Hi all I have crunching when I pass the second gear. The phenomenon appears just at the beginning; and disappears after some kilometres. I changed the clutch kit, the gear oil, and also the cables adjustment. Unfortunately things are the same.

Thanks in advance

 

 

Edited 16 February, 20215 yr by cheezemonkhai
Fixed the typo for clarity

Do you mean crunching? If so it sounds like a weak synchromesh on 2nd gear. How many miles/kilometres has your Octavia done?

Hi this is what I meant: Crunching! My car has done 95000 Kms it is 2015 Octavia model.

 

 

I tend to sit on the toilet... 

 

 

 

 

 

sorry... not sorry, couldnt help myself

 

Agree with PetrolDave, try taking a tad longer on the shift, like holding the gear lever at the pressure point and letting it fall into gear when its ready so to speak. If it doesnt do it then that confirms it.

Indeed, if I take some time to pass the second, th phenomenon does not appear. And this is what I do to avoid it. But after miles, I can drive normally as no thing was.

Regarding the oil when you changed, which oil did you use?

On a mk2 I found that aftermarket oil (Which usually was very good) just didn't seem to get on with the box and caused slightly rough gear changes.

Drained and back to VW oil and all was fine.

 

Other than that and checking that the clutch is bled, I'm not sure I have anything useful to add sadly.

Which kind of oil is suitable for this car?

 

 

39 minutes ago, Madani said:

Which kind of oil is suitable for this car?

 

 

I ended up going to the Skoda dealer supplied oil and have to be honest was very surprised when it made everything smooth again.

I don't know what the spec is for the MK3, but it wouldn't hurt to make sure you are using the right oil, or just go and get some from the local main dealer.

Can we have the oil spec from the internet, or the Skoda website?

23 hours ago, cheezemonkhai said:

I ended up going to the Skoda dealer supplied oil and have to be honest was very surprised when it made everything smooth again.

I don't know what the spec is for the MK3, but it wouldn't hurt to make sure you are using the right oil, or just go and get some from the local main dealer.

I used liqui moly oil. It is designed for gears according to the supplier, and also this is what it is written on the bottle

You need to care more about the grade of the gear oil...

 

As an example:

 

These are some of the VW grades:

https://www.opieoils.co.uk/c-743-vw.aspx

 

These are the grades for a 2015 2.0TDI (110kw) - Different ones for different gearboxes:

 

https://www.opieoils.co.uk/f/706233/24340/2015/gearbox-oil.aspx

 

 

EDIT:

 

You will see the specifications on each oil:

 

https://www.opieoils.co.uk/p-184755-febi-bilstein-75w-gearbox-oil-manual-transmission-fluid-gl-4-21829.aspx?VariantID=296272&vehicleid=24340&yearfilter=2015&providerpartid=47168633&genericpartid=3225&providerpartlinkid=411846725&partsgroupid=706233&genericpartname=Manual Transmission Oil

 

You need to make sure the oil have the correct VW specification for your gearbox.

 

Edited 18 February, 20215 yr by cheezemonkhai

Just as an FYI, i looked on the liquid Moly site and they do not list the skoda octavia mk3 (2015) in their product selector.

The closest oil I could find was for a mk2 with manual gearbox (5/1), which was this:

 

https://products.liqui-moly.com/top-tec-mtf-5100-75w-7.html?___store=limo_b2b_com_en&___from_store=limo_b2b_com_en

 

Whilst that meets some VW standards, they may not be the same as your car needs and if they do not there is a real risk of premature failure of the gearbox.

 

I would have a look and find what specific VW standard your car needs (May be in the manual) and then if your existing oil is not correct, purchase the correct oil and drain/replace the oil.

 

If nothing else it will have been a gearbox oil flush, but the longer you drive it with the wrong oil, the greater the risk of damage.

+1 for the above - the 'liquid moly' reference rings an alarm bell too, if the oil used has any friction-modifier additive in it I can easily see where gearbox syncro-hub operation could be adversely affected. 

On 18/02/2021 at 18:24, Warrior193 said:

+1 for the above - the 'liquid moly' reference rings an alarm bell too, if the oil used has any friction-modifier additive in it I can easily see where gearbox syncro-hub operation could be adversely affected. 

I think it is not the right oil I used. I will check, I still have the bottles

9 hours ago, Madani said:

I think it is not the right oil I used. I will check, I still have the bottles

On the bottle it is written 75W-90. And it says that it is designed for gear boxes

Does it claim to help reduce friction or make any seemingly too good to be true claims?

 

I think the VW one is a fully synthetic oil and fixed viscosity. I can’t remember but 75 rings a bell,

 

The one I used in my mk2 was a really good oil and met the correct standard but was 75w-80 or 75w-90. As I said that caused similar problems to yours which all went away with the correct oil from the main dealer.

6 hours ago, cheezemonkhai said:

Does it claim to help reduce friction or make any seemingly too good to be true claims?

 

I think the VW one is a fully synthetic oil and fixed viscosity. I can’t remember but 75 rings a bell,

 

The one I used in my mk2 was a really good oil and met the correct standard but was 75w-80 or 75w-90. As I said that caused similar problems to yours which all went away with the correct oil from the main dealer.

Hi;

A fixed oil viscosity is the desired oil's parameter. And I think in my case the viscosity is the only thing that can change after miles, as it heats up. I will try to put the original oil and see the results

On 17/02/2021 at 15:55, cheezemonkhai said:

Regarding the oil when you changed, which oil did you use?

On a mk2 I found that aftermarket oil (Which usually was very good) just didn't seem to get on with the box and caused slightly rough gear changes.

Drained and back to VW oil and all was fine.

 

Other than that and checking that the clutch is bled, I'm not sure I have anything useful to add sadly.

I experienced exactly the same on a previous car.

 

Had a Seat Cordoba 1.9 TDI with the same issue. I did a gear oil change using some aftermarket oil. It was a marginal improvement and the old oil was horrible and black. But it still crunched.

 

Bought the genuine VAG oil and it was smooth as butter! The crunch was gone!

On 17/02/2021 at 03:15, Madani said:

Indeed, if I take some time to pass the second, th phenomenon does not appear. And this is what I do to avoid it. But after miles, I can drive normally as no thing was.

My car has always been like that. When I first set off and I hurry the gear change into second there is a slight crunch. If I slow down the change it doesn't crunch. Worse when the air temperature is cold. 

On 21/02/2021 at 14:59, durhamfisher said:

My car has always been like that. When I first set off and I hurry the gear change into second there is a slight crunch. If I slow down the change it doesn't crunch. Worse when the air temperature is cold. 

Is it still like that, or did you try any action to solve the issue???

4 hours ago, Madani said:

Is it still like that, or did you try any action to solve the issue???

When I first bought the car it had 16k miles on it and was quite noticable. I never did anything about it, never thought that it was an issue really. 3 years later its got 61k and its been fine. I have probably changed my driving style so I'm slightly slower into second so it doesn't crunch.

On 21/02/2021 at 08:41, Phil-E said:

I experienced exactly the same on a previous car.

 

Had a Seat Cordoba 1.9 TDI with the same issue. I did a gear oil change using some aftermarket oil. It was a marginal improvement and the old oil was horrible and black. But it still crunched.

 

Bought the genuine VAG oil and it was smooth as butter! The crunch was gone!

Was the crunch on the second gear or all ??

Hi all

Thank you for your help! 

I changed again the oil of the gear box with the original one. Things are much better! And now the gears are passing fine

On 15/02/2021 at 05:03, Madani said:

Hi all I have crunching when I pass the second gear. The phenomenon appears just at the beginning; and disappears after some kilometres. I changed the clutch kit, the gear oil, and also the cables adjustment. Unfortunately things are the same.

Thanks in advance

 

 

 

Okay - for non FL cars manual cars, there are a couple of things you can do:

 

1) Get the gearbox oil changed.  Ignore Skoda who say that it is oil for life - nonesense.  I would recommend getting the manual gearbox oil change done every 40-50k.  This will make the gearbox sweet as a nut again.

2) Get the clutch and gear level positioning checked.  Any issues with thrust bearings or the clutch not fully dis-engaging the clutch will cause problems.

 

In all fairness for VAG manual gearboxes, this is normal on non-Facelifted Octavias.  When the gearbox is cold, just be patient between first to second gear.  Be thankful that you don't have a 4x4 manual, which I had on my 2016 Scout, because the extra cardan shaft exerted extra pressure onto that gear making it a nightmare when cold.  You'll notice that Skoda stopped selling manual 4x4's from 2016 onwards (I had one of the last).