Definitely on my short to-do list - because common sense tells you that oil breaks down over time in high heat situations (period). Volvo must be taking crazy pills. I'm going to drain and fill every drivetrain fluid I can and I recommend everyone does the same, especially in their awd system. Oh, if you do have AWD, make sure to get a new filter.Just had my fluids changed yesterday. Manual says fluids are forever, I had a local Volvo mech tell me he had never changed the fluids and did NOT have the tools to do so. 2007 V50 AWD 6spd with 145000 miles. Anyway, my reg. mech said the old rear diff fluid had the consistency of tooth paste. I urge anyone with AWD to have the fluid changed.
I think it depends on how the vehicle is driven. I replaced my fluids at 160k, and despite the horror stories on the stickied threads about the "swamp piss" smell of the AOC Haldex fluid, mine was not even dark. I replaced the Haldex filter as well and again, did not see the junk plastered to it that others have noted. The only fluid that i was concerned about was the bevel gear (the front transfer case). It was quite low, and after about a 70 mile drive to warm up the oil prior to changing the unit was about as hot as the exhaust. I should probably see if the same temps are there now with the fresh fluid.
Now, i must caveat that i bought this at 110k, and i do not know what the previous owner did as far as maintenance. I will say that he had replaced the battery with a volvo unit, so my guess is he did everything at the dealer and therefore lifetime lube was probably never touched. The AOC filter cap was also the old style steel (mine is a 2005) vs. the never heat sink aluminum, so another mark for nearly 10 yr old fluid.
here are the PNs
Bevel Gear 31259380 - 1qt
AOC 31325136 - 1qt
AOC filter 30681138
Rear Diff - 1161620 - 1qt
I used amsoil Manual Tranny for my M66 - I bought 3 qt, but as others have said only 2 qt is really needed. Same thing on the above, i have a little left over in each bottle. I also used a syringe rather than a pump / extractor. Worked pretty well, just need a piece of about 8" hose on the end to reach the furthest places. It is a bit of a pain in the arse - especially getting to the AOC fluid fill port, but once you know how to contort your hands to get into it no problems.
No Idea about V70R, but on V50 there is separate oil listed for rear diff and separate for angle gear. How those differ, cannot tell you, I just got both from Volvo and didnt worry about spec.hi all
can anyone tell me if the oil in the diff is the same as in the front transfer box--may sound a silly q but have had a few sites selling oil as diff / transfer box oil.--any help would be good--thx
i have a 2000 mk1 v70r awd [ phase 3 ]