Harmful to shift without clutch? - Toyota Yaris Forums

twowheels · 02-06-2009, 09:36 PM

In elementary school I had a bus driver who always shifted clutchless. I was amazed and took up the practice myself later in life for some time (though no longer do). My biggest concern would be if you don't actually rev match the transmission to the engine you'll be putting more force on your syncros, though having seen how some people mash the car into gear without matching it's probably not much worse if you're trying not to. I always teach beginners to shift with their fingertips instead of their palm so that they learn how to guide it into gear rather than force it in.

Tamago · 02-06-2009, 10:09 PM

Quote:

Originally Posted by twowheels

In elementary school I had a bus driver who always shifted clutchless. I was amazed and took up the practice myself later in life for some time (though no longer do). My biggest concern would be if you don't actually rev match the transmission to the engine you'll be putting more force on your syncros, though having seen how some people mash the car into gear without matching it's probably not much worse if you're trying not to. I always teach beginners to shift with their fingertips instead of their palm so that they learn how to guide it into gear rather than force it in.

that right there is the key, with or with out clutch.. we're talkin tiny lil gears here people. if you can't revmatch on an up AND DOWN shift, you shouldn't be driving a manual trans IMO

REM · 02-09-2009, 11:21 AM

Quote:

Originally Posted by Tamago

that right there is the key, with or with out clutch.. we're talkin tiny lil gears here people. if you can't revmatch on an up AND DOWN shift, you shouldn't be driving a manual trans IMO

My Yaris is the first manual car, so maybe I'm a little naive but what is revmatching?

ztlonewolf · 02-09-2009, 02:22 PM

Quote:

Originally Posted by Tamago

that right there is the key, with or with out clutch.. we're talkin tiny lil gears here people. if you can't revmatch on an up AND DOWN shift, you shouldn't be driving a manual trans IMO

the only time you may need to do revmatching on an upshift is if you shifted too slow,anymore than a 1000rpm drop between gears,you would have to rev the engine to match the roadspeed,or not be lazy and use the clutch

Tamago · 02-10-2009, 01:40 AM

Quote:

Originally Posted by ztlonewolf

the only time you may need to do revmatching on an upshift is if you shifted too slow,anymore than a 1000rpm drop between gears,you would have to rev the engine to match the roadspeed,or not be lazy and use the clutch

huh? i rev-match/heel-toe every downshift in my car.. it's a nice treat for your driveline to practice this.

ztlonewolf · 02-10-2009, 10:21 AM

Quote:

Originally Posted by Tamago

huh? i rev-match/heel-toe every downshift in my car.. it's a nice treat for your driveline to practice this.

revmatching is a must for downshifting,my post only refered to upshifting

SeaYa · 02-10-2009, 10:37 AM

OP: I agree 100% that you'll do little / no harm by shifting without the clutch if, like most of the above posts suggest, you rev match carefully. When I first read this, I thought it was rediculous, but then I thought about what was actually happening in the transmission, so, I held my breath and gave it a try from 3rd to 4th. AMAZING! Get the revs right, and the syncs almost guide your throw (more like a left-handed, underhand, one finger toss).

Hope you heal up well!

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02-06-2009, 09:36 PM	#1
twowheels Drives: '09 Meteorite Metallic 3 dr MT Join Date: Jan 2009 Location: CA Posts: 127	In elementary school I had a bus driver who always shifted clutchless. I was amazed and took up the practice myself later in life for some time (though no longer do). My biggest concern would be if you don't actually rev match the transmission to the engine you'll be putting more force on your syncros, though having seen how some people mash the car into gear without matching it's probably not much worse if you're trying not to. I always teach beginners to shift with their fingertips instead of their palm so that they learn how to guide it into gear rather than force it in.

02-10-2009, 10:37 AM	#7
SeaYa Is about to 'SeaYa' later View User's Garage Drives: 08 MT Sedan Join Date: Jan 2009 Location: PA, USA Posts: 232	OP: I agree 100% that you'll do little / no harm by shifting without the clutch if, like most of the above posts suggest, you rev match carefully. When I first read this, I thought it was rediculous, but then I thought about what was actually happening in the transmission, so, I held my breath and gave it a try from 3rd to 4th. AMAZING! Get the revs right, and the syncs almost guide your throw (more like a left-handed, underhand, one finger toss). Hope you heal up well!