Could this be the begining of the DSG Issue on my Octy????

[BottomScratcher]

in manual mode, mine doesn't do that.
it will hold whatever gear i have chosen, provided it's not going to stall, or being red-lined.

if u use the paddle-shifters in d-mode, than yes, it will default back after approx 6-10 secs if no further gear changes r made.

Another case of, "I didn't know it did that!" Believe it or not I've read the manual. Not cover to cover, but I've had more than a cursory glance at it. I was looking at it a few eeks ago, and discovered that the seat belts are adjustable for height on the pillars. "I didn't know it did that!"

I can put my hand on my heart and say in over 2 years of owning the car I've never driven it in manual mode. So, next time I'm going down from Braidwood to Bateman's Bay on the Kings Highway around all those s-bends I'll be thinking kindly of you dArK5HaDOw.

[dArK5HaD0w]

Another case of, "I didn't know it did that!" Believe it or not I've read the manual. Not cover to cover, but I've had more than a cursory glance at it. I was looking at it a few eeks ago, and discovered that the seat belts are adjustable for height on the pillars. "I didn't know it did that!"

I can put my hand on my heart and say in over 2 years of owning the car I've never driven it in manual mode. So, next time I'm going down from Braidwood to Bateman's Bay on the Kings Highway around all those s-bends I'll be thinking kindly of you dArK5HaDOw.

U learn new things everyday

That's a fantastic drive between braidwood & bateman's. I wanna do that run again. Has the kings highway been reopened since that rock fall?

[Martin]

if u use the paddle-shifters in d-mode, than yes, it will default back after approx 6-10 secs if no further gear changes r made.

Using the paddles in D/S mode is only a short term influential action

You can also force it back into full auto mode (when in D/S mode) by holding the right paddle for 2 seconds

When driving very hard and encountering on/off throttle conditions the DSG can be a real pain changing up/down too often and leaving you without power connected to the road just when you need it - this is when I use manual mode

I also use manual mode in stop/start crawling rush hour traffic, it prevents the gearbox from jumping into 2nd gear and slipping the clutch a lot - instead it stays in 1st and the clutch is fully engaged

[zei20t]

I also use manual mode in stop/start crawling rush hour traffic, it prevents the gearbox from jumping into 2nd gear and slipping the clutch a lot - instead it stays in 1st and the clutch is fully engaged

I do the same thing. it rides the clutch in 2nd gear WAY too much for my liking in 'D' mode.

anyway, no matter what mode you have it it, if its taking up the clutches too quickly, youll get the thump, and its not normal.

[Martin]

anyway, no matter what mode you have it it, if its taking up the clutches too quickly, youll get the thump, and its not normal.

Fully agree

[Martin]

The DSG is essentially two manual gearboxes in the same housing electronically controlled by two clutches. The DSG shifts occur a few milliseconds. A lot faster than anything you're doing or not doing.

That's not strictly correct

Only the "pre-empted" gear changes are quick ~0.1 seconds
This is where the computer has pre-seleced the next gear and only has to open one clutch and close the other
Technically speaking, that is not a gear change as we think of it, not a selector moving the engagement mechanisms

Any need to change gear that is not pre-empted by the computer can take up to 1.1 seconds
The worse case scenario is when a gear change is required on the same shaft/clutch,
4th to 2nd for example, the clutch opens, the gear selector is moved, the same clutch is closed
And this shows the DSG is not magically fast at changing gears
The only reason the DSG can change achieve fast gear changes is because it has two clutches to alternate between

[RS125TDI]

Thank you all for the inputs, I have a lot to learn about cars, have to go through a crash course!
I haven't experienced it again since yesterday morning, and have done about 130 kms since and didnt miss a beat. Will keep you all posted on how I go in the next few days and also the visit to the dealer. Will also check my service book to see if the DSG service was indeed done at the 60k service, as I only purchased after this scheduled service was completed.

[BottomScratcher]

That's not strictly correct

Only the "pre-empted" gear changes are quick ~0.1 seconds
This is where the computer has pre-seleced the next gear and only has to open one clutch and close the other
Technically speaking, that is not a gear change as we think of it, not a selector moving the engagement mechanisms

Any need to change gear that is not pre-empted by the computer can take up to 1.1 seconds
The worse case scenario is when a gear change is required on the same shaft/clutch,
4th to 2nd for example, the clutch opens, the gear selector is moved, the same clutch is closed
And this shows the DSG is not magically fast at changing gears
The only reason the DSG can change achieve fast gear changes is because it has two clutches to alternate between

Shortwinded reply: By pre-empted I know you mean preselected. That being the case I still stand by what I said as going from 1st to 2nd, where the OP's problem is occurring, is a preselected shift, which VW says takes 8ms to complete.

Longwinded reply: Whilst the motor vehicle is stationary and in N, the driver can select D for "drive" (after first pressing the foot brake pedal). The transmission's reverse gear is selected on the first shaft K1, and the outer clutch K2 engages at the start of the 'bite point'. At the same time, on the alternate gear shaft, the reverse gear clutch K1 is also selected (pre-selected), as the gearbox doesn't know whether the driver wants to go forward or reverse. The clutch pack for second gear (K2) gets ready to engage. When the driver releases the brake pedal, the K2 clutch pack increases the clamping force, allowing the second gear to take up the drive through an increase of the 'bite point', and thereby transferring the torque from the engine through the transmission to the drive shafts and road wheels, causing the vehicle to move forward. Depressing the accelerator pedal engages the clutch and causes an increase of forward vehicle speed. Pressing the throttle pedal to the floor (hard acceleration) will cause the gearbox to "kick down" to first gear to provide the acceleration associated with first, although there will be a slight hesitation while the gearbox deselects second gear and selects first gear. As the vehicle accelerates, the transmission's computer determines when the second gear (which is connected to the second clutch) should be fully used. Depending on the vehicle speed and amount of engine power being requested by the driver (determined by the position of the throttle pedal), the DSG then up-shifts. During this sequence, the DSG disengages the first outer clutch whilst simultaneously engaging the second inner clutch (all power from the engine is now going through the second shaft), thus completing the shift sequence. This sequence happens in 8 milliseconds (aided by pre-selection), and can happen even with full throttle opening, and as a result, there is virtually no power loss. Once the vehicle has completed the shift to second gear, the first gear is immediately de-selected, and third gear (being on the same shaft as 1st and 5th) is pre-selected, and is pending.

Comparative manufacturers shift times:
Volkswagen DSG (Golf GTI) 8 ms
BMW SMG II (M3 E46) 80 ms
Ferrari F1 (Maserati 4200GT) 80 ms
Ferrari F1 (360 F1) 150 ms
Ferrari F1 (Enzo) 150 ms
Ferrari F1 (575M) 220 ms
BMW SMG (M3 E36) 220 ms
Aston Martin Vanquish 250 ms
BMW SSG (3-series) 250ms (150ms for 1st to 2nd)
Alfa Selespeed (156 Selespeed) 700 ms

[BottomScratcher]

U learn new things everyday

That's a fantastic drive between braidwood & bateman's. I wanna do that run again. Has the kings highway been reopened since that rock fall?

I often go down to Narooma. Gave the coast road away years ago. Nightmare! Down to the second Goulburn turn off, left to Tarago, and out on the Kings south of Bungendore for a cruisey run to Bateman's Bay. Rock falls and prangs are common so I check the Snarl app before heading past the Moss Vale turn off. The alternate route being via Kangaroo Valley, but that means coast road from north of Nowra.

[BottomScratcher]

Using the paddles in D/S mode is only a short term influential action

You can also force it back into full auto mode (when in D/S mode) by holding the right paddle for 2 seconds

When driving very hard and encountering on/off throttle conditions the DSG can be a real pain changing up/down too often and leaving you without power connected to the road just when you need it - this is when I use manual mode

I also use manual mode in stop/start crawling rush hour traffic, it prevents the gearbox from jumping into 2nd gear and slipping the clutch a lot - instead it stays in 1st and the clutch is fully engaged

I knew about the 2 second reset to auto, but had no idea that the gears were held in manual. Makes sense. It's "Manual" afterall.

I said about using S mode in heavy traffic, but it'll be manual from now on.

[Martin]

Comparative manufacturers shift times:
Volkswagen DSG (Golf GTI) 8 ms
BMW SMG II (M3 E46) 80 ms
Ferrari F1 (Maserati 4200GT) 80 ms
Ferrari F1 (360 F1) 150 ms
Ferrari F1 (Enzo) 150 ms
Ferrari F1 (575M) 220 ms
BMW SMG (M3 E36) 220 ms
Aston Martin Vanquish 250 ms
BMW SSG (3-series) 250ms (150ms for 1st to 2nd)
Alfa Selespeed (156 Selespeed) 700 ms

Those are all the best case timings,
but what a dog the Alfa Selespeed is!!!

[The Speedfighter]

Comparative manufacturers shift times:
Volkswagen DSG (Golf GTI) 8 ms
BMW SMG II (M3 E46) 80 ms
Ferrari F1 (Maserati 4200GT) 80 ms
Ferrari F1 (360 F1) 150 ms
Ferrari F1 (Enzo) 150 ms
Ferrari F1 (575M) 220 ms
BMW SMG (M3 E36) 220 ms
Aston Martin Vanquish 250 ms
BMW SSG (3-series) 250ms (150ms for 1st to 2nd)
Alfa Selespeed (156 Selespeed) 700 ms

Where did you get this info, cause this is incorrect. A VW is 10 times faster with shifting then a Ferrari?? which currently holds the record of fasted shifting with 60ms

[dportaz]

Hey all,

Im hoping that this aint that big of an issue, but I get some shuddering when taking off and coming to a stop...

Its a 2010 Octy RS Petrol DSG - coming up to 30,000kms - full service history... I have installed a torque arm insert, so idle is touch rougher which im fine with - however when ever im stationary and if I let the foot off the brake, when the car starts to move (i.e. clutch grabs) it shudders... If I take off with the accelerator quickly there is no shuddering so it only happens when I lift off the brake and take a second or 2 to start accelerating.

When coming to a stop i get a slight shudder in the last couple km/h (i.e. 5kmh down to 0kmh)

That is the only time I experience any kind of issue - when driving gearbox is fine, changes are smooth and fast etc...

Let me know your thoughts..

Daniel

[BottomScratcher]

Where did you get this info, cause this is incorrect. A VW is 10 times faster with shifting then a Ferrari?? which currently holds the record of fasted shifting with 60ms

It wouldn't be the first time that very same comment has been made on a car forum. Mainly by Ferrari enthusiasts. The 8ms spec has been around since the VW DSG was introduced. Here's another reference going back 7 years..

Interestingly, the older 6 speed "wet" DSG (as used across all VAG cars including the Bugatti Veyron) at 8ms upshift is way faster than the newer 7 speed dry clutch DSG, which is claimed to upshift in 0.03 sec. Faster being a relative term when discussing time measured in milliseconds.

[Martin]

I have installed a torque arm insert

It will be caused by that modification

I assume you also get cabin reverberations when reversing - since doing that modification