Front wheel drive s3

Rob2k68 · Oct 21, 2016

RedS3Reilly said:
So the s3 front wheel drive saga continues
Ready to fit replacement propshaft and realised that after further investigation that the original prop is fine, it's the transfer box that's fecked
Cars in good hands so hopefully back working for Friday evening

Are you all sorted now - did the transfer box sort the issue out ?

Having some Haldex woes on mine now ;o(

S3Alex · Oct 21, 2016

Rob2k68 said:
Are you all sorted now - did the transfer box sort the issue out ?

Having some Haldex woes on mine now ;o(

What's happened to yours?

Rob2k68 · Oct 21, 2016

S3Alex said:
What's happened to yours?

Got it on the dyno yesterday but the wheels were spinning up triggering a fault code (or ESP light?) and presumably throttling back power from how it was explained to me. I've had it breaking traction more easy than it possible should for the last few months so suspected something was either not working or on its way out. Just hope it doesn't snowball into diff or transfer box.

I'm at 22k mikes and reading that Haldex oil and filter change is recommended at 20k although need to check what my service book says as don't recall this being an official recommendation.

S3Alex · Oct 21, 2016

Rob2k68 said:
Got it on the dyno yesterday but the wheels were spinning up triggering a fault code (or ESP light?) and presumably throttling back power from how it was explained to me. I've had it breaking traction more easy than it possible should for the last few months so suspected something was either not working or on its way out. Just hope it doesn't snowball into diff or transfer box.

I'm at 22k mikes and reading that Haldex oil and filter change is recommended at 20k although need to check what my service book says as don't recall this being an official recommendation.

The Haldex seems easy enough to repair/service,but the transfer box is another thing altogether,as there are "no user serviceable parts inside",and when mine lunched itself we ended up buying a new one.

There are a good number of decent used ones on the market for all the cars,but there is an element of lottery to that of course(says the man who's just done that for his DSG conversion....)

Good luck.

MikeParkin · Oct 21, 2016

Is there a how to service Haldex etc any were ?

Rob2k68 · Oct 21, 2016

MikeParkin said:
Is there a how to service Haldex etc any were ?

There must be mate 'somewhere'. I've just been shown the repair kit it looks like an easy install a new unit the size of a tin of red bull a couple of seals, two bolts and an electrical connector for £180.

MikeParkin · Oct 21, 2016

Oh well, so we're looking at this at around the 20k mark for this kit or if the haldex is serviced earlier than I should be ok I suppose.

It's usually the filter that gets clogged up I think.

pburv · Oct 21, 2016

Was told by service desk in my local Audi that the service schedule for the haldex is at 40k....But getting it done sooner couldn't do it any harm at all..

A19quattro · Oct 21, 2016

So what broke on your Propshaft was it just he Doughnut that siezed or was there something else? I am interested as I have changed a few 8p doughnuts usually due to excessive vibration under power. You can buy them (Lemforder-OE or Febi-Bilstein) for about £100 now but a few years ago they were a dealer only part at over £300. Audi don't change them now as it's quicker to just replace the whole propshaft, at a similar cost to what you were quoted, be interested to know if they are up to the same old tricks on the 8V?

davc · Oct 21, 2016

pburv said:
Was told by service desk in my local Audi that the service schedule for the haldex is at 40k....But getting it done sooner couldn't do it any harm at all..

According to my service book the haldex oil change is 3 yrs, no mention of mileage. The Gen 4 on the 8p service was 38k miles.

I would take the stealer advice with a pinch of salt.

MikeParkin · Oct 21, 2016

Well I'd half them intervals if your modified also as your pushing it more that stock would.

gamegenie · Oct 22, 2016

Take the optimistic approach.

Think about all the fuel you're saving on your gasoline hungry S3 with it not running on all 4 wheels.

davc · Oct 22, 2016

I'd hardly call the S3 a gas guzzler.

RedRS3Reilly · Oct 24, 2016

Rob2k68 said:
Are you all sorted now - did the transfer box sort the issue out ?

Having some Haldex woes on mine now ;o(

Sent you a pm Rob, there was a mix up with the delivery address so my new transferbox has just finished a tour of the uk and has now landed today, getting fitted tomorrow

GSB · Oct 24, 2016

gamegenie said:
Take the optimistic approach.

Think about all the fuel you're saving on your gasoline hungry S3 with it not running on all 4 wheels.

I tested this on my old car, a Mazda 6 MPS (Mazdaspeed 6 in your neck of the woods @gamegenie). When running the space saver spare I had to pull the fuse for the haldex since the car was horrible to drive. The transmission would wind up due to the mismatched wheel diameters and it would actually crab along the road and scrub the tyres. Disconnecting the rear driveline cured this particular ill, and when the tyres were replaced I ran the car for while in front drive only mode. A bit of wheelspin if you provoked it, but an easy 3 to 5 mpg extra from a car that usually struggled to better 28mpg. So that's how I would run it for the regular trips from London to the South of France, no need for 4wd on the bright sunny autoroutes after all...

I don't know if you could do this so easily on a modern Audi though, the MPS 6 is a design from 10 or more years ago, and was a far simpler beast than the S3.

RedRS3Reilly · Oct 27, 2016

Update :

After a lengthy wait for the transferbox, it's here and it's been fitted along with some fresh oil and fresh dsg oil & filter.
The oil that came out the dsg box was pure black instead of clear/brown, the transferbox oil that was drained from the faulty one was metallic looking and had a very strong burnt smell from it( proof of the innards grinding away to pulp) , so basically if your modded please get fresh oil between 15-20k, it could save you a lot of money In the long run.
I unfortunately had a triple whammy. The prop donut split, the haldex pump filter blocked then seized the pump and transferbox gave up,

I've had a fresh set of tyres fitted yesterday too, just need the 4wheel alignment done as the subframe was dropped, that's another essential thing to do as it won't be aligned too well after refitting it.
Good luck to the others out there with similar issues, looking forward to enjoying a bit of power again after running about in my van over the last few weeks

RedRS3Reilly · Oct 27, 2016

A19quattro said:
So what broke on your Propshaft was it just he Doughnut that siezed or was there something else? I am interested as I have changed a few 8p doughnuts usually due to excessive vibration under power. You can buy them (Lemforder-OE or Febi-Bilstein) for about £100 now but a few years ago they were a dealer only part at over £300. Audi don't change them now as it's quicker to just replace the whole propshaft, at a similar cost to what you were quoted, be interested to know if they are up to the same old tricks on the 8V?

Yes mate the doughnut rubber separated from the steel

RedRS3Reilly · Oct 27, 2016

larbel said:
So the propshaft isn't really an issue? Should we still bother to replace the dog bone mount? I've read the 034 doesn't increase the NVH but is it really the case and still worth it?

I would still fit one to reduce any risks

RedRS3Reilly · Oct 30, 2016

RedS3Reilly said:
View attachment 106182 View attachment 106180 This is the 034 dogbone insert that reduces engine rock, therefore creating less stress and movement to the propshaft, simple and inexpensive, sometimes youve got to wonder why Audi design engineers get away with designing cars with weak spots!!!
This is a picture of underneath the car where the insert will be fitted and a pic of the insert that's needed to fill the large void.

Fitted 034 motorsport insert pic

S3 Turbo · Oct 30, 2016

RedS3Reilly said:
Update :

After a lengthy wait for the transferbox, it's here and it's been fitted along with some fresh oil and fresh dsg oil & filter.
The oil that came out the dsg box was pure black instead of clear/brown, the transferbox oil that was drained from the faulty one was metallic looking and had a very strong burnt smell from it( proof of the innards grinding away to pulp) , so basically if your modded please get fresh oil between 15-20k, it could save you a lot of money In the long run.

Glad to hear that you got it sorted finally!

Do I understand correctly that oil change is needed at TWO places, dsg oil and transfer box oil?

Is the transfer box oil as easy to change as the dsg oil??

Rupert49 · Oct 30, 2016

RedS3Reilly said:
I've currently got 500hp running through the front wheels only
Haldex pump has packed in!!!
Pretty scary doing wheel spins in 1,2,3,4th gear
Ordered a haldex repair kit, hoping that sorts the problem

I'm intrigued to know how you get 500bhp out of an S3. Mine's rated at 296bhp and is usually front wheel drive, unless it detects lack of cohesion, then the 4WD system kicks in.

What's the secret with your car, please?

GSB · Oct 30, 2016

Rupert49 said:
Mine's rated at 296bhp and is usually front wheel drive, unless it detects lack of cohesion, then the 4WD system kicks in.

No, it really doesn't. The AWD system is engaged very nearly all the time.

Rob2k68 · Oct 30, 2016

GSB said:
No, it really doesn't. The AWD system is engaged very nearly all the time.

Agreed. When it's not working then working again you can feel it pushing you along - it's a different car altogether.

A19quattro · Oct 30, 2016

Are you sure it separated completely? I fitted a new one to my car over a year ago and thought teh same when I was nder the car recently but on further inspection it was actually OK, just it moves more than the old siezed up ones I am used to. Granted I am some way short of 300BHP so maybe it is easier for your car to rip the sh1t out of it, Oh to be in that position

RedRS3Reilly · Oct 30, 2016

A19quattro said:
Are you sure it separated completely? I fitted a new one to my car over a year ago and thought teh same when I was nder the car recently but on further inspection it was actually OK, just it moves more than the old siezed up ones I am used to. Granted I am some way short of 300BHP so maybe it is easier for your car to rip the sh1t out of it, Oh to be in that position

Yes mate positive, sheared off the shaft and my transfer oil was metallic silver and smelled like burnt Metal

RedRS3Reilly · Oct 30, 2016

Rupert49 said:
I'm intrigued to know how you get 500bhp out of an S3. Mine's rated at 296bhp and is usually front wheel drive, unless it detects lack of cohesion, then the 4WD system kicks in.

What's the secret with your car, please?

To get to 500+ hp I've got the following list:
Forge intercooler
Vw r600 intake
Turbo technics intake pipe
Turbo technics hybrid turbo
4 bar map sensors
Autotec high pressure fuel pump
Miltek decat
Ngk race plugs
Turbo muffler delete
Gfb dv+
Dte pedalbox
Dsg remap
MRC custom stg3 ecu software

pepperisback · Oct 30, 2016

I hope the engine is able cope with this power

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RedRS3Reilly · Oct 30, 2016

pepperisback said:
I hope the engine is able cope with this power

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Yes
The motor is good for 550-600hp without forging it

RedRS3Reilly · Oct 30, 2016

S3 Turbo said:
Glad to hear that you got it sorted finally!

Do I understand correctly that oil change is needed at TWO places, dsg oil and transfer box oil?

Is the transfer box oil as easy to change as the dsg oil??

Yes two separate filling points and two different types of oils.
Not sure about ease of job as I leave these things to my mechanic as I'm dangerous with spanners

pepperisback · Oct 31, 2016

RedS3Reilly said:
Yes
The motor is good for 550-600hp without forging it

How does it feel to drive? Any comparison with other cars? 0-100 km/h and 100-200 km/h times?

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S3Alex · Oct 31, 2016

pepperisback said:
I hope the engine is able cope with this power

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It's torque that breaks engines and gearboxes.

500+bhp with sensible torque limits and a good smooth map should be doable.

S3Alex · Oct 31, 2016

RedS3Reilly said:
Yes mate positive, sheared off the shaft and my transfer oil was metallic silver and smelled like burnt Metal

Original transfer case on mine was full of metal filings......current one has lasted over 40k miles at 500bhp and above with no problems,which makes me wonder if the original was in some way defective,but no way of ever knowing that for sure.

A19quattro · Oct 31, 2016

Very nice, can't beat a bit of torque, very enjoyable and can do a bit of damage in more ways than one.

Front wheel drive s3

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