This question may cause some debate.....

sars said:
Z4M-2006 said:
Auto appears no where in the description..

It's a dual clutch transmission..

An automatic gearbox has a torque convertor and, brake bands and drums.. Not cogs and Synchros and clutch..

Just want to give the op the correct info and not information gleaned on ignorance ..
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You are, I believe mistaken, a torque converter gearbox also contains gears to define ratios (exclude CVT), the torque converter replaces the clutch. And this is the difference between a dual clutch transmission and a slush box. The DCT is not a manual transmission either, as the driver does not physically engage any gear, it is an automated process.
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No worries..

I rebuild gearboxes as part of my job.. Have been a Borg Warner and ZF specialist for 20 years...

If you want to be pedantic, even with a manual shift gearbox you don't directly engage a gear wen you move the gear-lever.
That's done via a remote linkage.. But lets not split hairs..
 
I test drove both dct and manual and decided ultimately the roadster experience for me had to be mated with a manual. i even went for a lower powered engine as it came up AUC at an astonishing price. loved the pops and burbles of the 35is dct but the straight 6 drives and sounds so smooth and lovely. I have no regrets at all. i love the manual box in the car. and yes i agree with some of the comments above. its about biting point, acceleration and being able to control the gear at all times of driving. i think the m4 being available in manual shows bmw are also listening to the manual enthusiasts. of course in city driving a manual can be harder work but i never think to myself i wish i had an auto. i hope that helps. all personal choice of course ...
 
Er I'm not being pedantic, a manual gearbox may have linkages, levers or cables between the gear lever and box, but they are mechanical connections and thus by definition connected and perform mechanical work. Conversely, any fly by wire connection inherently implies automation.

Z4M-2006 said:
Just want to give the op the correct info and not information gleaned on ignorance ..
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I wouldn't have bothered to correct you, but for the above

Z4M-2006 said:
The DCT is a manual gearbox...
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and that is just blatantly incorrect
 
I will get you some pictures later... Easier to understand..;)

The internal workings of a "manual" gearbox and a DCT are more or less identical...Its the shifting mech that differs.. Whereas the internal workings of an automatic gearbox have no resembalence whatsover to a manual or DCT.
 
Its a tricky one as DCT owners will say its a manual gearbox(for me it isn't and you need a third pedal for it to be a manual) and defend it to the hilt, then you have me who is a dinosaur who loves a three pedal manual and I just don't like auto`s/twin clutches one bit(owned both).

I can see that if the car is used daily an auto/DCT makes sense but if its a weekend car I would rather walk than drive a car for fun that has an auto/twin clutch gearbox.
 
Z4M-2006 said:
The internal workings of a "manual" gearbox and a DCT are more or less identical...Its the shifting mech that differs
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That it is indeed so, but that process of changing gear is automated that is the difference, which is kinda fundamental to the argument. If you can't grasp the simplicity then.....
 
Sgreen said:
The debate is Manual or DCT?
Sharon
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I have a 35is and the DCT is simply FANTASTIC. Its lightening quick and just works exactly how I want it to in sport or sport plus. Its fab on the motorway etc, but when you want some fun you just use the flappy paddles. Best of both worlds.

I couldn't comment about the weather tbh. My z4 slides a bit in the rain or cold if you get busy with the accelerator, but I don't think thats an effect of the DCT.
 
I would have got a 35is if they had the manual option,didn't like or want the DCT after a test drive :(
Very happy with the manual 35i :thumbsup:
 
sars said:
Z4M-2006 said:
The internal workings of a "manual" gearbox and a DCT are more or less identical...Its the shifting mech that differs
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That it is indeed so, but that process of changing gear is automated that is the difference, which is kinda fundamental to the argument. If you can't grasp the simplicity then.....
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Irony at its best..
 
metal licker said:
I would have got a 35is if they had the manual option,didn't like or want the DCT after a test drive :(
Very happy with the manual 35i :thumbsup:
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I love the 35is big time but like with a Nissan GTR/C63 AMG all cars I would love to own but the gearbox makes them a no go for me, the DCT is an amazing gearbox technically I think but they just don't float my boat, like you if I went for an E89 it would be the 35i with a manual gearbox. :thumbsup:
 
ronk said:
simonlpearce said:
M division decided not to fit the SMG to the Z4 M's, wonder why 8)
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Didn't they fit it to an M3?
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Indeed they did, but then that car was marketed to the masses, including the yanks who fail at 'stick shift'. I think the Z4 was seen as something a little more special :thumbsup:

Not to mention the copious amounts of failed SMG units you see over on cutters :driving:
 
jamie_z4 said:
ronk said:
simonlpearce said:
M division decided not to fit the SMG to the Z4 M's, wonder why 8)
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Didn't they fit it to an M3?
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were talking about a Z4 though, not an M3!

they also fitted the DCT in the M5 , but thats another car also.
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I realise we were talking of the z4 but wondered why, if they deemed the smg suitable for the m3 it wasn't suitable for the z4 ?
 
sars said:
Z4M-2006 said:
The internal workings of a "manual" gearbox and a DCT are more or less identical...Its the shifting mech that differs
Click to expand...

That it is indeed so, but that process of changing gear is automated that is the difference, which is kinda fundamental to the argument. If you can't grasp the simplicity then.....
Click to expand...

The definition itself states "auto" so pretty clear to me:

Dictionary said:
A dual-clutch transmission, (DCT) (sometimes referred to as a twin-clutch transmission or double-clutch transmission), is a type of automatic transmission or automated automotive transmission
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So what would you call the gearbox when you move the gear-lever to the left an inch and the hydro pack will not shift the synchros unless you tell it too?


A manual automatic? :rofl:

A manual gearbox that has a hydro shift pack is still a manual gearbox...
 
Here's a question for the manual gearbox users:-

In sixth gear, at what speed would drop a gear to achieve max acceleration?
(Looking at Autobahn speeds here)

Ie doing 100mph would you drop a gear or two or not?
 
john-e89 said:
Never mind all this nonsense the main question is, are you people not supposed to be at work today..??? :poke:
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Work????
Don't use that sort of four letter language ! :rofl:
 
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