Faulty Gearbox???

[massimo]

Just after a bit of advice really - my 2017 SS 2.0TDI Manual Estate has devloped a fault with the gearbox, or at least I am being told thias by my local indi VW_AUDI specialist.

 

Car has covered 80K mile. Had DMF changed about 3K ago after clunking metallic sound heard from engine - this seemed to fix but noticed over time, still an issue.

Second DMF fitted, but again problem seemed to come back.

Garage now declaring its a gearbox fault - you can hear a metallic random rattling from the lower engine area, when stationary, but seems to disappear when driving (or get less).

The mechanic said that it might be a gear cog with a missing tooth and they would need to remove the gearbox and get repaired by a specialist. God knows at what cost!

He said that although the car is stationary, the gearbox drive shaft is still spinning in the box - really? Is that right?

I could understand if a DSG but mines a Manual box. Wiould this happen?

So am at a loss what to do next.

If they do the job, its going to be 6-10 day, I have to hire a car for work, but I am somewhat wary that I might be getting ripped off.

Any guidance would be most valuable and welcome.

TIA

 

 

[MrRich]

Hi,

 

Yes gearbox input shaft on will remain spinning if you are in neutral with clutch pedal up.  The gears on it just won't be engaged with the output.

 

Unless it's very loud, my personal view would be just keep using it and it might never worsen.  The only exception to this would be if it's an easy to access gear or bearing from a gearbox side case.  Whether this applies to this gearbox I do not know.

[ApertureS]

Personally… I’d be taking it somewhere else for a second opinion. WITHOUT giving them any prompts about other diagnosis’s.

 

So you’re saying when a new dual mass is fitted the sound goes away? But comes back how long after?

 

If there was a broken tooth on a gear then it would be there all the time…

[massimo]

12 hours ago, MrRich said:

Hi,

 

Yes gearbox input shaft on will remain spinning if you are in neutral with clutch pedal up.  The gears on it just won't be engaged with the output.

 

Unless it's very loud, my personal view would be just keep using it and it might never worsen.  The only exception to this would be if it's an easy to access gear or bearing from a gearbox side case.  Whether this applies to this gearbox I do not know.

Thanks for your reply. Yes on idle, you can clearly hear the random clattering from the gearbox - i'll see if I can post a video with sound, so you can hear.

[massimo]

2 hours ago, ApertureS said:

Personally… I’d be taking it somewhere else for a second opinion. WITHOUT giving them any prompts about other diagnosis’s.

 

So you’re saying when a new dual mass is fitted the sound goes away? But comes back how long after?

 

If there was a broken tooth on a gear then it would be there all the time…

Thats whats odd about it, its a random sound - it it was a broken cog or spline, I would expect I would hear this uniformly, so thinking of taking it elsewhere now for a second opinion.

[J.R.]

The garage replaced your DMF with an SMF, you are now hearing the resultant clatter from the laygear and the free running gears meshed with it.

 

Thats my diagnosis based on what you have said and assuming that you have a 6 speed probably 02M gearbox.

[massimo]

4 hours ago, J.R. said:

The garage replaced your DMF with an SMF, you are now hearing the resultant clatter from the laygear and the free running gears meshed with it.

 

Thats my diagnosis based on what you have said and assuming that you have a 6 speed probably 02M gearbox.

Ah, that might explain it. Is this a recommended change by Skoda then to a SMF, because of all the old DMF issues,  or have they speccd' the wrong item -

Just now, massimo said:

Ah, that might explain it. Is this a recommended change by Skoda then to a SMF, because of all the old DMF issues,  or have they speccd' the wrong item -

My gearbox is the 6-spd Man 02M according to the Owners manual.

 

[J.R.]

If they have fitted a SMF then they were making extra profit at your expense.

 

It can easily be verified by removing the starter motor.

[therams]

my mark lll 16 plate with 67k  manual is starting to make the same noise, skoda hull had it for a day but were guessing that  it could  be possible flywheel issue, nothing resolved yet just to keep an eye on it, 

[massimo]

6-months in and car still making a fair old rattle when stationary.

Depressing clutch does remove rattle so definately thinking it a gearbox issue with the freewheeling gears. 😏

[therams]

exactly the same with mine, noise decreases when clutch depressed at idle

[J.R.]

On 03/12/2022 at 18:51, J.R. said:

If they have fitted a SMF then they were making extra profit at your expense.

 

It can easily be verified by removing the starter motor.

 

Did you ever check to see if a standard (single mass) flywheel had been fitted?

[massimo]

Gearbox removed and taken to Transmission Specialist - no faults found - working perefectly well.

 

So fault with Valeo DMF.

 

Damage as follows:-

Faulty Clutch/DMF

2 x Gearbox Flanges £501.76 total

12 x Flange Bolts £23.76

1 x 04L141015 Clutch Kit £270.27

1 x S04L105266AF Flywheel £734.16

 

Ouch!!!!

 

Edited 11 July, 2023 by massimo