Hello 

I posted a few comments several weeks ago about rear noise on my Yeti.

Yes, noise is still there!

Just to re-cap on what I have done so far.

Fitted;

Both rear wheel bearings. 

Both rear brake discs and pads.

Changed oils in the diff and Haldex.

Cleaned Haldex filter.

Fitted flexible drive coupling between Haldex and prop shaft.

Swapped tyres back to front on same side.

"rotational"  noise that can definitely be heard starts at 35-40 mph. When under power or coasting.

It seems to come from the OSR area.

Noise seems to reduce at greater speeds, or is this being masked by general vehicle noise?

Yeti has michelin primacy 4 tyres all round with about 5mm tread with even wear.

I have had tyres checked at my local tyre centre.  they reported no issues.

I suppose this leaves the diff or haldex unit for investigation.

Looks like a trip to the Skoda garage to see what they say.

Unless anyone out there can offer any suggestions.

I'd be grateful for any thoughts regarding this problem you may have.

Regards.

 

I just read your earlier post about the noise..

The only thing I can think of is the tyres.

I see you have changed them F-R but is there anyway you can fit another set of wheels, no matter what the tyres are like.

It will be only for testing.

Without hearing the noises its very difficult to know.

What did the diff and Haldex oils look like when they were drained?

 

Hello 

Oils looked good 

A small amount of sludge around Haldex filter.  Also oil levels were good.

6 minutes ago, Carlodiesel said:

I just read your earlier post about the noise..

The only thing I can think of is the tyres.

I see you have changed them F-R but is there anyway you can fit another set of wheels, no matter what the tyres are like.

It will be only for testing.

Without hearing the noises its very difficult to know.

Hello

Yes I've read a lot of comments about tyres on this site

I can't think of anybody near me whith wheels unless I go to a breakers or maybe ebay.

I was wondering about using the space saving spare wheel I have.  Fitting it initially to the ROS?

Regards.

7 minutes ago, poseidon said:

A small amount of sludge around Haldex filter.

Was it cleaned?

@poseidonEven if the same tyres / brand at the front why not try swapping front wheels / tyres with the rears.

?

Does increasing or dropping the tyre pressures by a few PSI change the noise?

 

EDIT.

Sorry missed the 'Already been changed F for R.

Edited 28 July, 20214 yr by e-Roottoot

Hello

Yes, cleaned with degreaser and blow dried.

Regards

Quote "was wondering about using the space saving spare wheel I have.  Fitting it initially to the ROS"

Yes try it. If still there try to N/S. Its a question of illimitation.

Hello 

Thanks I’ll give it a try .

Any ideas for a suitable low noise tyre.  Won’t be used off road ?

regards 

5 minutes ago, poseidon said:

Any ideas for a suitable low noise tyre.

The "noise rating" of tyres is based on "drive by noise", not in car.

Ok 

Thanks.

5 hours ago, KenONeill said:

The "noise rating" of tyres is based on "drive by noise", not in car.

The Goodyear Efficient grip tyres has one of the lowest in cabin noise ratings, or even better go for the Goodyear Vector 4 seasons Gen3 tyres. I’ve got them on my Yeti and they most certainly provide a quiet cabin plus they give a more compliant comfortable ride. And, of course, being an all year tyre you are taken care of in summer and winter.

 

Thanks for your thoughts.

I'll go shopping for some tyres.

Just a thought - the hard plastic rear shock cover often breaks and slides down the shock until it sits on the bracket. 

 

The noise this made on my old Touran was amazing as it sounded all around the back of the car, and it was road speed. 

Hello 

No, everything is good. 
I’ve also had a good look at suspension bushes etc. nothing looks worn or out of place.

Regards 

23 hours ago, poseidon said:

I have had tyres checked at my local tyre centre.  they reported no issues.

I hope you didn't take my reply as to mean replace the tyres with new ones...

Don't replace them if its not needed.

Just try the Spare wheel first.

It's a question of illimitation.

Hello

No I understood what you meant.

Technician at tyre centre suggested an issue called bladeing (like rubbing your finger over a fishes scales rough one way smooth the other).

He couldn't confirm this problem with my tyres.

My car is fitted with Michelin primacy 4 tyres.  With between 5 and 6 mm on all four tyres.

Tyre centre said they were quality tyres?

Regards.

 

37 minutes ago, poseidon said:

Technician at tyre centre suggested an issue called bladeing

More usually called "saw-toothing" IME.

 

Yes, Michelin are quality brand name tyres, but saw-toothing is an artefact on rear tyres caused by hard braking.