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Sixth gear - Glenn 42

These do seem to be becoming more common and can now be found on cars as small as a Toyota Yaris( maybe five speeds could go the way of four speeds in a few years time). I know that they do help economy and refinement, but should anyone opt for a six speeder, when is the correct time to select this gear and when to change down to fifth.

Sixth gear - b308

It will vary from car to car, you will need to take into account the engine's power/torque output and find what its most comfortable at... Mine will cruise no problems at 2200rpm, that would be ideal for long trips but with the current 5th gear its only doing about 63/5mph... I'd opt for one if it was a true overdrive as on long trips which we make a few times a year it would be nice to drop the revs to about 2200 at 70mph, currently 2550...

Sixth gear - Steve Pearce

I find when speeding up on a motorway I often miss out 5th completely.

Sixth gear - Glenn 42

Thankyou, as this transmission is becoming more common now I do need to know more about it. I gather all new shape Honda Civics, Toyotas with the stop/ start engine and the bigger turbodiesels all have six speeds now.

Sixth gear - mike hannon
Bigger turbodiesel + 6 gears = pointless.
Any other 6-speed = probably pointless.
Marketing ploy aimed at the bears of little brain, nothing else.
What's wrong with five - or even four - carefully chosen ratios coupled to an engine designed to provide proper torque?
Of course, I don't change gear at all, me - I can't imagine how all that unnecessary effort and co-ordination every few seconds or minutes ever caught on...

Sixth gear - corax

>> Of course, I don't change gear at all, me - I can't imagine how all that unnecessary effort and co-ordination every few seconds or minutes ever caught on...

It's for people who like driving , and most autos are thirstier. I've had a few autos and after a while, I get bored and wish I had a manual. On a tricky road, an auto never changes gear when you want because it can't see whats ahead.

Edited by corax on 09/07/2010 at 18:09

Sixth gear - Pat L

I find the 6th gear in my Passat 2.0TDi quite useful. Very relaxed cruising, exactly 2000rpm at 70mph yet sufficient torque to cope with inclines and minor speed changes. It also makes the slightly higher 5th gear more suitable for country roads etc where you want to maintain a speed of 50-60mph but maintain good economy.

As for autos, I'll get one when I need one due to age/infirmity, but until then I'll stick to the control of manual box.

I see the point about having fewer gears but you can always block change if you want to, and it still leaves you with a range of useful ratios for when conditions dictate.

Sixth gear - Manatee

>>Marketing ploy aimed at the bears of little brain, nothing else.

I've always said I am a bear of very little brain. I did think, when I acquired the CRV in 2005, that 6 gears was OTT. However I've revised my opinion. You don't, as has been said, have to use them sequentially. Third in the CRV will do just about anything after you've set off, but clearly longer gears aid economy.

Towing, I stick with 5th - 6th is just a bit too long - but from 50mph, in normal use it's perfectly OK.

5 would be fine I suppose, but I don't change gear any more with 6 - I just have more choice.

Not good for people who can't make their minds up though.

Edited by Manatee on 09/07/2010 at 20:24

Sixth gear - sandy56

I use 6th gear a lot even when trundling along at about 25mph, with 900 revs. Works a treat

Sixth gear - Leif
Bigger turbodiesel + 6 gears = pointless. Any other 6-speed = probably pointless. Marketing ploy aimed at the bears of little brain, nothing else. What's wrong with five - or even four - carefully chosen ratios coupled to an engine designed to provide proper torque? Of course, I don't change gear at all, me - I can't imagine how all that unnecessary effort and co-ordination every few seconds or minutes ever caught on...

Perhaps, but a manual gear box allows you to select a lower gear than usual, when you might want a sudden surge of grunt available. And my guess is that the auto box does not select the highest gear possible, so economy is reduced. And of course how do you perform an Italian tuning with an auto-gear box? Americans always seem to have autos for some reason.
Sixth gear - Avant

Sixth is very useful if you do a lot of motorway driving, as you are cruising at lower revs.

Very roughly, in the diesels I've had with a 6-speed gearbox, 1st is the right gear for 10 mph, 20 for 2nd, 30 for 3rd and so on up to 60 for 6th.

Sixth gear - mike hannon

But it isn't rocket science, is it? A top gear which is either sixth gear or fifth, with the same overall ratio will provide the same performance, economy or whatever. But a six-speed gearbox will require extra effort to get there, in the form of one extra gearchange - work that could, and should, be covered by a well-designed engine/transmission/final drive combination. Of course, all the drivers who think they are such an important part of the process that the car cannot manage without them, or that the driving experience is better when you have to stir a lever about to make progress rather than twiddle your right big toe, will not be interested in this simple physical fact. No doubt after another decade of marketing hype the same sort of people will be arguing that ten gears is actually better than nine. Or maybe (see above) they'll be old and tired enough to have tried a proper automatic transmission for themselves and to realise how misled they were when they were developing their left arm and leg muscles for nothing.

And by the way, I still, in spite of everything officialdom throws at me, like driving.

Edited by mike hannon on 10/07/2010 at 11:40

Sixth gear - Avant

"No doubt after another decade of marketing hype the same sort of people will be arguing that ten gears is actually better than nine."

You could be right there Mike. I can remember as a chid in the 1950s that one of many reasons why my father's Austin was a far better car than equivalent Fords and Vauxhalls (as well as its ability to start in the morning) was that it had a four-speed gearbox. Some Fords and Vauxhalls had three speeds as standard until well into the 1960s.

There must be some point where enough gears is enough - or as you say go automatic. Personally I can't make my mind up: I've had in the last few years two automatics followed by two manuals. My next one might well be something fitted with DSG.

Sixth gear - Andy P

My BMW auto always uses 6th on the motorway - I've not made a note of what effect it has on fuel consumption but at 70-ish it's doing just under 2000rpm and arounf 50mpg.

Sixth gear - Manatee

>>But it isn't rocket science, is it?...A top gear which is either sixth gear or fifth, with the same overall ratio will provide the same performance, economy or whatever.

That's the part I agree with ;-)

>>But a six-speed gearbox will require extra effort to get there

Why? I don't have to use the gears sequentially.

The top gear of 5 or 6 is normally an extra overdrive gear anyway, so you're really talking about the difference between 4 and 5 gears. 5 lower gears allows a lower first gear which might not matter to many, but I which appreciate when towing and starting on a hill - the CRV diesel has been produced with 5 and 6 speeds, first in the 5 speeder allows 46kph, in the 6 only 36kph, and I don't find it too short. 2nd is also about 20% lower.

I'd actually like 2 reverse gears - the one I have is too high to reverse a trailer without slipping the clutch.

Please yourself of course. BTW, many autos are now 6 or even 7 speeds too.

Sixth gear - Timelord

My Dad recalls a workmate in the 50s who had been injured in WW2, he bought a Ford V8 Pilot (three manual gears) and used to stick it in third and left it there, depressing the clutch and brake to stop.

Sixth gear - Glenn 42

Vauxhall automatics until the end of the sixties had two gears and I believe Honda used two gears on Hondamatics well into the seventies. I bet the fuel consumption was heavy for both makes.

However, talking to a friend who has a six speed Honda Civic, he says he mostly uses it above 60 mph on dual carriageways and motorways.and it does make high speed cruising very relaxed.

Sixth gear - LucyBC
Apropos nothing in particular, when Brian Keenan was released after four and a half years as a hostage in Lebanon he said the biggest changes he noticed were that most newer cars had five gears and it was fashionable to drink posh lager out of bottles in pubs.
Sixth gear - Sofa Spud

My current car, a VW Touran 1.9 TDI, has a 6-speed close-ratio box which means more gear changing than on my previous car, a Passat 1.9 TDI, which had 5 speeds.

My first car was an elderly Ford Prefect 100E, which had a 3-speed gearbox. The ratios were roughly equivalent to 1st, 2nd and 4th in a 4-speed box, so with a big step between 2nd and 3rd - so it was a case of getting into top (3rd) gear at between 20 and 25 mph and staying there!

Edited by Sofa Spud on 11/07/2010 at 10:47

Sixth gear - mike hannon
>Vauxhall automatics until the end of the sixties had two gears and I believe Honda used two gears on Hondamatics well into the seventies. I bet the fuel consumption was heavy for both makes.<

I don't know about Vauxhalls - I haven't owned one for 25 years, thank the Lord. But I do know about Hondamatics, my first 'auto' gearbox was a two speed and overdrive Hondamatic in a new 1982 Accord. In effect, you just put the car in 'star' drive and it went from 0 to well over 100mph without needing to change ratio at all. The first class torque converter did all the work. There was a low hold for hill descent and overdrive for cruising, both available at a light nudge of the lever. It was one of the best and smoothest transmissions I've ever had and makes my point above - proper engine/torque/transmission design is far more important than how many separate ratios there are in the box. Oh, and it never did less than 40mpg with spirited driving.
I don't think any mention of a Ford 100E is relevant to this discussion - they were the usual appalling offering by Ford in that era with technology decades out of date. Vacuum windscreen wipers and a gearbox that was effectively a four speed with one ratio removed for cost reasons, linked to a side valve engine. I ask you! I think on the base model Anglia even the second windscreen wiper was an extra.
If Honda reintroduced the Hondamatic I would buy one tomorrow and enjoy the relaxed driving experience. But the rest of the world, in ignorance, would throw up their hands in horror and go on stirring around their five, six and seven gears.
Sixth gear - Sofa Spud

And, of course, the popularity of 6-speed gearboxes has made the title of the TV programme '5th Gear' a bit lame, although 'Top Gear' is still top gear, however many gears there are. But 5th Gear is still the better of the two programmes in my opinion!

As for driving with a 6-speed box - I tend to use all the gears in sequence on the Touran. it's simple and you'll get used to it very quickly. I find there's no point in using 6th gear on this particular car unless you're on the open road and cruising above about 55 mph.

Edited by Sofa Spud on 12/07/2010 at 19:02

Sixth gear - Sofa Spud

QUOTE:...."" don't think any mention of a Ford 100E is relevant to this discussion. ""

Ah, but then nor is mention of the Hondamatic 2-speed, then, is it? It's a discussion about 6-speed gearboxes. !!!!!

But Leyland went one better than Honda in the 1930's with a 'gearless' version of their Titan double-deck chassis of the day. It just had an early type of torque converter and no gears.

Edited by Sofa Spud on 12/07/2010 at 19:11

Sixth gear - Lygonos

Methinks 90bhp and an H-matic tranny won't do too well in todays 1600kg saloon cars.

Sixth gear - Bilboman

The number and ratios of gears have less and less importance the more torque an engine has: thinking of the very first Corvette Stingray with its 2 speed automatic; the Australian Mk II Cortina with a 4.1 litre engine and manual three speed box and many more.

Thinking back to the heyday of 4 on the floor plus 2 overdrive ratios, 6 speed gearboxes are actually not so new. Having driven a hired BMW 116d recently and cursing the position of reverse and the stiff gate, I thought at the time that a neat little switch in the gearknob would actually make life easier!

As a slight aside, my grandfather carried out a publicity stunt in the 1930s, driving a Chevrolet with its gearbox sealed in top around the coast of Borneo, to demonstrate the power and torque of the engine.

Sixth gear - Lygonos

The more torque an engine has, the higher a final ratio it can pull.

Lower gears are to improve driveability - on turbos it facilitates avoiding being 'off-boost', on non-turbos it aids staying in the 'power band' (peak torque).

You can ride a fixed gear bicycle almost anywhere, a 3-speed is better, and a 21-speed give you more options still especially if offroad, pulling uphills, high speed cruising.

It's pretty much the same for cars - just because you have X-gears doesn't mean you need to go through them all, or one-by-one.

Sixth gear - mike hannon
>a neat little switch in the gearknob would actually make life easier!<

At the risk of subject drift again, early Citroen DSs had a clutch that operated as soon as you touched the gear lever.
A similar system, the 'Manumatic' was used on some British cars, notably BMC products, in the late 1950s.
Neither system was entirely trouble-free...
Sixth gear - movilogo
And my guess is that the auto box does not select the highest gear possible, so economy is reduced.


Actually autos select higher gears quicker than manual. Most autos have higher gear ratios than manuals - especially for 4th & 5th gears.

6th gears are probably fine for petrol cars but I also see them as pointless for diesels. As diesels have so much torque it hardly needs another extra gear to multiply it!
Sixth gear - Avant

Sixth is still useful on the motorway even for a diesel, to keep the revs (and noise) down.

But I suppose most diesels have enough torque to manage with five provided that fifth is as high as the average sixth is currently.

Sixth gear - Pat L

Sixth is still useful on the motorway even for a diesel, to keep the revs (and noise) down.

But I suppose most diesels have enough torque to manage with five provided that fifth is as high as the average sixth is currently.

Exactly!

This discussion seems to be going nowhere, perhaps because there is no real problem with 6 speed gearboxes.

Sixth gear - Lygonos

It's going nowhere because 6-speed boxes are better than 5 on any engine as long as they are user friendly.

For best acceleration you want as low gearing as possible while still in a healthy torque output, and for best cruising you want as long as possible without the engine labouring.

More gears makes this easier more of the time.

For example: http://www.prodrive.com/up/06MY%20Forester%20PPP.pdf

On my car it accelerates better at every speed interval in the lower gear so more gears = better potential acceleration.

It has torque up to the eyeballs, but I wish it had a 6th and even 7th gear for cruising/economy. 50-70 in top is faster than a Porsche 911 GT3 - methinks it could use a longer ratio.

Sixth gear - mike hannon
>Methinks 90bhp and an H-matic tranny won't do too well in todays 1600kg saloon cars.<

That's why I don't drive one or have any wish to.
You're right - this discussion is going nowhere.
Sixth gear - Harry Boy

Used to have a Scimitar Coupe (not the GTE) which had overdrive on 3rd and 4th. It was operated via a solenoid using a swith on the dashboard. Worked a treat with smooth changes, I could drop a "gear" seemlessly and power up a hill or away from traffic very easily.

Probably a good reason why we don't see overdrives these days, but seems a shame, probably went the same way as the pre-selector gearbox and chain drive.