Dumping the DSG?

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Originally Posted by Sunny43.5

Never been a fan of VW's supposed class leading auto technology , those dummies in VW stumbled not only with the DSG but the Tiptronic wasn't much better . If they had asked more locals familiar with our climate and not their own team of testers who spent just a few weeks in the desert in Nevada , they would have realised the folly of their sealed for life stance and an internal filter sealed inside with a memo to dealers that they should not open the sump to replace the filter which will block with debris and also the fluid which gets burnt black through lack of a service schedule . Give me good old fashioned autos with simple mechanics anyday over this fragile s&*$t .

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The Tiptronic is a conventional auto, and just like pretty much every other conventional auto, it has the filter in the sump. It's only called a Tiptronic, because of the shifter hanging off the centre dash panel.

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Originally Posted by Umai Naa!!

And besides, you can't put a torque converter on a manual transmission ;)

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Who said you could? The DSG is in fact a pre-selector style of box, not a conventional two shaft manual.

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Originally Posted by Ozsko

Who said you could? The DSG is in fact a pre-selector style of box, not a conventional two shaft manual.

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By design, it's essentially a manual gearbox. It just has a box of smarts that operates the clutches and shifting for you.

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Originally Posted by Umai Naa!!

By design, it's essentially a manual gearbox. It just has a box of smarts that operates the clutches and shifting for you.

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It is nothing like a conventional manual box, where do people get these ideas?

Probably the people who've pulled them apart and seen inside them.

The argument for the 7speed dry clutch was for energy efficiency re transmission power loss compared to 6speed oil clutch .
With 7Speed Golf clutch, had several occasions where DSG suddenly disengaged (due to over temperature? while slowly into position uphill)
However re the 6 speed DSG fitted to my Passat, this is so much better than older cars I have driven with conventional torque converters. Unless one watches the Tacho' one is not aware if any change has taken place. BUT and I mean BUT, re BlueMotion, this is a Bugger. Many times I pull up at a roundabout then I see my opportunity. What happens? The car stalls at the most critical moment!

The DSG is nothing like a preselector gearbox - a la Armstrong Siddeley, Daimler and some modern buses.

The preselector box has a series of epicyclic (planetary) gear trains just like a conventional auto box. A specific gear is selected electrically in advance (preselected) and engaged mechanically when needed by pressing a "clutch" pedal. The "clutch" pedal applies a brake band to the preselected planetary gear with a big spring. Preselector boxes often have a fluid flywheel (like a modern torque converter) or a centrifically engaged mechanical clutch. In modern applications, the mechanical engagement can be power actuated.

A DSG is two parallel conventional gear sets, with two co-axial clutches - operated, as Umai Naa says, by electrickery and hydraullickery.

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Originally Posted by Ozsko

Who said you could? The DSG is in fact a pre-selector style of box, not a conventional two shaft manual.

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It certainly is a conventional style box
It's just that the two shafts are not parallel, one is inside the other
Our hand and foot have been replaced by electrickery and hydraullickery

Don't get me wrong - the electrics managing the box are very smart
VW had to create a faster diverter valve to handle the fast gear changes

The clutches are interesting to see (for ages I could not work out how that part worked)

I still want to know how the rotating mass of crank, rods and pistons can be moved 500rpm in 6 milliseconds (a fifth of a blink of the eye) unless the tacho is fibbing of course.
Multiples of clutches have nothing to do with the basic physics of controlling the rotational mass.

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Originally Posted by Ryeman

I still want to know how the rotating mass of crank, rods and pistons can be moved 500rpm in 6 milliseconds (a fifth of a blink of the eye) unless the tacho is fibbing of course.
Multiples of clutches have nothing to do with the basic physics of controlling the rotational mass.

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The rotating mass changes speed in whatever time it takes — as does the flipping of an electronic switch.
Whilst not necessarily the same, both are virtually imperceptible in terms of human comprehension, and moving the tacho needle itsalf also takes time.