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Discussion Starter · #1 ·
Hi there,<p>I would like to begin my story by explaining how I am in my current predicament.<p>I have a 04 XC90 T5 and bought it used last year. I was informed that the transmission for that car was changed, but no reason was given. The cost for the replacement was taken care of by Volvo.<p>At the beginning of this year, after a 1000 miles journey, I noticed the gear changes from 4th to 5th weren't smooth and also, from P to R and R to D, there was a slight jerk.<p>So, naturally I went back to Volvo to tell them this issue, and took down my report and suggested I changed the transmission oil. <p>Also, I realized I didn't have AWD working properly, so upon checking, I found that the hydraulic oil at the rear axle of the Haldex was leaking out. I had it topped and it soon leaked out again within a few days of driving. I had planned on getting it replaced, as long as the Dealer could confirm exactly which parts I needed to change. <p>I did that at the Dealers and after a month, one day 2 weeks ago, my transmission completely failed on me.<p>I had no drive at all in any gears and I had to have it towed to the Dealer. After more than a week of investigation and my many numerous complaints even up to Sweden, did I know the full story.<p>It appears that the previous owner, was told by Volvo Cars that the transmission had failed because there was a problem with the AOC (the AWD system) which had run dry due to an oil leak at the rear axle. That caused the transmission to fail. Volvo offered to replace that part on a sharing cost basis, whilst the transmission was replaced FOC. <p>The owner, being a tightwad, didn't bother to replace the AOC and just told Volvo to proceed with the Free transmission change and that he would sell his car after that.<p>I became the victim of this action. Now Volvo is saying that my transmission died because of the AOC and there would be no replacement for this. They could work out a cost sharing thing with me, but I refused.<p>I claimed, that if Volvo knew the history of my car, they should have taken every liberty to warn me as the new owner of this vehicle, about the possible problems I will face if I had not checked on the AOC. They never bothered to inform me even after I made reports to my dealer who in turn made reports to Volvo Cars with my VIN number, and explaining about my multiple problems. <p>Red flags should have been raised after they would have realized this car's previous problems and they should have made me aware of this, instead of leaving me in the predicament. <p>I really need some advice here. Can this AOC really cause my transmission to fail, or are they just making up some story for me? <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <p>Please help
 

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Well, unfortunately, I don't see good news available. Thing is, "Volvo" had nothing to do with your problem. It was the dealer who sold it to you. They are not volvo, they are an independent business. <p>You also have to take some responsibility here, though. When we bought our used XC90, I asked the service center to print up a complete history, which they happily did and gave to me. I know all complaints made about the vehicle and the actions that were taken to correct.<p>Anyway, you might have a leg to stand on against the selling dealer, and even that is very shaky ground, but you have nothing against Volvo.
 

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Re: (crash)

<p>If the AOC is plugged or has debris that is in it that gets back into the trans you can have<br>problems.. AOC should always be changed if there are trans issues as there is no good way to make<br>sure it is debris free.<p>This is a dealer issue, not a Volvo issue.
 

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Discussion Starter · #5 ·
Re: (dmd)

Thanks for all the comments.<p>But may I ask, why does the AOC fault cause the Transmission to fail? How is it connected? Sorry for the noob question, as this is my first AWD vehicle and I am trying to find a connection.<p>So, can I confirm, is the transmission really dead or will the fix of the AOC makes things better?
 

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AFAIK the AOC is the Active On-demand Coupling...aka. the Haldex unit that's mounted at the other end of the car at the rear axle.<p>There's a long propeller shaft between said AOC and the transaxle which ensures that cross-contamination fluid-wise of either is physically impossible.<br>
 

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I'm not intimately familiar with it, but my guess is that the extra "drag" of the problematic AOC is what caused the tranny failure.
 

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Re: (Dextrobrick)

<p>Agghh... Thought it was the "Air-to-Oil-Cooler" LOL....
 

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Discussion Starter · #9 ·
Re: (Qbrozen)

There is a Hydraulic clutch which only received 5% of total power produced, unless there is a wheel slip at the front, only than will the Haldex engage the clutch.<p>So, unless I was driving on very slippery conditions all the time, I am surprised about the additional load put on the transmission to fail in less than 1 year. <p>I like your suggestion, it could be the problem.<p>As for cross contamination, I would agree, there is no possible way.
 

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Discussion Starter · #10 ·
Re: Strange Transmission Problem (xceeninety)

Problem solved. Changed the offending parts and got my car back last week.
 
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