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I'd like to know if there are manual transmissions with no layshaft. EX.
the input shaft would have gearing on it and the driveshaft would be
directly above or below the input shaft with no need of a layshaft. Has
this been done? Is it still done? If not wouldn't it be a good idea to try
it? What would be the problems with said tranny?
VMJYogi
Do you mean the driveshaft would have gears on it...? Because that'd be the
only way to transfer the power to the driveshaft from the input shaft.. If
that's what you're saying, well, it has been done, it is done, but only on
small applications. ie: 2 speed R/C cars. But in the real world, never been
done to my knowledge. There'd be loads of problems with something like
that, like there'd be no oil to cool it/lubricate it so it would wear and
over-heat very quickly.
88GrandPrixSE
The layshaft you refer to is actualy a countershaft. and no it would not
work without a countershaft. wouldnt be able to get reverse without an
idler off of the countershaft so no you cant have one without a
layshaft(countershaft).
shulle3
Couldn't you have an idler off of the input shaft directly onto the
driveshaft? And yes there would be gears on the driveshaft. and the oil
system could relatively be the same. if you look at how mnual transmissions
work on howstuffworks.com u'd see what i was askin if ur confused as to my
question. Go to http://auto.howstuffworks.com/transmission5.htm and look at
the second picture down. Now imagine that the green shaft and gear are
removed from the equation and instead the red shaft extended further to the
left to the engine. I know u'd have to change the gear ratios around but
could it work?
VMJYogi
Actually yes, it could easily work in that example, as often that first
gear ratio over to the second shaft is a 1:1.
The reason it's done the way the diagrams have it is to center the output
shaft (and thus the driveshaft) with the input shaft. it gives a nice line
of torque through the transmission. and so al lteh parts spin in the
correct direction (doing it your way would reverse the spin of the
driveshaft in relation to the engine)
But, either way, there's still two total shafts in the transmission, so
you're really not gaining anything.
ChrisV
Hey i see!! Thanks.
VMJYogi
