Hello everyone im hoping someone came across this problem before,its a bit of mystery no fault codes on the car not a single one,

when selecting reverse just to be clear the engine doesnt stall but it sort of jump bangs or clunks before it actually start reversing its doesnt do it all the time very often more if reversing to a slight uphill,please see the video with sound and help is appreciated Thank you😀

Car model: A6 45TFSI 2020 quattro

 

https://streamable.com/9yj7zl

Edited December 25, 2025Dec 25 by istvan11461
shared video url

Istvan.

All I see in the video is two red lights going backwards and forwards in the darkness, so not much help.

Is the transmission manual or automatic?

volume up please

Hello,please turn on the volume i have uploded to a different site,

S tronic dual clutch(dl382)

in the video when selescting reverse gear the car jumps 2 times and clunk is heard then it starts reversing

Thanks

21 minutes ago, cliffcoggin said:

see

 

Edited December 28, 2025Dec 28 by istvan11461

1 hour ago, istvan11461 said:

volume up please

Hello,please turn on the volume i have uploded to a different site,

Sorry, but no. That site demands too many permissions from me and wants to load innumerable cookies, hence I don't trust it.

The S-tronic gearbox is evidently the problem from your description. I suggest you get it serviced as it is sensitive to dirty oil and clutch wear.

8 minutes ago, cliffcoggin said:

Sorry, but no. That site demands too many permissions from me and wants to load innumerable cookies, hence I don't trust it.

The S-tronic gearbox is evidently the problem from your description. I suggest you get it serviced as it is sensitive to dirty oil and clutch wear.

allright then its not uploading on this website so cant show it to you,

yes gearbox been serviced 5k eariler then it supposed to no faults on gearbox, clutch is fine no  slippage, gearbox behaving as it should, i dont think its the gearbox 

thanks for help anyway 

 

Edited December 28, 2025Dec 28 by istvan11461

4 hours ago, istvan11461 said:

allright then its not uploading on this website so cant show it to you,

yes gearbox been serviced 5k eariler then it supposed to no faults on gearbox, clutch is fine no  slippage, gearbox behaving as it should, i dont think its the gearbox 

thanks for help anyway 

 

Hi depending on the milage it is possibly a rear engine mount.

Steve.

27 minutes ago, Stevey Y said:

Hi depending on the milage it is possibly a rear engine mount.

Steve.

mileage is 48k rn, is that would be able to stop the car to move in reverse? because when the clunk heard before it tryes to move back but it jumps and clunks then is start moving?

thanks😁

Engine/gearbox mounting issues? 

55 minutes ago, Magnet said:

Engine/gearbox mounting issues? 

update now accompanied with a ticking noise when reversing full lock both sides,the jump happens the same as before not every time i reverse,but the ticking it there now,

 

thoose are fine even if were bad thoose wouldnt restrict the car from reversing and causing a binding or a jump,been to dealership a week ago for a service i asked the technician when we did a testdrive to have a look at it he said he never seen this issue so far,uppon my collection they said that car been scanned no fault codes coming up on anything,which i knew because im scanning it at home often,the cars been up to date with servicing i really look after my car,

eariler this year i did the quattro binding juddering tsb on it, the awd clutch adaptation, plus as extra changed the rear diff oil too,

after did a gearbox software update also as i mentioned gearbox been serviced eariler as supposed to be, will put on ramp tonight,in friends garage, will check again the driveshafts,cv outers,not much idea because the suspension is good checked myself and in dealership aswell,

i understand it can be the quattro drivetrain specially because its  the ultra it can be a drivetrain tension causing a jump clunk when reversing because tyres rotate at different speed,but then other would have it aswell so not sure  

i will keep this post updated because this is very unusual issue,i will get to the bottom of this so next person dont need to chase this

if any idea from anyone what else to check tonight would be appreciated 

Thanks

 

I fear the cause of the issues are not going to be resolved via. here, since no one has access to the vehicle to carryout eliminating inspections, so any attempts to do so can only be guesses.

It seems you are fully equipped with the facilities and experience needed to isolate the culprit/s

Yes, please let us know the outcome.

Regards,

Gareth. 

5 hours ago, istvan11461 said:

update now accompanied with a ticking noise when reversing full lock both sides,the jump happens the same as before not every time i reverse,but the ticking it there now,

 

thoose are fine even if were bad thoose wouldnt restrict the car from reversing and causing a binding or a jump,been to dealership a week ago for a service i asked the technician when we did a testdrive to have a look at it he said he never seen this issue so far,uppon my collection they said that car been scanned no fault codes coming up on anything,which i knew because im scanning it at home often,the cars been up to date with servicing i really look after my car,

eariler this year i did the quattro binding juddering tsb on it, the awd clutch adaptation, plus as extra changed the rear diff oil too,

after did a gearbox software update also as i mentioned gearbox been serviced eariler as supposed to be, will put on ramp tonight,in friends garage, will check again the driveshafts,cv outers,not much idea because the suspension is good checked myself and in dealership aswell,

i understand it can be the quattro drivetrain specially because its  the ultra it can be a drivetrain tension causing a jump clunk when reversing because tyres rotate at different speed,but then other would have it aswell so not sure  

i will keep this post updated because this is very unusual issue,i will get to the bottom of this so next person dont need to chase this

if any idea from anyone what else to check tonight would be appreciated 

Thanks

 

Hi check for movement side to side and backward and forward on the transfer box shafts and prop joints.

Steve.

On 12/29/2025 at 5:17 PM, Stevey Y said:

Hi check for movement side to side and backward and forward on the transfer box shafts and prop joints.

Steve.

ticking noise that was front brake pads easy fix,

but the big mystery reverse gear bang/clunk solved, after lifting the car up i checked everything as suggested propshaft joints brakes engine mounts all in perfect order, booked again an appointmet to dealership took few videos beforehand because it happens occasionally and i knew they might not be able to reproduce it if i leave my car again so i had a very good master technician working on car also asked for a testdrive so i could speak to him and show the video i took, he straight away knew the problem, he said that its a dual clutch 1 clutch responsible for reverse gear might be off and the kissing points need to be adjusted also performed a basic reset on gearbox since then 2 weeks now not a single time happend, i did try to force it cold start quick shift from d to r, but didnt happen since the adaptation, 

 

see the report 

 

Hope it helps to someone in future