Audi S4 Sport Differential Oil Change DIY (2009-2016 B8 & B8.5 Audi S4, S5, RS4, & RS5)

[@jonathangipaya]

Love the B8/B8.5 content! If you ever get around to doing a valve cover gasket video for the 3.0T, that would be amazing

[@fcpeuro]

Great suggestion!

[@iandartez]

I've watched tons of videos, DYI, how-to, etc. This was by far one of the best. Spoke clearly and not too technical, clear footage, good lighting. Gained a new follower and like, my friend !

[@tichen1716]

Great video. If will be super if you can make a video about front differential and the transfer case oil change.

[@fcpeuro]

Great suggestion!

[@robertwinston2496]

Great content as always. What I find so funny is how many shops charge 4-5x the cost of an oil change to do service the diffs when it's really the same procedure. Drain, fill, drive.

[@fcpeuro]

Thank you Robert, spot on!

[@chrisl746]

tools costs tho😅

[@evannygard]

Videos are always excellent, thanks guys!!

[@fcpeuro]

Thanks for watching!

[@rizrz34]

It should be noted that there is a fill procedure for the ATF portion of the diff. In VCDS you can fill the lines, bleed them etc. If you don't follow this procedure, you risk underfilling the diff and then getting sport diff faults.

[@fcpeuro]

Thank you for the note!

[@juanriat4056]

Can you add more details on what needs to be done? I have VCDS and doing this on this coming weekend so want to make sure I do this right. Thank you

[@mhamrin5906]

​@@juanriat4056hello, did you ever find the procedure? I'm bout to do it... my diff is starting to hum.

[@juanriat4056]

​@mhamrin5906 hmm I did mine but don't remember doing anything so I might have found out mine didn't need it

[@mhamrin5906]

​@@juanriat4056thank you

[@Pr1ncealmighty]

Considering the 2014 Audi a4 6 speed manual. Such a nice car and nice pricing on the market right now

[@fcpeuro]

Great daily!

[@nkawtg4]

Great video. I have a B8.5 S5 with 6MT. Isn't there a front diff and center diff as well? I have looked on FCP main site and am confused. I want a kit to replace ALL the diffs and trans fluids... I'm thinking rear diff / rear sport diff (kit for that exists, thanks) / center diff / manual trans / front diff. Am I overthinking again? I drive hard every day at high boost with 90k.... I'm sure it's overdue.

[@Kfz.9]

Schöne Grüße aus Deutschland super Arbeit weiter so Seher hilfreich

[@jordanb7485]

Ive read on some forums that the atf side is supposed to be "bled" by either vcds or by going out and driving to activate the diff then top off the fluid again. Do you guys just recommend one fill up and done?

[@fcpeuro]

Hi Jordan, a drain and fill is sufficient for this.

[@laurawilliams9338]

Like the oil drain plug, are the differential drain plugs a one-time use?

[@Andy351c]

Thanks for the video. This is on my to-do list

[@fcpeuro]

Thanks, Andres happy to be of some help!

[@mhamrin5906]

Nice. Very helpful! Why would it be not a good thing to overfill it a bit? I saw one guy on YT try to overfill it on purpose.

[@Hopelessthugg]

How on earth did you not edit thus video to tell people they must bleed the sport diff? Driver side. Fill it up. Go do hard circles left and right in dynamic mode. Then refill. It'll take more. If you have vcds u can use that to prime it.

[@LAW-Automotive]

Great video, thank you. I've got red fluid leaking out of the atf side of mine, it look like the shaft flange seal is leaking. I also have a diff control module fault so my plan is to unplug the module and recode the car to not have a sports diff just so it runs as a normal diff. So my question is do you think having low atf fluid inside the diff and having normal level gear oil on the other side will cause me any issues? Im thinking it won't as the atf doesn't provide lubrication as such, it's just to engage the clutches either side and provide extra torque to one side or the other as demanded in extreme driving. Would love to know ymif you agree with this?

[@icemanmb]

Don't forget to use VCDS or a good diag to fill, bleed and pressure test the lines for the rear diff and also reset the oil aging values too.

[@Therettes098]

Why is this necessary? I haven’t found anything on this and he doesn’t even mention it?????

[@icemanmb]

@matthewlocascio3343 because you need to refill the pressure pipes and bleed any air out of the pumps and lines, also it uses oil aging to calculate the clutch pack efficiency for each side. Most people treat it like a normal drain and refill because they've not read the Audi repair methods.

[@gmr19]

Could one simply follow the video tutorial here, drive the car a few miles and recheck the fill to see if the diff will take a little more oil?

[@ashanisibble8595]

Will this work for a 2010 S5 manual transmission with sport differential ?

[@rllyhavenoclue]

It’s not clear which oil goes on which side ?

[@rllyhavenoclue]

Answered my own question. I got my fluids from the dealer and they had stickers on them saying “gear oil” that made things even more confusing. So- the transfer fluid goes on the driver side. And the axle oil goes on the passenger side.

[@KenKwan69]

@@rllyhavenoclue Thank you! Came here looking for the same thing. Cheers!🍹

[@dylandalka8700]

There’s 2 different oils. Which one goes to which side

[@ZemzyOseris]

Gear Oil (1L bottle) is the first section of the video, Transfer Case Fluid (850ML bottle) is the second section of the tutorial.

[@gagev74]

For anyone watching this vid in the future, the driver side (stamped ATF on the case) takes the transfer case fluid [#G055515A2] and the passenger side takes the gear oil [#G052145S2].

[@EJR20]

I’d like to preface this with I’m referring to a 2009 A4 Quattro & I have new motor mounts & trans mount but I still have drivetrain vibrations coming into the cabin. Car’s at 170,000mi got it at 150,000mi not sure if they ever changed transmission fluid or filter, or any of the diffs oil, I’ll have the mech see if they can tell. Now with the diff, would bad a lower differential bushing and rear carrier bushings cause vibrations to the cabin? Especially when I throw it in gear, reverse is even worse. And does the front differential and center differential transfer case have mounts or bushings?

[@Rspusher]

Not bleeding the air on a £6k+ sports diff? Madness my man! Absolute madness 😂😂

[@ArianaGandhi1]

Is this the same process as a 14 S6?

[@ericgardner7674]

Do you have a DIY Video on draining/filling the MTF side of the DL501 transmission?

[@fcpeuro]

Hi Eric, not something we currently have, but we will add it to our queue!

[@Alonso_99]

You got the link for the fluid pump?

[@Kiss__Kiss]

Let me guess, it's Mike Hidalgo here with another FCP Euro DIY!!! lol Let's get to it..

[@fcpeuro]

You already know it!!

[@jonathangipaya]

Mike Hidalgo is good people ❤️❤️

[@Kiss__Kiss]

@@jonathangipaya He does seem like a chill dude, indeed.

[@Zolika4]

Is the amount of fluids (both types) included in this kit sufficient, or should I buy additional bottles? Thank you.

[@winfle]

I think, its 1l each

[@fcpeuro]

There is more than enough fluid for both sides!

[@theecuconnection]

To keep the plugs from getting stuck and fighting with it afterwards, just rock the ratchet end towards and away from the diff a few times. If that doesn’t work you can always tighten it a little and loosen it again. That helps save a ton of frustration. If it was a high torqued bolt when you tighten it again, you can sometimes hear the socket break free with a quiet “click”. Also, DO NOT do this if the plug isn’t almost all the way in. If you do this with only a couple threads hanging on(almost completely removed), you can pull or damage the threads and cause a bigger headache. Also, don’t be a HeeMan. 5-10ft lbs for those of you with a bionically calibrated built-in torque wrenches.😂

[@ericgardner7674]

Are the sport differentials the same in a Audi C7S6 and would the same draining/filling procedure be used?

[@ArianaGandhi1]

Did you figure it out? Looking to do the same on my C7 S6

[@namelast4606]

What about the front differential?

[@ArtemLokhovitskiy]

Integrated into transmission casing and it shares the same oil as transmission gears.

[@bensontemu9356]

How Much Liters Users

[@audis5512]

Do the manual transmissions in the b8.5’s have a centre differential fluid fill and drain plug? Or is it integrated into the transmission ? Wondering how I would service my centre differential in my 2013 S5 6MT with sport differential…….would a simple transmission fluid change service both centre diff and trans on the 6MT’s?

[@mhamrin5906]

I have the same year s5 6MT. Did you ever get an answer? Thx!

[@audis5512]

@@mhamrin5906 it’s all in the same casing, so drain into a clean container and refill the same amount or until fluid dribbles out the fill hole for the transmission. Redline MT90 manual transmission fluid was what I used

[@Ulubey95]

Hi bro what problem c102af0 .?

[@rjc89sir]

So the atf side is only for sport diff models?

[@fcpeuro]

That is correct, Ryan!

[@z32twinturbo13]

How do I know if mine has the sport diff. Mine is a S5 B8.5 It has all the gadgets. Lane change assist, back up camera. Come on 19’s from factory

[@fcpeuro]

The best bet is to simply look under and visually inspect the differential. You can also use a VIN decoder to see if the vehicle is equipped with it.

[@z32twinturbo13]

@@fcpeuro holly is you replied back. Thank you for that information! Seriously thank you

[@martinevans6289]

I’m guessing that the ‘passenger side’ comments are not relevant for us here in the UK (or any RHD model) ie it’ll be the drivers side for us?? I only ask as I know when looking to buy a 034 X-Brace chassis reinforcement, they are LHD and RHD specific 🤔

[@andnich]

Great explanation. How do you change the oil pressure sensors on this diff? Ive got a sports diff error on my s5 cab

[@fcpeuro]

If we visit this again we will try and put something out for it!

[@slowgls]

Some one needs to add a dribble counter to this video. Lol. 😂

[@BilalAhmed-ye9qo]

Which one is differential & which one is transfer case? Lol , he mixed up.

[@Ac22768]

“I’m gonna go ahead and say ‘gonna go ahead’ about 900 times throughout this video.”

[@fcpeuro]

We could use a good word counter, you’re hired!