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DSG slow downshift

16747 Views 35 Replies 13 Participants Last post by  thermorex
I have had my new MkV GTI DSG for 3 weeks now and am generally happy with it except for one thing. Most times when I manually downshift from one gear to the next the shift takes about 1 sec which is much longer than the very fast upshifts. It's as if the gearbox is optimised for upshifts by preselecting the next highest gear and, when I tell it to downshift, it has to go to the shop, buy the required gear and fit it before changing down (OK, it's not that bad but 1 sec feels long when you are freewheeling into a corner and are waiting for the downshift to occur). This is most noticeable when downshifting from 4th to 3rd since I mostly drive around town in 4th. I have recorded the engine sound on my PPC and analysed the file with audio editing software and can confirm the 1 sec delay before the downshift is complete. Anybody else noticed this problem? Barry
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dog4aday said:
I have 2 gripes about the DSG:
1. Down-shifting while braking hard causes the car to lurch because the RPM matching doesn't seem to take into account the fact that you're breaking. This makes the car seem unstable, especially if it happens while turning.
2. While accelerating from a stop in D-mode the car seems to think that I want to gun it if I depress the throttle just a little bit more than enough to get it going. The only way to get a smooth shift is to delicately press the throttle but the takeoff is painfully slow. Seems like the throttle response isn't optimized for around the town driving.
#1 I will agree with. I experience this when I drive out of my normal style. Generally only does it if I'm driving like a maniac in S mode.

#2 I don't have that problem, maybe it is a result of the turbo spooling up at a certain point in the RPM range and the way you are using the throttle.
jgo said:
dog4aday said:
I have 2 gripes about the DSG:
1. Down-shifting while braking hard causes the car to lurch because the RPM matching doesn't seem to take into account the fact that you're breaking. This makes the car seem unstable, especially if it happens while turning.
2. While accelerating from a stop in D-mode the car seems to think that I want to gun it if I depress the throttle just a little bit more than enough to get it going. The only way to get a smooth shift is to delicately press the throttle but the takeoff is painfully slow. Seems like the throttle response isn't optimized for around the town driving.
The throttle response is adaptive. Try standardizing your driving habits. I have zero problems with mine.
That's what I heard and I suppose part of the problem is that I'm not the only person who drives the car. :-\
dog4aday said:
That's what I heard and I suppose part of the problem is that I'm not the only person who drives the car. :-\
Could be.

If you have access to a VagCom cable you can reset the DSG adaption and have it redo the shift points. (or so i read over at the vortex)
Makes me really happy that i opted for the 6 speed manual trans. No problems.... ;D
I haven't had any problems whatsoever. Makes me happy I got the DSG. Haha.

dog4aday said:
I'm not the only person who drives the car. :-\
That really sucks. I wouldn't let anyone drive my car except for my dad, because he taught me to drive and I feel like I'd owe to him if he randomly asked to drive my car.
bbgmc said:
Makes me really happy that i opted for the 6 speed manual trans. No problems.... ;D
Well the DSG is my compromise to sitting in bumper-to-bumper traffic during my daily 2 hr commute. Ideally I should have 2 GTI's (a manual and a DSG.) :D
I have been in contact with VW Australia about slow downshifts. They say this it normal that it can take about 1 sec for the downshift but I still think there is a bug in their software. To my mind this is how a downshift should occur if the gearbox has preselected the wrong gear:
press down paddle > wait for gearbox to select next lowest gear (approx 1 sec) > first clutch releases > engine revs matching > second clutch engages.
This process ensures that the driver has control of the engine revs up to the point that the gearbox is ready to change gears and we know that this changeover is very quick.
What actually happens with my car is this:
press down paddle > first clutch releases > engine revs matching > wait for gearbox to select next lowest gear (approx 1 sec) > second clutch engages.
Here, the driver loses control of the engine revs for approx 1 sec between when the first clutch releases and the second clutch engages so the car is freewheeling for this period of time. I find this very disconcerting. I'm hanging out for enough people to complain so that VW brings out new software to fix this. Does VW read any of these posts????? Barry
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when im on the throttle i dont seem to have the same problem you do barry. try downshifting while youre accelerating, then downshifts are really fast.
Yes, downshifts are fast if you are on the throttle before you request the shift and this technique works well if you are not in traffic. However, I spend most of my time in city traffic and most of my downshifts are done with the car in neutral or trailing throttle so most of my downshifts are slow. Barry
slimpickaus said:
Yes, downshifts are fast if you are on the throttle before you request the shift and this technique works well if you are not in traffic. However, I spend most of my time in city traffic and most of my downshifts are done with the car in neutral or trailing throttle so most of my downshifts are slow. Barry
Why would you be in neutral on a DSG in the city?
Neutral throttle, not gearbox in neutral. By neutral throttle, I mean just enough throttle to maintain constant speed. Trailing throttle means no throttle and engine braking. Barry
This is my take on DSG downshifting.

Because the DSG shift up so much faster than a manual, you get used to the speed of the upshift, then when its time to go down and you pop two gears pretty fast ( two little clicks of the paddle ) the revs need to match up to the gear ( exactly the same as a manual ) think of the time it takes to downshift a manual, push in the clutch, shift from 5th to 4th, let the clutch out and THEN you feel the engine braking... with DSG, you go from 5th to 4th instantly with a single paddle click, but because you are downshifting ( matching revs ) you have to let the engine match the gear first.

Its a perfect system... you get all the benefits of faster upshifts with DSG and you match the engine braking speeds of a manual! It was a learning curve, but already with only 700 miles on my DSG, i feel confident im getting the hang of it and it is no longer disconcerting for me, you have to allow yourself that learning curve. Im kind of bummed for the guy who traded in his 07 for a manual!
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I'm also a big supporter of the DSG. I love manual tranny's, but nothing compares to a DSG yet. Plus, the lack of parasitic loss caused by most auto tranny's is nonexistent in a DSG. God Bless this transmission, it's the best out there.
After a lot of time with my DSG, here's my thought on the programming: If I downshift and then hit the gas, it should go ahead and accelerate the matching faster. It seems pretty commited to downshifting slowly if you let off the gas just prior to the shift. On the road, a whole second is a long time to not be able to change your mind...

I found myself thinking the other day, if VW went out of business, would I be able to keep my car running with the DSG for the next 40 years? I hope they keep at it, because this is a great transmission!
Yep, same "problem" here. I've learned that the DSG is a different beast than manual. It's not that it's not ready for the shift, but that dang, or good, RPM matching. It's good for the clutch, in that it will pull off, accelerate to match spped and then re-engage with little slip, but that takes about a second on a downshift if you're not giving it gas. The main mental change that will speed up down shifting:

Wait until you're ready to accelerate. If you're in 4, and know you're going to shift to 3, wait until you're starting to gas it, in 4, _then_ hit it down to 3. MUCH faster. It accelerates the RPM match way faster because you're telling it to go fast with the gas.

Give that a shot, and let us know if you feel a difference.
That's it, the best sollution to the dsg issue! It is a little of pain in the a$$ to get used to but this is the only work around I have noticed. So, in manual mode, you may be at an intersection in 6th, want to shift in 3rd to take a left for example (like maybe any driver would do with a manual gearbox) and floor it. The result is delay of at least two seconds in my case. If you leave the 6th selected, brake (while taking a look to notice some potential gears shifting)and while accelerating you shift down is much, much faster even if it is a little out of the "normal habbits".
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