I thought I would just chip in.
I talked to redline, bugged them greatly about the Haldex compatibility in my XC-90. I drained out the excessively worn haldex fluid that was probably 150,000km old based on the receipts for the last Volvo service receipts. The fuel filter was also 15 years old and poured out black scum... Amazed it actually ran.
I drained it by the pump, cleaned the pump head and screens, changed the filter, ran it for 500km. Pulled the pump and filter again, new filter new fluid.
Put about 10,000km on the Redline MT-LV in the Haldex and it was glorious compared to the very shredded fluid that was in it. In Canada, the OEM fluid is viciously expensive. Also apparently Haldex/VW have changed the stock fluid recently-ish. The older spec fluid is a Group III it seems, the latest one from what I can gather is a Group IV/V mix, or maybe that's just an excuse to boost the price.
As for the rear of the Haldex and my angle gear, I used Amsoil 75w90. This time, I'm going with Motul Gear 300 75w90 in my V8 XC-90. I can't easily get Amsoil locally, as the local distributor shut their doors.