06 xc90 v8 awd kicks in after front wheels spin ~20mph

geck0 · Jan 5th, 2015, 08:07

As the title says I took it in for anti skid service required dash info light when i bought this truck. They got the light to turn off with a software update but after a wet day the rear wheels still only kick in after the front have spun to about 20 mph then BAM the rear kick in violently. Ive searched and have little definitive success. The dealer tried to sell me new rear wheel bearings as he said the abs signal is lost....arent they seperate? and the bearings were replaced before i bought the car making me think this has already been recomended and didnt fix the issue. I need to get the 4wd working before it snows. Sorry for spelling issues my fingers are too big for this damn phone..thanks in advance for any help

bugeye · Jan 6th, 2015, 18:49

How many miles? Any service history for the Haldex system? Are there any Volvo fault codes from the Haldex? Has the fluid and filter in the Haldex been changed?

geck0 · Jan 7th, 2015, 05:33

06 82k miles standards services. Both rear wheel bearing assemblies replaced before me, besides that I do not know any of the answers

bugeye · Jan 8th, 2015, 13:37

A Volvo dealer can check for error/failure codes which point to the possible issues to be corrected. I changed the fluid and filter in our '04 XC70 at about 99000 miles and it was black. Drove for 1000 miles and changed fluid again. The Haldex pump may not be generating the required pressure, or the pressure sensor may be failing, or something else. Checking for codes is the place to start.

geck0 · Jan 8th, 2015, 21:45

The dealer was little help they pointed to the rear bearings and otherwise saidcthey had no idea. My local indy is interested in looking at it but says iys a new one to him. I will check the fluid any write ups on diy for that?

bugeye · Jan 9th, 2015, 15:42

Volvo dealer computer system will check for codes if any related to Haldex. A generic code reader will not see these Volvo specific codes. If you went to a Volvo dealer, ask for the codes and post. Replacing the Haldex is expensive and may not be the source of no AWD. May be as simple as a pressure sensor or control board within the Haldex. Suggest finding a local independent Volvo garage.

Simon Jones · Jan 13th, 2015, 22:43

There is a company in the UK that specialise in servicing Haldex systems, but interestingly, I couldn't see any reference to Volvo on their website: http://sjbautotech.co.uk/hampshirehaldexservicing.html

Jan 5th, 2015, 08:07	#1
geck0 New Member Last Online: Jan 14th, 2015 07:13 Join Date: Jan 2015 Location: cincinnati	06 xc90 v8 awd kicks in after front wheels spin ~20mph As the title says I took it in for anti skid service required dash info light when i bought this truck. They got the light to turn off with a software update but after a wet day the rear wheels still only kick in after the front have spun to about 20 mph then BAM the rear kick in violently. Ive searched and have little definitive success. The dealer tried to sell me new rear wheel bearings as he said the abs signal is lost....arent they seperate? and the bearings were replaced before i bought the car making me think this has already been recomended and didnt fix the issue. I need to get the 4wd working before it snows. Sorry for spelling issues my fingers are too big for this damn phone..thanks in advance for any help

Jan 7th, 2015, 05:33	#3
geck0 New Member Last Online: Jan 14th, 2015 07:13 Join Date: Jan 2015 Location: cincinnati	06 82k miles standards services. Both rear wheel bearing assemblies replaced before me, besides that I do not know any of the answers Last edited by geck0; Jan 7th, 2015 at 05:35.

Jan 6th, 2015, 18:49	#2
bugeye Junior Member Last Online: Nov 24th, 2019 20:14 Join Date: Jan 2014 Location: Reading, Pa, USA	How many miles? Any service history for the Haldex system? Are there any Volvo fault codes from the Haldex? Has the fluid and filter in the Haldex been changed?

Jan 8th, 2015, 13:37	#4
bugeye Junior Member Last Online: Nov 24th, 2019 20:14 Join Date: Jan 2014 Location: Reading, Pa, USA	A Volvo dealer can check for error/failure codes which point to the possible issues to be corrected. I changed the fluid and filter in our '04 XC70 at about 99000 miles and it was black. Drove for 1000 miles and changed fluid again. The Haldex pump may not be generating the required pressure, or the pressure sensor may be failing, or something else. Checking for codes is the place to start.

Jan 8th, 2015, 21:45	#5
geck0 New Member Last Online: Jan 14th, 2015 07:13 Join Date: Jan 2015 Location: cincinnati	The dealer was little help they pointed to the rear bearings and otherwise saidcthey had no idea. My local indy is interested in looking at it but says iys a new one to him. I will check the fluid any write ups on diy for that?

Jan 9th, 2015, 15:42	#6
bugeye Junior Member Last Online: Nov 24th, 2019 20:14 Join Date: Jan 2014 Location: Reading, Pa, USA	Volvo dealer computer system will check for codes if any related to Haldex. A generic code reader will not see these Volvo specific codes. If you went to a Volvo dealer, ask for the codes and post. Replacing the Haldex is expensive and may not be the source of no AWD. May be as simple as a pressure sensor or control board within the Haldex. Suggest finding a local independent Volvo garage.

Jan 13th, 2015, 22:43	#7
Simon Jones Premier Member Last Online: Jan 15th, 2022 11:23 Join Date: Feb 2009 Location: Salisbury (ish)	There is a company in the UK that specialise in servicing Haldex systems, but interestingly, I couldn't see any reference to Volvo on their website: http://sjbautotech.co.uk/hampshirehaldexservicing.html

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