Sometimes when Im driven I float the gears without a clutch (never when racing) It slides right in and out if the rpm is right... Is it bad at all?

 

no, i drive without using the clutch ALL THE TIME, as long as u don't grind the gears ur ok, and depending on the car but for example a gsr with an ls tranny, will go into gear when upshifting when the RPM falls 1400 below the point where u pulled it out of gear and upshifting it's 1400 RPM above the point where u pulled it out, i'm not sure about other cars, but most its 1000RPM difference to up/down shift....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 97 GSR &raquo;</TD></TR><TR><TD CLASS="quote">Sometimes when Im driven I float the gears without a clutch (never when racing) It slides right in and out if the rpm is right... Is it bad at all?</TD></TR></TABLE>

matching the RPMs is okay, but i think it's kinda hard on synchros.....correct me if i'm wrong

 

It has to do with the speeds of the input shaft and different gear shafts inside the tranny. At a certain RPM the speeds are matched and you can shift w/o using the clutch. The only purpose of disengaging the clutch and the synchros is to match the shaft speeds before mating the gears together. If the speeds are already matched, you don't need to disengage the clutch.

But unless you know exactly what point that is in the RPM range, I wouldn't go around trying to find it. It's somewhere in the middle of the range, so obviously you couldn't do it when racing.

And the amount of change in the RPM between different gears depends on the speed at which you change gears. It's not the same throughout the RPM range.

 

PatrickGSR94-always the guy you can listen to...he know's his ****

 

There's an article somewhere that doesn't recommend doing it. Damned if i can remember where it is though.

I don't understand though, why not use the clutch?

 

Isn't this "technique" called clutchless-shifting? Correct me if I'm wrong... but
I've heard of some guys doing clutchless shifting while racing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PatrickGSR94 &raquo;</TD></TR><TR><TD CLASS="quote">It has to do with the speeds of the input shaft and different gear shafts inside the tranny. At a certain RPM the speeds are matched and you can shift w/o using the clutch. The only purpose of disengaging the clutch and the synchros is to match the shaft speeds before mating the gears together. If the speeds are already matched, you don't need to disengage the clutch.

But unless you know exactly what point that is in the RPM range, I wouldn't go around trying to find it. It's somewhere in the middle of the range, so obviously you couldn't do it when racing.

And the amount of change in the RPM between different gears depends on the speed at which you change gears. It's not the same throughout the RPM range.</TD></TR></TABLE>

I agree. It's fun to do every now and then but you can end up wearing out your synchros, then it gets expensive.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GuruFury &raquo;</TD></TR><TR><TD CLASS="quote">Isn't this "technique" called clutchless-shifting? Correct me if I'm wrong... but
I've heard of some guys doing clutchless shifting while racing.</TD></TR></TABLE>

Well, they either have a sequential manual transmission, or they're shifting long long before they get to the power band (and aren't going very fast).

It's nothing new, my dad said he used to do it on his old '70 Chevelle SS.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NeoGSR &raquo;</TD></TR><TR><TD CLASS="quote">

matching the RPMs is okay, but i think it's kinda hard on synchros.....correct me if i'm wrong</TD></TR></TABLE>

A synchro slows down the speed gears on the main shaft to match the speed of the cluster gears... so if the speed of the two shafts is allready matched u can shift w/o disengauging the clutch.

 

hey, short 'n sweet: it's doable, but trying it out isn't for the faint of pocketbook. if you know exactly what you're doing with it, two things:
you can get away with it for a long time before it bites your @$$, and
you've probably already toasted at least one or two trannies in the learning process.
so pretty much, don't mess around with clutchless shifting unless you wanna be taking your tranny out in a couple months and sending it to somebody like me and paying $$$ to repair all the **** you just broke.