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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > Audi SUVs (Q7 & Q5) and other V6 TDIs

Audi SUVs (Q7 & Q5) and other V6 TDIs Discussions area for Audi Q7 and Q5 TDI (2009+ in Canada & the US) as well as others with the V6 TDI such as the A6, A7 and A8 sedans.

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Old November 1st, 2019, 09:08   #1
av8r
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Default 2014 Q5 TDI Front and Rear Final Drive/Transfer Case

Fellow compression addicts,


Has anyone been able to dissect the Scheduled MX matrix for the scheduled frequency to replace the gear oil in the Front and Rear Final Drive and Transfer Case on their TDI?



Link to Audi MX schedule as of Apr 2018:


https://www.audiusa.com/content/dam/...RIL%202018.pdf


Seems like Audi could do a better job breaking that out in the matrix.



In my F350 dually I do it every 30K.
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Old November 8th, 2019, 04:48   #2
rt_hawk
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They probably consider it a lifetime fill like they consider the ATF in the Aisin 8 speed “lifetime” fluid. That’s why it states “check for leaks” for front and rear gearbox. Changed mine out at 46k in my q7. Probably will stick to 65k intervals going forward. My old 6.4 F250 I filled with liqui-moly in the front and rear and did my OCI’s @ 40k or so, but I towed extremely heavy with that truck, around 18-20k lbs with trailer brakes (farm plates).
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Old November 8th, 2019, 07:55   #3
Daemon64
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They do consider them lifetime like the tranny. I am getting the two diffs, transfer case, and tranny done on my q5 right now. It has 55k on it. It makes sense just to do them all at once. ZF recommends the tranny be done 60 - 90k.... on the lower end if the vehicle has towed.... mine has. I figure I'll just do them all at 55k intervals going forward. PIA... but cheap insurance....hahaha
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Old November 8th, 2019, 10:12   #4
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I wouldnít say itís a PIA, like 3 quarts total of 75w90 liquimoly GL5 plus the fancy 2 quarts VEEDUB transfer case magic oil... in the Q7, I think your transfer case gets a ZF fluid bath IFRC. I would say youíre definitely safe at those intervals, but when Iím in doubt, I gas-spec it out! (With a clean, uncontaminated sample that is) to see what kinda shiny metal parts are in that there dino fluid and how many Dino skeletons are left to provide a barrier, technically speaking that is...even if it keeps you from one early OC it pays for itself.
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Old November 9th, 2019, 06:09   #5
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Did anyone change fluid and filter on the ZF 8 SPEED - I'm try to find out how many litres of fluid needed for a fluid change?
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Old November 9th, 2019, 17:08   #6
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My aisin 8 speed took around 6.65 liters with a pan drop and filter replacement...I think the manual said 6.3 litres, I used Rowe ATF, plus 2/3rds of a OEM ATF bottle to get it to level at temp. But I got side tracked with my neighbor who came over for a "friendly chat" while I was extremely busy with my car on jack stands. Oh well...
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Last edited by rt_hawk; November 10th, 2019 at 06:42.
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Old November 11th, 2019, 06:59   #7
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Quote:
Originally Posted by Daemon64 View Post
They do consider them lifetime like the tranny. I am getting the two diffs, transfer case, and tranny done on my q5 right now. It has 55k on it. It makes sense just to do them all at once. ZF recommends the tranny be done 60 - 90k.... on the lower end if the vehicle has towed.... mine has. I figure I'll just do them all at 55k intervals going forward. PIA... but cheap insurance....hahaha
Daemon64, Did you get the work done?
For the Q5 transfer case is a litre enough fluid for drain and fill ?
Is a litre for each differential enough fluid for a drain and fill?
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Old November 11th, 2019, 09:18   #8
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A1,

I am having my mechanic do the work.( I live in an apartment at the moment, and don't have a good space / setup to do this kinda work right now ) But I believe it was only 1 bottle for transfer case, and 1 for each diff. Then a ton for the tranny itself. But one of them uses a special fluid that the other two don't and its' EXPENSIVE per bottle like $90... I wish I could provide more insight but I don't know much about this one... my gig is brakes, suspension components, and such. They are finishing it up today. They were doing all my 034 motorsports parts first and doing the tranny stuff last.
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Old November 11th, 2019, 15:14   #9
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Thanks Daemon
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