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Discussion Starter #1
Hi everybody. I have had an orange warning light come across the screen recently saying 'service all wheel drive system & service rear axle'. I reset the light and it goes away. It has reappeared off and on over the past week, but never more than once while I am driving the car nor does it come on every time I drive the car. Anybody ever get one of these warnings? Anybody ever have these items serviced? When I hook up my code reader (actron cp9575) it says there are no codes.....any guesses? Thanks!
 

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Hi everybody. I have had an orange warning light come across the screen recently saying 'service all wheel drive system & service rear axle'. I reset the light and it goes away. It has reappeared off and on over the past week, but never more than once while I am driving the car nor does it come on every time I drive the car. Anybody ever get one of these warnings? Anybody ever have these items serviced? When I hook up my code reader (actron cp9575) it says there are no codes.....any guesses? Thanks!
I bought my 9-5 Aero in Dec '10. In May '11, I started getting a "Service Suspension System" warning maybe twice a month. In Jun '11, I took it to a SAAB dealer, who traced the fault to the emergency brake needing calibrating. They did that, and it's been good ever since. Don't think there were any codes, per se, but do not know for sure. I do know they followed their fault flow for the indications I reported.

There was no noticeable change in how it drove when I got those errors, which I am sure is what you are experiencing ... no "feel" of a problem, just the error message once in a while.

So, while not your issue, just saying that the error message doesn't necessarily match up with what ails the car. Visit your official SAAB service center to have it checked.
 

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Search on the 9-3 thread on service XWD. The most likely issue is inadequate pump pressure. There are several causes.
GET IT LOOKED AT NOW. If it is just dirty or low fluid they may be able to save your diff by changing the fluid and filter. Otherwise the whole diff may start to fail.
 

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Discussion Starter #4
Thanks guys for the quick reply's. I spoke to my local Saab specialist in NJ and he told me to bring it by next week for him to hook it up and see what is going on. He hasn't had this come up with the new 9-5's yet so he is curious as well. I will let you know how I make out.
 

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So.....my rear axle hydraulic pump is bad. Going to set me back $900. My Saab 2 year power train warranty I got when I bought the car 4 months ago will not cover this part. If the rear axle broke it would fix it but not this part. Unreal!
 

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Well, consider yourself lucky because there's a guy on the 9-3SS forum with an XWD that needs the $1100 propeller shaft that goes between the transfer case and rear differential, and there are none available. So, his car is not drivable until he finds one... Ron
 

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sure it's driveable, Volvo owners have been doing this for years. XWD is not an enigma machine, its just simple Haldex
 

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So.....my rear axle hydraulic pump is bad. Going to set me back $900. My Saab 2 year power train warranty I got when I bought the car 4 months ago will not cover this part. If the rear axle broke it would fix it but not this part. Unreal!
I see this post is from last winter, so this info is likely not useful to you now... but in case anyone else looks at this post...

I spent WEEKS researching this issue. If your trouble code was C0407, it most likely meant that the fluid was low, which causes the pump to throw a code. GM found a lot of perfectly good pumps were being replaced (there's a post on saabworld.net that details the issue and procedures). Reasons for fluid being low include external or internal leaks, both of which can be solved by new seals and gaskets. The kit costs about $30 on ebay (be sure it comes with about 10 items total). Also, there is an updated filter that should be done at the same time (also about $30). The fluid is the most expensive at about $80/liter. Labor should be around 6-8 hours. For me, parts/labor/shipping cost about $800. A new pump alone goes for $1000+.
 

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Discussion Starter #9
Good info....my pump was definitely bad. Horrible high pitched whining was coming from it for awhile.....
 

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$4400 for a diff pump?!

I just left an authorized Saab repair center that quoted me $4400 to replace the rear diff pump. They told me the part alone was around $3000. Does anyone know where I can get a pump for less than this? Has anyone else had similar issue with the XWD systems?
 

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I just left an authorized Saab repair center that quoted me $4400 to replace the rear diff pump. They told me the part alone was around $3000. Does anyone know where I can get a pump for less than this? Has anyone else had similar issue with the XWD systems?
That's crazy. Did they tell you exactly what's wrong? There is a common issue that returns error codes C0403 or C0407, which point to the pump. Apparently, many GM mechanics were replacing perfectly good pumps when the actual issue was an internal or external fluid leak. These leaks caused low fluid levels, thus triggering the pump codes. All that needs to be done is a seal kit and a clutch piston. Those cost about $100 and the fluids will cost about $100. Check out this service bulletin for more info. Ask the mechanic to give you the DTC and the symptom code.
http://saabworld.net/f141/saab-9-4x-service-rear-message-displayed-dic-dtc-c0407-doc-id-2867044-a-27498/

I can't find the pump part number, but last time I checked (a few months back), pumps were about $1100, not $3000.

I had the full seal kit done, clutch piston, and filter kit. I did get one service light about 1000 miles after the kit was done, but since then, I've been good. That service might have been a fluke...
 

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Trouble code was C0407. They said they couldn't get just the pump so they have to replace the entire differential assembly. I don't buy it so I'm looking for options. I found a pump online for around $300 but not sure if it's the correct one. So maybe I add some oil and see what happens??
 

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Trouble code was C0407. They said they couldn't get just the pump so they have to replace the entire differential assembly. I don't buy it so I'm looking for options. I found a pump online for around $300 but not sure if it's the correct one. So maybe I add some oil and see what happens??
If there's no external leak, you can tell an internal leak this way... The differential will be overfill (there's a check plug with a square head). The clutch will be under full. There are a few places where it could be leaking internally. Hence doing a complete seal kit and eLSD piston. You must use the correct fluids. The differential fluid is about $20 and the clutch fluid is about $80 for a liter.

I've seen people pay $1000 for pumps. And $5000-7000 for complete systems. According to GM, it's rare that the pump will go. Even if the fluid is super low, the system should shut itself off to avoid damage to the pump and clutches.

Yea. I would try checking the fluids and making sure they're right. That might work for a short while. Overhauling my XWD cost about $250 (seal kit, piston, filter kit, fluids) in parts and $550 in labor.
 

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Discussion Starter #16
In my case I knew the pump was going. Every time I started the car up I would hear a high pitch whining sound for about 5-7 seconds. I will pull the invoice for the repair and post it for you to review. Give me a day to find it....
 

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Thanks guys. I have done a little more research and it seems logical that the issue is a leak or filter issue. I found this link that gave some valuable information. Looking for a good thread of how to change the diff and clutch fluid so if you know of one please let me know.

http://www.archivedsites.com/techlink/2010/10/all-wheel-drive-rear-differential-clutch.html
Here's the best writeup I was able to find for fluid/filter change. The 9-3 is essentially the same. By the way, there is a part update to the filter kit. The new part number is 20986573

www.saabcentral.com/forums/showthread.php?t=362785

If a fuild/filter change does no solve your problem, the best writeup for the seal kit and eLSD piston is here:

http://saabworld.net/f141/saab-9-4x-service-rear-message-displayed-dic-dtc-c0407-doc-id-2867044-a-27498/
 

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Discussion Starter #20
Good to hear you think you have figured it out. Here is a copy of my invoice for the pump along with the labor involved. You will probably have to enlarge it to view... invoice pic saab.jpg
 
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