What are those gear boxes called that you just push the lever forwards and backwards?
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15 July 2003, 08:51 PM
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The "sequential" gearboxes you find in most road cars are variants of either torque-converter automatic or CVT boxes, which explains the clumsy, slothful gearchanges.
Motorsport sequential boxes are basically manual dog boxes with epicyclic shift linkages. With these it's not actually pushing or pulling the gear lever that makes the gears change. All the lever does is prime the shift mechanism - the rotation of the transmission itself actually drives the shift - a bit like the derailleur gear mechanism on a push bike.
Motorsport sequential boxes are basically manual dog boxes with epicyclic shift linkages. With these it's not actually pushing or pulling the gear lever that makes the gears change. All the lever does is prime the shift mechanism - the rotation of the transmission itself actually drives the shift - a bit like the derailleur gear mechanism on a push bike.
15 July 2003, 09:48 PM
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greasemonkey is talking along the lines of what I'm after. I'm not thinking of the push button stlye auto boxes. This was a great big metal lever thing. Looked cool as f*ck, they used it on the rally focus I think.
15 July 2003, 11:13 PM
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Nawwww
its a crash box!!!
bang it forward and it slows... bang it back and it speeds up...
question why does an rs box need two additional rods attached to the gearstick... if i have seen rightly the lever does natch
just moves two selector rods.... more potential trouble to go wrong at a later date...
Mart
its a crash box!!!
bang it forward and it slows... bang it back and it speeds up...
question why does an rs box need two additional rods attached to the gearstick... if i have seen rightly the lever does natch
just moves two selector rods.... more potential trouble to go wrong at a later date...
Mart
16 July 2003, 11:55 PM
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Chaz, there's no way of getting that sort of box in a Scoob roadcar, beyond paying someone like Hewland thousands to design a bespoke one for you.
TBH though they're as much a pain in the butt as an advantage. There are many rally drivers who prefer a conventional stick shift to a mechanical sequential...
TBH though they're as much a pain in the butt as an advantage. There are many rally drivers who prefer a conventional stick shift to a mechanical sequential...
17 July 2003, 12:19 AM
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Yep, there is no way of skipping a gear if you spin it or go off.
Prodrive have now got their WRC's to change gear in 18 milliseconds! How cool is that!
I suppose the downside is the 'box only last a couple of rallies and costs about £50k.
You can get clubby sequential boxes for £5/6k.
Prodrive have now got their WRC's to change gear in 18 milliseconds! How cool is that!
I suppose the downside is the 'box only last a couple of rallies and costs about £50k.
You can get clubby sequential boxes for £5/6k.
17 July 2003, 12:32 AM
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The semi-auto boxes last a lot longer than that. The wear on the internals is lower with the automated shift than it was when the drivers had their hand on the gearstick!
They might get stripped every rally, but many of the internals will be crack-tested and reinstalled.
They might get stripped every rally, but many of the internals will be crack-tested and reinstalled.
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