VAG DSG

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Sat 31 Dec 2005 19:39
VAG DSG - machika
Does anyone know why the DSG is not mated to any petrol variants of VAG cars? It would surely improve the fuel consumption, compared with normal torque converter auto gearboxes.

Edited by Avant on 22/02/2012 at 22:01

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Sun 1 Jan 2006 15:35
VAG DSG Gearbox - Avant
"To add to the info, the gearbox works better in my opinion on Petrols than Diesels."

This is always a potential problem with diesel automatics as well, as with a manual you give it a few revs when starting from rest. My 2.5 TDI is almost powerful enough to overcome this but the slight pause is just still there.

As HJ says it can vary from engine to engine - there are some petrol engines which have very little oomph low down. I'd imagine that an Alfa or Fiat would be best as a manual. If I can't afford another Audi next time I would certainly look at the Golf 2.0 TDI with DSG: if anyone else has experience of this combination that would be interesting.

It's also worth bearing in mind the mileage of the car you're trying: VAG diesels take a good 10,000 miles to loosen up fully and give of their best.
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Wed 4 Jan 2006 12:50
VAG DSG Gearbox - Dr Rubber
There is a software fix for the DSG if lag is excessive. I understand this does not always work, and not all dealers know about it.
Apart from the (occational) lag, I have heard this box is well worth the money if you are after an autobox
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Wed 4 Jan 2006 13:12
VAG DSG Gearbox - cheddar
>>It's a twin shaft transmission with 1, 3 and 5 on one shaft and 2, 4 and 6 on another. Each shaft is separately clutched. Simplistically put, that makes it possible for a sort of pre-selection whereby the next gear up or down on the other shaft can be ready.>>

How does it cope if you are barrelling along in, say, 3rd with 4th preselected however just before it is about to change to 4th you slam on the brakes to make a turn that requires 2nd, I assume there must be some delay in gear selection to the extent that even if it has selected 2nd by the time you have made the turn there will have been zero engine braking available.

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Wed 4 Jan 2006 13:40
VAG DSG Gearbox - daveyjp
Unfortunately it can't legislate for bad driving which is what your example appears to be a result of.

If it's in fourth and you slam on the car selects a gear suitable for the speed you are going once gas is reapplied and how much gas is applied - in this case it could be third or second. BTW it can be in fourth by 25 mph.

Gear delay is 0.02 of a second - substantially less time than it takes to perform a manual change so any lack of engine braking is negligible.
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Wed 4 Jan 2006 15:37
VAG DSG Gearbox - cheddar
Not bad driving, simply an example of a situation where the gearbox would not know what gear would be required next, nevertheless you have answered the question. Just one point, is the 0.02 sec the time it takes to change to a preselected gear or the time to select a new gear.
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Wed 4 Jan 2006 19:36
VAG DSG Gearbox - daveyjp
In the interest of advancing my knowledge of this gearbox and to see what did happen with Cheddar's scenario I did it on the way home (on a deserted road BTW!). Accelerated to the point where it was on the cusp of 3rd and 4th and slammed on. As soon as the speed dropped the display moved back to 3 then down to 2 - I then applied power and with no lag accelerated away. I also slammed on from 50 as I approached a set of lights and the display simply went down the numbers as speed dropped off, it then choose the correct gear for when I pulled off.

In the 0.02 of a second it does both - changes gear and pre selects the next one.
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Thu 5 Jan 2006 22:07
VAG DSG Gearbox - hillman
There is an article in the January 2006 BBC Focus magazine about the Bugatti supercar, W16 engine, 1001hp, 1-100kph in 2.5 sec, 253 mph, with a DSG gearbox. Discuss
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Thu 5 Jan 2006 22:12
VAG DSG Gearbox - Imagos
That must be the Veyron. I'd have thought 1000hp would blow it to bits.
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Fri 6 Jan 2006 08:52
VAG DSG Gearbox - daveyjp
There's enough eletrconic wizardry to prevent you being too enthusiastic! Throttle is e-controlled so flooring it makes no differnce to the performance - it will give enough to get the car going but prevent serious damage.

Saw a friend last night who is swapping a Fiat Multipla (when they start dying in the outside lane of the M60, leave you stranded on the central reservation then the dealer charges you £60 to say there is nothing wrong it's time to get rid!) for an Altea 2.0 TDi DSG - he's not picked it up yet, but he was still grinning from the test drive and that was last Friday!
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Wed 22 Feb 2012 15:48
VAG DSG Gearbox - dieseldogg

Despite wor DSG being in for major & e-x-t-e-n-d-e-d surgery (under warrenty thankfully)

I really like what it does, there is sometimes a fractional pause when pulling away, and the blinking nuisence of having to put der right foot on the brake when trying to get the throttle when moving off from neutral....gerrr.

But "her be a hoot" once moving.

Seems to work really well with the wee 1.6 TDI

50mpg (brimmed figs) overall from mixed driving in an automatic aint bad

It drops instantly from 7th to 4th and fills the clock if tramped at about 45 or 50mph

Excellent for overtaking.

Most of the time sits at about 1500rpm if driving at sensible speeds.

"atta girl"

And Erm.................................................

its available with the 1.2TSI (=petrol) as far as I am aware

Edited by dieseldogg on 22/02/2012 at 15:49

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Wed 22 Feb 2012 16:04
VAG DSG Gearbox - John F

Another disadvantage which might already have cost you 2006 posters dearly is that it has to be serviced! Special fluid and filter replacement not cheap. That makes me very happy with my sealed for life unburstable 14yr old ZF 5HP19.

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Wed 22 Feb 2012 22:00
VAG DSG Gearbox - Avant

I wasn't a moderator in 2005/6 but if I had been I'd have tried to discourage people calling it, effectively, the Direct Shift Gearbox Gearbox. At least I can alter the thread heading.

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Thu 23 Feb 2012 10:05
VAG DSG Gearbox - dieseldogg

Cor

Not like OHP pins?

Or even Ben Nevis

Wot had an old PSI spluttering when i were a lad in the RE (TA)

The Ordance Holdfast Pins pins that is

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