CLASS RACER FORUM - View Single Post - Difference between Clutched and Clutchless transmissions

Mike Taylor 3601 · 02-11-2010, 10:08 PM

To add to Jim's description, sliders are split with coast side of slider/dogs on gear cut on angle like ramp, so for example when you make 1st to 2nd gear change trans actaully stays in 1st then when 2nd gear engages and increases shaft speed causing 1st gear to disengage due to slider&gear meshing ramps together pushing it out of 1st gear,and same thing happens on each gear change,thats why if car unloads trans(ex.coast or severe tire spin)it comes out of gear except for high gear but you still have to hold it in gear if you left off gas in high,you can pedal it in high gear but have to physically hold in gear.
The only difference w/clutchless is on gear changes trans is pulling all the time,where shifting clutch type w/o clutch there is split second that trans is in neutral on gear changes just like automatic there is split second where trans is in neutral during gear change,they have to disengage lower gear before next gear can be engaged where clutchless does'nt.
The only advantages I know of with clutchless is chassis stays loaded during gear changes while clutch style shifting with or without clutch or automatic the chassis does'nt stay loaded completly during gear changes,which can make car smoother if everthing is right.
Then other advantage is takes less muscle to shift clutchless trans than clutch type shifted without clutch. I don't know if alot of people realize that you have to physically pull the trans out of gear while its under a load when shifting without clutch.If you ever tried to pull manual trans out of gear under a load in a everday car/truck you know what I'm talking about let off gas comes out easy.Can you imagine how hard you would have to pull &push shifter in SS/AH car to shift without clutch.I shifted a my brothers K/S car with Jerico without clutch hurt wrist and elbow he said you learn how to do it without hurting yourself.
You will see cars go quicker but I don't think it will be huge difference w/o clutch you get about .08 clutchless I'd say you'll see about another .05-.08 thats a somewhat educated guess.
Mike Taylor3601

02-11-2010, 10:08 PM	#6
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,361 Likes: 333 Liked 279 Times in 96 Posts	Re: Difference between Clutched and Clutchless transmissions To add to Jim's description, sliders are split with coast side of slider/dogs on gear cut on angle like ramp, so for example when you make 1st to 2nd gear change trans actaully stays in 1st then when 2nd gear engages and increases shaft speed causing 1st gear to disengage due to slider&gear meshing ramps together pushing it out of 1st gear,and same thing happens on each gear change,thats why if car unloads trans(ex.coast or severe tire spin)it comes out of gear except for high gear but you still have to hold it in gear if you left off gas in high,you can pedal it in high gear but have to physically hold in gear. The only difference w/clutchless is on gear changes trans is pulling all the time,where shifting clutch type w/o clutch there is split second that trans is in neutral on gear changes just like automatic there is split second where trans is in neutral during gear change,they have to disengage lower gear before next gear can be engaged where clutchless does'nt. The only advantages I know of with clutchless is chassis stays loaded during gear changes while clutch style shifting with or without clutch or automatic the chassis does'nt stay loaded completly during gear changes,which can make car smoother if everthing is right. Then other advantage is takes less muscle to shift clutchless trans than clutch type shifted without clutch. I don't know if alot of people realize that you have to physically pull the trans out of gear while its under a load when shifting without clutch.If you ever tried to pull manual trans out of gear under a load in a everday car/truck you know what I'm talking about let off gas comes out easy.Can you imagine how hard you would have to pull &push shifter in SS/AH car to shift without clutch.I shifted a my brothers K/S car with Jerico without clutch hurt wrist and elbow he said you learn how to do it without hurting yourself. You will see cars go quicker but I don't think it will be huge difference w/o clutch you get about .08 clutchless I'd say you'll see about another .05-.08 thats a somewhat educated guess. Mike Taylor3601