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DSG DMF Failure and Replacement

anotero

Autocross Newbie
Location
SoCal
Has anyone here had their DMF replaced? What were the failure symptoms? Did you replace with another DMF or did you go single mass? How much did it cost you?
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
I didn't know that you could replace it. I thought that any DSG problems required a new DSG since nobody rebuilds them. What are you experiencing to ask that?
 

anotero

Autocross Newbie
Location
SoCal
I didn't know that you could replace it. I thought that any DSG problems required a new DSG since nobody rebuilds them. What are you experiencing to ask that?
You can replace the flywheel without getting a new trans. The VW engine service manual documents the procedure for removing and installing a flywheel.

I have a metallic rattle (like a coin in a dryer) on a cold engine when taking off in 1st and 2nd when giving light throttle. The instant I rev to higher RPMs, sound's gone. Don't hear it at any other time. Taking it to a shop tomorrow to diagnose (not a lot they can do -- will just have to listen).
 

jimlloyd40

Autocross Champion
Location
Phoenix
Car(s)
2018 SE DSG
You can replace the flywheel without getting a new trans. The VW engine service manual documents the procedure for removing and installing a flywheel.

I have a metallic rattle (like a coin in a dryer) on a cold engine when taking off in 1st and 2nd when giving light throttle. The instant I rev to higher RPMs, sound's gone. Don't hear it at any other time. Taking it to a shop tomorrow to diagnose (not a lot they can do -- will just have to listen).
Thanks. Learn something new everyday in the forum.
 

anotero

Autocross Newbie
Location
SoCal
Thanks. Learn something new everyday in the forum.
Moreover, DSG clutchpacks can also be replaced. I think complete DSG replacement is necessary when the gears themselves are gone.
 

Agray

Ready to race!
Location
Washington
I have a metallic rattle (like a coin in a dryer) on a cold engine when taking off in 1st and 2nd when giving light throttle. The instant I rev to higher RPMs, sound's gone. Don't hear it at any other time. Taking it to a shop tomorrow to diagnose (not a lot they can do -- will just have to listen).
Got a video clip of the sound? I have something similar but only hear it in first gear when the trans is cold. Once it’s warm it goes away. In fact, haven’t heard it since a while since the weather has warmed up.. Any codes?
 

anotero

Autocross Newbie
Location
SoCal
Got a video clip of the sound? I have something similar but only hear it in first gear when the trans is cold. Once it’s warm it goes away. In fact, haven’t heard it since a while since the weather has warmed up.. Any codes?
No codes. Car pulls fine at WOT, gears engage (I drive exclusively in manual mode). No video clip. Maybe will get it tomorrow. The sound is something between the balls in a ball bearing bouncing around a tin can and a heat shield vibrating.
 

daconchslop

Drag Racing Champion
Location
South Carolina
I am thinking that this is the nature of the beast after being concerned for 30k miles and everything is still functioning well, lol. More so pronounced with BFI Stg2 mounts.
When I engage Reverse is when I hear it most. For my car, if I lift off brake only
enough to allow the clutch to engage before fully releasing the brakes, will it then sound much less rattly.
 

anotero

Autocross Newbie
Location
SoCal
I am thinking that this is the nature of the beast after being concerned for 30k miles and everything is still functioning well, lol. More so pronounced with BFI Stg2 mounts.
When I engage Reverse is when I hear it most. For my car, if I lift off brake only
enough to allow the clutch to engage before fully releasing the brakes, will it then sound much less rattly.
I don't doubt it's something I can live with for a little bit, but I've read about catastrophic flywheel failures that damage adjacent clutches. I definitely don't want it to come to that.

You say 30k miles -- when did it start?
 

drrck

Go Kart Champion
Location
Zeeland, MI, USA
DMF failure in DSGs are not common that I've seen in MK7. In prior generations it would get so bad that the shifter would vibrate back and forth. Most DSGs make that ringing noise in my experience, and I wouldn't worry too much about it.
 

anotero

Autocross Newbie
Location
SoCal
Sure it isn’t wastegate rattle?
Absolutely not sure, but I could not find a good video of what the wastegate rattle sounds like.
 

anotero

Autocross Newbie
Location
SoCal
DMF failure in DSGs are not common that I've seen in MK7. In prior generations it would get so bad that the shifter would vibrate back and forth. Most DSGs make that ringing noise in my experience, and I wouldn't worry too much about it.
My car has been fine save for a leaking thermostat/water pump. *knock on wood* I would be surprised if absolutely nothing would go bad at my mileage.
 
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