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Issues with freshly purchased q7

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Issues with freshly purchased q7

 
Old 04-04-2019, 09:58 PM
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Default Issues with freshly purchased q7

Last month I bought a used q7, and took it to the dealer, and it passed all of their safety inspections here in Japan.

I noticed 2 strange things after swapping in new oils/brakes/coolant/ PS fluid....

1. I still get a gear whirring noise that I didnt have on my old A6. I am thinking differential or transmission... should I change the fluids for these? Could it be something else? Am I worried over nothing?
2. My driver's side rear suspension leaks out overnight sometimes. Some days I can go to work and its still just as high, and sometimes It looks like the lowered for loading level. This has never noticeable during a workday (7hrs). I think it has something to do with our really cold nights (15C different between night and day here).

Regards,
A new q7 owner
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Old 04-05-2019, 05:39 AM
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I would check/ change fluids in both differentials and the transfer case as these are easy, then the transmission too.
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Old 04-05-2019, 06:33 AM
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Could have a stuck check valve on Air bags, they get particularly sticky when its cold.. moisture from the air can cause em to freeze and get stuck.
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Old 04-07-2019, 11:20 PM
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I didnt even think of the transfer case.
Any idea on which oils I should use for the diff and transfer case.
My plan was to use a 75w90 for both differentials...


I dont think anything is frozen. Its pretty warm here.. about 25C(80F).
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Old 04-08-2019, 07:11 AM
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Originally Posted by the1weezle View Post
I didnt even think of the transfer case.
Any idea on which oils I should use for the diff and transfer case.
My plan was to use a 75w90 for both differentials...


I dont think anything is frozen. Its pretty warm here.. about 25C(80F).
https://www.audiworld.com/forums/q7-...hange-2969607/
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Old 04-08-2019, 04:35 PM
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How can I find the part number for my vehicle (4.2) because that guy posted for a Diesel. I am pretty sure that the transmissions for our two cars are different, which might affect the transfer case, but I want to be sure.
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Old 04-08-2019, 04:41 PM
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its the same oil regardless, if you dont believe us walk up to your dealer service dept and order it from them w/your VIN.. FYI Transmissions are same manufacturer, just different gearing.. and this is diff/transfer oil, not transmission fluid
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Old 04-08-2019, 11:09 PM
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Oh sorry I thought transfer cases usually match transmission fluid.

I knew the diff oil is closer to MT fluid than atf.

I tried to find the parts... but my local amazon doesnt sell it.. nor does my dealer, who I just called.
It will cost me about $100 per bottle for the audi genuine stuff. What are some good alternatives?
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Old 04-09-2019, 08:38 AM
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The Audi fluid is around $26 a bottle. If you buy it online ECS is a good choice, but the dealer should be around the same price.
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Old 04-09-2019, 06:32 PM
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Dealer doesn't sell it (same reason that I cant get it repaired there) and ECS is charging me $50 shipping to my country. Guess I am buying everything from them to make it worth while... Thanks for the tips.
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