Car Forums  

Go Back   Car Forums > General Discussions > General Chat
FAQ Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 03-15-2005, 10:12 PM   #1
VMJYogi
CF Addict
 
Join Date: Jul 2004
Location: Chicago
Posts: 258
Layshaft vs no layshaft

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?
__________________

Self-appointed anchorman of CF. I bring the news with a savvy tongue b*tch!
Now an ever prouder DEP of the USMC
I get fresh from Yankee Stadium to the Gardens i beg your pardon, stop it, my closet Macys mens department pants shirt scarf phone if you checkin get the scoop on the cologne belt and shoe section fur for fur baby baby you'll go stir crazy
VMJYogi is offline   Reply With Quote
Old 03-16-2005, 02:44 AM   #2
88GrandPrixSE
CF Freak
 
88GrandPrixSE's Avatar
 
Join Date: Jan 2005
Location: Regina, Sask., Canada
Posts: 581
Quote:
Originally Posted by VMJYogi
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?

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 is offline   Reply With Quote
Old 03-16-2005, 08:11 PM   #3
shulle3
CF Newbie
 
Join Date: Mar 2005
Posts: 6
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 is offline   Reply With Quote
Old 03-16-2005, 09:27 PM   #4
VMJYogi
CF Addict
 
Join Date: Jul 2004
Location: Chicago
Posts: 258
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?
__________________

Self-appointed anchorman of CF. I bring the news with a savvy tongue b*tch!
Now an ever prouder DEP of the USMC
I get fresh from Yankee Stadium to the Gardens i beg your pardon, stop it, my closet Macys mens department pants shirt scarf phone if you checkin get the scoop on the cologne belt and shoe section fur for fur baby baby you'll go stir crazy
VMJYogi is offline   Reply With Quote
Old 03-16-2005, 10:03 PM   #5
ChrisV
The Big Meaney
 
ChrisV's Avatar
 
Join Date: Mar 2004
Location: People's Republic of Maryland
Posts: 3,714
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.
__________________
I'm not mean. You're just a wuss.



www.midatlantic7s.com
ChrisV is offline   Reply With Quote
Old 03-17-2005, 09:49 PM   #6
VMJYogi
CF Addict
 
Join Date: Jul 2004
Location: Chicago
Posts: 258
Hey i see!! Thanks.
__________________

Self-appointed anchorman of CF. I bring the news with a savvy tongue b*tch!
Now an ever prouder DEP of the USMC
I get fresh from Yankee Stadium to the Gardens i beg your pardon, stop it, my closet Macys mens department pants shirt scarf phone if you checkin get the scoop on the cologne belt and shoe section fur for fur baby baby you'll go stir crazy
VMJYogi is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Forum Jump



All times are GMT +1. The time now is 03:35 PM.

Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2002 - 2011 Car Forums. All rights reserved.