual gearbox.
It feels not the same now. The slickness of shifts seems to be out and the rubbery feel of a subaru manual gearbox is in.
It's also seems more difficult to get A4 into the second gear.
I'm hallucinating or what? OEM VW transaxle oil is about $45 a quart (liter actually) around here and I'd rather not spend those $135 plus labor to get the shifting slick and seamless again.