2005 xc70 front rear bevel gear oil

mrscullini · Post by **mrscullini** » 08 Feb 2015, 06:41

thinking its time to change oil front and rear. volvo calls for their specific fluid front & rear. both meeting api gl-5 specification, front is 75-90, rear is 80. to me, this just looks like high quality gear oil. is there really harm in using a more common synthetic gear oil meeting the api gl-5 spec?

Post by **jimmy57** » 08 Feb 2015, 10:41

No problem using a quality synthetic gear oil in either the bevel gear or rear diff.
There is no known equivalent oil for the AOC (Haldex torque proportioning clutch unit) in front housing of rear diff. Volvo oil for that unit is priced liked all other OEM's using Haldex.

mrscullini · Post by **mrscullini** » 08 Feb 2015, 16:26

jimmy57 wrote:No problem using a quality synthetic gear oil in either the bevel gear or rear diff.
There is no known equivalent oil for the AOC (Haldex torque proportioning clutch unit) in front housing of rear diff. Volvo oil for that unit is priced liked all other OEM's using Haldex.

thanks. is there also a filter for the haldex unit?

bugeye · Post by **bugeye** » 09 Feb 2015, 17:48

The Haldex has a small filter, slightly larger than a shot glass. About $21 from the Volvo dealer. It comes with a new cover. Access is difficult, but not impossible.

mrscullini · Post by **mrscullini** » 10 Feb 2015, 06:49

thanks guys.

mrscullini · Post by **mrscullini** » 14 May 2015, 19:13

can also please get capacity on the bevel gear and rear diff?

Post by **vtl** » 14 May 2015, 22:37

1 liter/quart jug will be enough. Fill it until oil starts to drip, then suck about 100 ml out. 50 ml for Haldex.

Haldex is impossible to drain in any significant amount unless you take AOC pump out. If I remember correctly, I was able to refresh only 150 ml of oil or so working with Mityvac through filling hole. Also the pump has a mesh filter, it gets clogged too. If replaceable filter was dirty you probably need to clean the pump.

The pump died few weeks ago on the same year car, btw. A bit pricey, but not very difficult to replace. Even more easier on 4th gen Haldex, where pump is not covered by driveshaft's flange...

mrscullini · Post by **mrscullini** » 15 May 2015, 06:55

vtl wrote:1 liter/quart jug will be enough. Fill it until oil starts to drip, then suck about 100 ml out. 50 ml for Haldex.

Haldex is impossible to drain in any significant amount unless you take AOC pump out. If I remember correctly, I was able to refresh only 150 ml of oil or so working with Mityvac through filling hole. Also the pump has a mesh filter, it gets clogged too. If replaceable filter was dirty you probably need to clean the pump.

The pump died few weeks ago on the same year car, btw. A bit pricey, but not very difficult to replace. Even more easier on 4th gen Haldex, where pump is not covered by driveshaft's flange...

thanks. i had planned to use a mightyvac, figured that would be the only way. i am going to replace the filter on the haldex. is a code thrown in when the pump fails?

Post by **vtl** » 15 May 2015, 08:09

mrscullini wrote:is a code thrown in when the pump fails?

Yes, first I had DEM-0006 (pump failure) and then DEM-0007 (pressure sensor failure) shortly after. Replaced the pump, both errors went away. Still need to take old pump apart and see why it died.

mrscullini · Post by **mrscullini** » 15 May 2015, 17:13

vtl wrote:
mrscullini wrote:is a code thrown in when the pump fails?
Yes, first I had DEM-0006 (pump failure) and then DEM-0007 (pressure sensor failure) shortly after. Replaced the pump, both errors went away. Still need to take old pump apart and see why it died.

great, thanks. no codes as of now.

on another issue, can i use the same 75/90 in the rear diff? can't seem to find any straight wt 80.