Hey guys,
I recently had my S4's mechatronic circuit board replaced under TPI 2022497/18. Since then the car generally drives far smoother, but i'm still worried that my gearbox isn't operating properly. I have read all the DSG problem threads and taken what I can from them. However I've never had the chance to drive another S4 or s-tronic equipped audi, so i'd really appreciate your thoughts/experiences on my DSG symptoms:
The problem i'm having is with a specific type of 3-2 downshift. It might sound at first like the typical DSG jerkiness, but because that disappeared after the mech circuit fix i think it might be something else. What happens is that the downshift between 3-2 pauses longer than usual before clutch engagement (pause is probably 0.5s, but feels longer), followed by a harsh and very rapid clutch engagement. It isn't quite as bad as being rear-ended and it doesn't 'clunk', but it sticks out like a sore thumb compared to 'normal' shifts.
However this symptom happens ONLY during a specific combination of driving conditions and accelerator inputs. Roughly like this: coasting down off throttle (or braking) as the downshift initiates, combined with getting on the throttle BEFORE the clutch engages 2nd. This is a frequent scenario driving where I live - say turning off a main road, coasting up to a light which then turns green etc. It happens occasionally in sport/dynamic, but i can also consistently replicate it in manual mode.
Although i wouldn't normally shift in this sequence under manual control, it can't be avoided in automatic mode. Can someone else try this out on their S4 to see what it does?
1. Coasting or braking lightly in 3rd (off throttle), let engine speed drop to roughly 1500-2000 rpm.
2. Downshift to 2nd (still off throttle).
3. Just after shift initiates (i.e. gear indicator changes in dash) BUT BEFORE the clutch engages get on the throttle (not flooring it but with clear intent to pull away).
4. DSG seems to pause (maybe 0.5s longer than normal shift but feels like forever when trying to accelerate), then engages the clutch harshly and takes off.
The pause is what makes this downshift really annoying, because you feel like the car is stalling just before it takes off. It happens to some extent for any gear combination when following this order of shift & throttle inputs, but in my car 3-2 is the most harsh. Sometimes the pause is slightly shorter, sometimes slightly longer - feels pretty random but when you get a long one it is really annoying.
Has anyone else experienced this (or does your car not do it)? If anyone would be willing to try this out on their DSG and get back to me i'd be really grateful.
thanks
Ant
Couple pics from after the repair:
I recently had my S4's mechatronic circuit board replaced under TPI 2022497/18. Since then the car generally drives far smoother, but i'm still worried that my gearbox isn't operating properly. I have read all the DSG problem threads and taken what I can from them. However I've never had the chance to drive another S4 or s-tronic equipped audi, so i'd really appreciate your thoughts/experiences on my DSG symptoms:
The problem i'm having is with a specific type of 3-2 downshift. It might sound at first like the typical DSG jerkiness, but because that disappeared after the mech circuit fix i think it might be something else. What happens is that the downshift between 3-2 pauses longer than usual before clutch engagement (pause is probably 0.5s, but feels longer), followed by a harsh and very rapid clutch engagement. It isn't quite as bad as being rear-ended and it doesn't 'clunk', but it sticks out like a sore thumb compared to 'normal' shifts.
However this symptom happens ONLY during a specific combination of driving conditions and accelerator inputs. Roughly like this: coasting down off throttle (or braking) as the downshift initiates, combined with getting on the throttle BEFORE the clutch engages 2nd. This is a frequent scenario driving where I live - say turning off a main road, coasting up to a light which then turns green etc. It happens occasionally in sport/dynamic, but i can also consistently replicate it in manual mode.
Although i wouldn't normally shift in this sequence under manual control, it can't be avoided in automatic mode. Can someone else try this out on their S4 to see what it does?
1. Coasting or braking lightly in 3rd (off throttle), let engine speed drop to roughly 1500-2000 rpm.
2. Downshift to 2nd (still off throttle).
3. Just after shift initiates (i.e. gear indicator changes in dash) BUT BEFORE the clutch engages get on the throttle (not flooring it but with clear intent to pull away).
4. DSG seems to pause (maybe 0.5s longer than normal shift but feels like forever when trying to accelerate), then engages the clutch harshly and takes off.
The pause is what makes this downshift really annoying, because you feel like the car is stalling just before it takes off. It happens to some extent for any gear combination when following this order of shift & throttle inputs, but in my car 3-2 is the most harsh. Sometimes the pause is slightly shorter, sometimes slightly longer - feels pretty random but when you get a long one it is really annoying.
Has anyone else experienced this (or does your car not do it)? If anyone would be willing to try this out on their DSG and get back to me i'd be really grateful.
thanks
Ant
Couple pics from after the repair: