I've got a 2016 Octavia Scout. A persistent noise from the rear of the car has been traced to the rear differential (after replacing both rear bearings, changing tyres, changing the Haldex oil and the rear differential oil). Local Skoda says the diff is a sealed unit so only option is replacement, and have quoted me 6500 quid. So first question is should this be covered by standard warranty? I don't think so but wanted to check. Second question is whether a garage could open it up and repair it or whether I do indeed a whole new unit. In which case, would it be reasonable to get a second hand one and have my local (cheaper, non-Skoda) garage fit it? Thanks for any advice! 

Welcome.

 

What Warranty have you got. One as a Used Car or something? 

 

@ what miles was the rear diff oil changed at and by who and why was that done, just because of the noise?

 

Was it done wrongly? 

 

Others have got used ones.

There are threads in the Yeti Section.  Usually needed after someone serviced the diff wrong when the Haldex was serviced.

 

Maybe @J.R.could comment, or there are other that might be along.

 

There are places which are not HAWCO you could no not that far with proper mechanics, maybe in Nairn. http://bitzgarage.co.uk

 

Proper Skoda servicing, repair and maintenance, probably best in Scotland, but a few miles away, worth it though.

http://victoriagarage-maud.co.uk

 

 

 

http://briskoda.net/forums/topic/498884-yeti-rear-differential-seized

 

Edited 16 December, 20223 yr by toot

Seems you will not be alone.

 

6500.  Well then, merry Christmas! 

 

Could be woth phoning a specialist transmission/ differential place but rebuilding it according to this one thread comment is limited.

 

https://www.pistonheads.com/gassing/topic.asp?h=0&f=86&t=1976055

 

It sounds as if the garage couldn't quite work out what was causing it and having changed other things the diff is the only thing left.

 

Going back to first principles though what is the noise you are hearing, when does it happen, does it change at all and if so when does it do that.

 

The rear drive isn't silent as there is a drive shaft going to the back so often that can be heard especially if there is some wear in the donut joint meaning there is noise when taking up drive or it can have a slight noise as it rumbles along.

 

Cheers

 

 

10 hours ago, 3rdoctavia said:

It sounds as if the garage couldn't quite work out what was causing it and having changed other things the diff is the only thing left.

 

Going back to first principles though what is the noise you are hearing, when does it happen, does it change at all and if so when does it do that.

 

The rear drive isn't silent as there is a drive shaft going to the back so often that can be heard especially if there is some wear in the donut joint meaning there is noise when taking up drive or it can have a slight noise as it rumbles along.

 

Cheers

 

 

Good points. Start at the basics again. Mine certainly isn't totally quite even on light throttle, trailing throttle I get hydraulic sort of noises fade in and out. Possibly to do with pump pressure regulation.  I notice them, my wife has never really noticed them. Different people have different attention levels.   

 

What sort of noise is it? 

Edited 17 December, 20223 yr by TheClient

Thanks for replies. 

 

I think the noise started around 6 months ago. Came on over a period of a few weeks, I think, but hasn't really got any worse since, which is of some reassurance, hopefully. 

 

It is there whenever the car is moving and varies in pitch and loudness depending on the speed of the wheels. It's there whether or not the clutch is engaged and whether or not the engine is on. It doesn't vary at all in response to acceleration, braking or cornering. Definitely from the rear. Some back seat passengers have thought a bit more from the right than the left but I'm not convinced about that. 

 

I got my garage to check it over a few months ago and they couldn't find anything wrong. At its service a month back, they thought the rear left bearing was a bit noisy and changed that, but no difference. Tyres were changed at that point too as they needed it anyway. I then wondered if it might be the rear right bearing and/or the Haldex (last Haldex oil change had been around 30,000 miles/2 years ago). So they changed the right rear bearing and both the Haldex oil and rear diff oil. They didn't see anything that led them to think any issues with either. It then needed to go to Hawco Skoda anyway to get a new key coded so I asked them to see if they could figure it out. 

 

One thing I'd thought of is whether it could be some sort of cabin sound insulation issue but neither garage reckons there's an issue there. 

 

No impact on driving or fuel efficiency. 

 

So I'm thinking maybe just leave it for now, given that it hasn't been getting worse over the last 4 months or so. 

 

What do you reckon? 

Change the Guibo coupling, its purpose is to reduce driveline NVH.

16 minutes ago, adamarchie said:

It doesn't vary at all in response to acceleration, braking or cornering.

 

That does not sound like a worn differential. Assuming that you had not had a Haldex service done shortky before the noise started and that when the diff oil was drained it was not discoloured and did not have metallic debris then I would be confident that it does not need a new differential, I would have zero confidence in the diagnosis by the Skoda dealer.

 

I could be wrong, it will cost you £6500 to tell me so!!!!

 

A second hand diff would be a lot cheaper, they were between £200 and £400 when I was looking, I would not even spend that and the labour on the basis of what you have said, I would replace the Guibo coupling which should have been the first thing the garage did.

 

Please update if it does or does not resolve the problem, why? because after damaging my diff by draining the wrong fluid I still have some transmission noise just like yours, I bought a Guibo coupling but have yet to fit it as on second inspection I decided that mine was not actually fractured, the split line is intended and is present on the new one, nonetheless the new one may result in noise reduction, its a difficult job that I have been putting off.

 

In response to the question in your thread title, what "standard warranty" do you believe that you have on a 6 year old vehicle?

Edited 17 December, 20223 yr by J.R.

Whne you are at standstill and you lift the clutch take up drive (just enough for the car to lurch forward a but do you hav any noise then, like a slight clunk from the rear . I get that from play in a slightly worn donut joint conn3cting the drive shaft to the rear diff/ axle. This gives a bit of a hum from the rear when driving along as I suppose the slight looseness translates a vibration noise when driving.

I still think the haldex/diff scares dealers a bit as its a bit of a mystery that they arnt allowed to mess on with other than a complete swap and many techs aren't daily drivers of quaytro cars so may not be familiar with its daily noises.

Just to clarify for the OP... Guibo and donut are the same thing. Like a rubber joint to take up some of the shock from the drive shaft to the diff.

@adamarchie

The Haldex Service Schedule is @ 3 years / 30,000 miles or sooner.  

That is to be done correctly, not just an oil change.  

?

So does it get cleaned out?

 

Rear driveshaft coupling.

http://briskoda.net/forums/topic/501865-drive-shaft-diff-coupling/page/2

 

Edited 17 December, 20223 yr by toot

25 minutes ago, toot said:

@adamarchie

The Haldex Service Schedule is @  / 30,000 miles or sooner.  

That is to be correctly, not just an oil change.  

?

So does it get cleaned out?

 

Rear driveshaft coupling.

http://briskoda.net/forums/topic/501865-drive-shaft-diff-coupling/page/2

 

Don't know what happened there but tried to say that Toot makes a good point.

 

Skoda dealers won't strip the haldex to clean the  internal filter as skoda reckons this isn't needed. A good indie garage will do this as they know it gets gunked up.

Bare with me on this... 

 

Until recently I had a land rover freelander 2, now LR in their infinite wisdom speced the input shaft bearing in the diff a few sizes too small so they wear out, this gives a lovely whine noise when failed not to dissimilar to a to a fubared diff... so worth a listen if you can get the car on a ramp with it in gear. 

 

From my info the early Disco Sport and E-joke models they produce, seem to have exactly the same issues before they moved from Haldex with the more recently made ones, so they are running version 4&5 versions of haldex.

 

and now to  the point. 

 

These Guys have been sorting Haldex systems and associated transmission rebuilds for a while , I've personally used them on my old freelander 1 as they fitted a new PTU unit  and countless Freelander 2 owners on the LR forums have been to them for their diffs and pinion bearings rebuilds and replacements

 

if you can diagnose where the noise is coming from within the back end I'm sure these guys could help you. long drive from Scotland but worth it if they help sort it for you. 

 

https://www.bellengineering.co.uk/contact-us

They are good and i have recommended them on Difflock forum for many years.

Not necessary to travel that far though if @adamarchiedoes need a rebuild. 

There are good transmission engineers around Scotland and one of the best is just 1 mile away from me.  Still not in the Inverness area, but then plenty Motorsport / Rally, Comp Safari etc engineers and Mechanics around the Moray Firth area. 

oh I've know doubt there are equally good firms north of the border, I know Bell do postal exchange units for the LR's so might do for his diff is he cant find somewhere more local. 

 

My own back end is whining in my elegance 4x4 a little at the moment  its had a full H/D and Diff oil service recently with oils from Auto fault finder in Crewe , not 100% sure if its diff area or wheel bearings as it doesn't change tune with weight loading in the bends either but as I've had several wheel bearings not be affected by loading before I'm not ruling them out ( and tbh its not been the weather to get the jack out either!) 

 

On subject of warranty.. read the small print.

 

I did have a Disco 3 some years ago,  which i took out warranty in a just in case scenario, the electric hand brake failed and wasn't covered, even though they warranty specifically said it the covered the hand brake.. several months of arguing which ended with a nice £943 bill. 💩

I had the rear diff fail a year ago I feel it’s down to the fact that even when Haldex is serviced dealer never change or advise the changing of the rear diff oil looking back at the dockets from day one

Not a chance, the differential would do ten million miles without ever changing the oil it was filled with from the factory, or between 10 and 1000 miles after the Haldex was serviced by someone indiscriminate in their choice of orifice! 😆

Edited 25 December, 20223 yr by J.R.

On 17/12/2022 at 12:32, adamarchie said:

Thanks for replies. 

 

I think the noise started around 6 months ago. Came on over a period of a few weeks, I think, but hasn't really got any worse since, which is of some reassurance, hopefully. 

 

It is there whenever the car is moving and varies in pitch and loudness depending on the speed of the wheels. It's there whether or not the clutch is engaged and whether or not the engine is on. It doesn't vary at all in response to acceleration, braking or cornering. Definitely from the rear. Some back seat passengers have thought a bit more from the right than the left but I'm not convinced about that. 

 

I got my garage to check it over a few months ago and they couldn't find anything wrong. At its service a month back, they thought the rear left bearing was a bit noisy and changed that, but no difference. Tyres were changed at that point too as they needed it anyway. I then wondered if it might be the rear right bearing and/or the Haldex (last Haldex oil change had been around 30,000 miles/2 years ago). So they changed the right rear bearing and both the Haldex oil and rear diff oil. They didn't see anything that led them to think any issues with either. It then needed to go to Hawco Skoda anyway to get a new key coded so I asked them to see if they could figure it out. 

 

One thing I'd thought of is whether it could be some sort of cabin sound insulation issue but neither garage reckons there's an issue there. 

 

No impact on driving or fuel efficiency. 

 

So I'm thinking maybe just leave it for now, given that it hasn't been getting worse over the last 4 months or so. 

 

What do you reckon? 

Hey, newbie here! I know this was a long time ago but I have the exact same issue and live in Inverness too. 2016 Scout. Did you ever find a resolution?

Thank you!