Rear Diff change (4 wheel drive service required)

scooby5141 · Feb 5th, 2024, 21:13

2010 Volvo XC70 D5 Manual. Bought this car with really loud rear differential whine. I bought a 2nd hand diff with the same part number and got my local garage to change it for me. New diff is quiet but is throwing up a 4 wheel drive not functioning service required code. Do I need to do some sort of reset through Vida or is the Haldex pump on this diff knackered. Before the garage changed them over I did a service on the Haldex (new filter & oil) which went smoothly.

GrahamBrown1 · Feb 5th, 2024, 21:59

When you had the diff swapped did this include the DEM. If so be worth putting your original one back on but ideally Vida would show you where the fault lies. I’m just thinking the car may not recognise the new diffs DEM if it was fitted as an entire unit.

scooby5141 · Feb 6th, 2024, 12:07

Just read up on the DEM, didn’t know about this little box of electronics & changing it with the original makes perfect sense. Luckily I kept the original Diff for when this 2nd hand one gets noisy to have it reconditioned so I’ll swap it over. Looks straightforward enough. Thanks 🙏

Feb 5th, 2024, 21:13	#1
scooby5141 Junior Member Last Online: Feb 6th, 2024 13:06 Join Date: Mar 2012 Location: Dover	Rear Diff change (4 wheel drive service required) 2010 Volvo XC70 D5 Manual. Bought this car with really loud rear differential whine. I bought a 2nd hand diff with the same part number and got my local garage to change it for me. New diff is quiet but is throwing up a 4 wheel drive not functioning service required code. Do I need to do some sort of reset through Vida or is the Haldex pump on this diff knackered. Before the garage changed them over I did a service on the Haldex (new filter & oil) which went smoothly.

Feb 5th, 2024, 21:59	#2
GrahamBrown1 VOC Member Last Online: Yesterday 18:57 Join Date: Feb 2013 Location: North Yorkshire	When you had the diff swapped did this include the DEM. If so be worth putting your original one back on but ideally Vida would show you where the fault lies. I’m just thinking the car may not recognise the new diffs DEM if it was fitted as an entire unit. __________________ Previous -03 S40, 04 V70 D5 SE, 04 V70 D5 Sport, 05 V50, 07 S60 D5, 09 V70 D5 R design, 12 XC60 DrivE, 15 V60 VEA Oil Burner Current- 05 XC90 D5 Executive, 12 XC70 D4 AWD Se Lux, 14 S80 D3 Se Lux Last edited by GrahamBrown1; Feb 5th, 2024 at 22:08.

Feb 6th, 2024, 12:07	#3
scooby5141 Junior Member Last Online: Feb 6th, 2024 13:06 Join Date: Mar 2012 Location: Dover	Didn’t think of that Just read up on the DEM, didn’t know about this little box of electronics & changing it with the original makes perfect sense. Luckily I kept the original Diff for when this 2nd hand one gets noisy to have it reconditioned so I’ll swap it over. Looks straightforward enough. Thanks 🙏

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