Sequential shift gear box!!??
Thread Starter
Instructor
Joined: Jul 2004
Posts: 101
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Sequential shift gear box!!??
Im posing this question to people that may have more technical insight than myself. Why haven't any of the hi perforce car manufactures installed a sequential gear box? I know If there were something like that on the market it would catch my eye! They are used in rally cars and motorcycles with great success. They shift faster than the typical H pattern type shifters. I have wondered this for a really long time... Everyone is always taking dual clutch PDK SMG or what ever BMW is using now. Im talking 3 pedals not some computer operated clutch deal... A regular manual transmission only difference being it's a sequential shift instead of H.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,943
Likes: 12,359
From: NE South Carolina
Im posing this question to people that may have more technical insight than myself. Why haven't any of the hi perforce car manufactures installed a sequential gear box? I know If there were something like that on the market it would catch my eye! They are used in rally cars and motorcycles with great success. They shift faster than the typical H pattern type shifters. I have wondered this for a really long time... Everyone is always taking dual clutch PDK SMG or what ever BMW is using now. Im talking 3 pedals not some computer operated clutch deal... A regular manual transmission only difference being it's a sequential shift instead of H.
Racings another story; closely spaced gears for a peaky torque engine, but the straight cut spur gears would make a radio useless!
Last edited by JerryU; Nov 6, 2014 at 09:14 AM.
Pro
Joined: Jun 2014
Posts: 555
Likes: 126
Im posing this question to people that may have more technical insight than myself. Why haven't any of the hi perforce car manufactures installed a sequential gear box? I know If there were something like that on the market it would catch my eye! They are used in rally cars and motorcycles with great success. They shift faster than the typical H pattern type shifters. I have wondered this for a really long time... Everyone is always taking dual clutch PDK SMG or what ever BMW is using now. Im talking 3 pedals not some computer operated clutch deal... A regular manual transmission only difference being it's a sequential shift instead of H.
Minus the clutch, of course.
Advanced
Joined: Sep 2014
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Drifting
Joined: Sep 2013
Posts: 1,505
Likes: 13
Ferrari, BMW and Aston have all had SMG transmissions in their cars and every one of them were great on the track and horrible on the street. Granted, they were automanuals with computer controlled clutches but regardless they were not ideal for road use.
The C7.R uses a sequential box with paddle shifters and a clutch. Again, great for the track, not so good on the road. The $10k+ price tag doesn't help.
The C7.R uses a sequential box with paddle shifters and a clutch. Again, great for the track, not so good on the road. The $10k+ price tag doesn't help.
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Melting Slicks
Joined: Nov 2005
Posts: 2,074
Likes: 309
I have long wondered why a sequential box can't be done in a car. Motorcycle shifters are essentially a sequential shifter and you can buy an entire motorcycle for what you would pay for just the sequential gear box for a car. If skipping gears is that important, declutch, shift a couple of gears, then let the clutch out.
It would make missed shifts more of a rarity and blown engines from selecting a lower gear than intended almost an impossibility.
It would make missed shifts more of a rarity and blown engines from selecting a lower gear than intended almost an impossibility.
Safety Car
Joined: Nov 2005
Posts: 4,366
Likes: 934
From: Huntsville Alabama
http://www.s1sequential.com/
The bolt on sequential shift conversion changes the standard H pattern gear box to sequential action allowing you to simply push forwards for a down shift and pull back for up-shifts eliminating the chance of missing the 2-3 and 4-5 shifts .
This conversion simply bolts on there is no need to machine of change any internal parts of the gearbox .
The unit has been specifically designed to work with a syncro gearbox ( but will work just as well with dog gear conversions ) and does not need any form of electric assistance to get the job done there for it is still the driver 100% in control and getting all of the feel of the shift through the lever . This was an important part of the design as I think most owners choose the manual gearbox for that feeling of being in total control of the car .
Gear selection is simple as pull back to change up gears push forwards to change down , neutral is half way between all gears like normal and reverse is selected by putting the gearbox in neutral pulling the lever then pushing the lever forwards to engage the gear .
The bolt on sequential shift conversion changes the standard H pattern gear box to sequential action allowing you to simply push forwards for a down shift and pull back for up-shifts eliminating the chance of missing the 2-3 and 4-5 shifts .
This conversion simply bolts on there is no need to machine of change any internal parts of the gearbox .
The unit has been specifically designed to work with a syncro gearbox ( but will work just as well with dog gear conversions ) and does not need any form of electric assistance to get the job done there for it is still the driver 100% in control and getting all of the feel of the shift through the lever . This was an important part of the design as I think most owners choose the manual gearbox for that feeling of being in total control of the car .
Gear selection is simple as pull back to change up gears push forwards to change down , neutral is half way between all gears like normal and reverse is selected by putting the gearbox in neutral pulling the lever then pushing the lever forwards to engage the gear .
Instructor
Joined: Jan 2005
Posts: 138
Likes: 2
From: Canyon Country Ca.
http://www.s1sequential.com/
The bolt on sequential shift conversion changes the standard H pattern gear box to sequential action allowing you to simply push forwards for a down shift and pull back for up-shifts eliminating the chance of missing the 2-3 and 4-5 shifts .
This conversion simply bolts on there is no need to machine of change any internal parts of the gearbox .
The unit has been specifically designed to work with a syncro gearbox ( but will work just as well with dog gear conversions ) and does not need any form of electric assistance to get the job done there for it is still the driver 100% in control and getting all of the feel of the shift through the lever . This was an important part of the design as I think most owners choose the manual gearbox for that feeling of being in total control of the car .
Gear selection is simple as pull back to change up gears push forwards to change down , neutral is half way between all gears like normal and reverse is selected by putting the gearbox in neutral pulling the lever then pushing the lever forwards to engage the gear .
The bolt on sequential shift conversion changes the standard H pattern gear box to sequential action allowing you to simply push forwards for a down shift and pull back for up-shifts eliminating the chance of missing the 2-3 and 4-5 shifts .
This conversion simply bolts on there is no need to machine of change any internal parts of the gearbox .
The unit has been specifically designed to work with a syncro gearbox ( but will work just as well with dog gear conversions ) and does not need any form of electric assistance to get the job done there for it is still the driver 100% in control and getting all of the feel of the shift through the lever . This was an important part of the design as I think most owners choose the manual gearbox for that feeling of being in total control of the car .
Gear selection is simple as pull back to change up gears push forwards to change down , neutral is half way between all gears like normal and reverse is selected by putting the gearbox in neutral pulling the lever then pushing the lever forwards to engage the gear .
Le Mans Master
Joined: Mar 2002
Posts: 6,359
Likes: 163
From: Concord NC
Sure there is a benefit. With a sequential you move the shifter an inch or less each time as opposed to the 4-5 inches for an H pattern.
This is if the shifter itself acts like the one in a Hollinger.
Instructor
Joined: Jan 2005
Posts: 138
Likes: 2
From: Canyon Country Ca.
Sequential and dog ring gear boxes are faster at shifting and a great benefit in racing, because they don't require race driver to cordenate hand and foot movements by removing the need for clutch depression and the extra time it takes.
So there is no real benefit at all with street car's.
Last edited by canyon vette; Jan 16, 2015 at 11:41 AM.
Melting Slicks
Joined: Sep 2004
Posts: 3,153
Likes: 114
True sequential boxes are great for racing with clutch less up and down shifts. However on the road they are utterly ****! Clunky and difficult to operate at light engine loads and when not hammered home. Even the electronic sequential boxes, see mark 1 Aston Martin vantage, are crap and they have propped torque management throughout the shift.
DSG style dual clutch boxes offer all the benefits of a sequential with the smoothness that the sequential a just could never have. They are astonishing and I hope GM get on the bandwagon and soon!!!!
DSG style dual clutch boxes offer all the benefits of a sequential with the smoothness that the sequential a just could never have. They are astonishing and I hope GM get on the bandwagon and soon!!!!