tia
chaser
Float, less work.
jponkey wrote:
>which do you do? why?
>
>
>tia chaser
>
both.
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"chaser" <jpo...@nospamcomcast.net> wrote in message
news:Xns932B883D5554Ajp...@216.166.71.239...
Thanks..
"Troublemaker" <surfingtr...@yahoo.com> wrote in message
news:W6K6a.261745$Ec4.2...@rwcrnsc52.ops.asp.att.net...
If I can butt in, here's what I would offer:
Here's the technique for my truck, while accelerating, put your hand on
the shifter and applying light pressure pushing the shifter toward
neutral, then slowly lift your foot off the "gas" while remembering the
RPM where you pulled it out of gear. The shifter will fall out of gear
into neutral. Let's call this part "floating out of gear". That's the
easy part.
Now here's the harder part, with the shifter in neutral, boost the RPMs
and let them fall and once they *fall* about 300-400 below the RPM where
you took it out of gear, slide the shifter into the next higher gear.
Before you do this you need to be able to reliably boost the RPMs by
that key amount which can be found by noticing the RPM difference
between one gear and the next gear for a steady speed. For example,
drive 50 MPH in one gear and then shift to the next higher gear and then
maintain 50 MPH. Notice the difference in RPMs between the two gears.
In my truck that difference is 300-400 RPM.
You manipulate the RPMs much the same when double-clutching as when
floating gears, the clutch just allows a broader range of RPMs for you
to shift gears. When floating, you have to be a bit more precise with
the RPM difference or you won't be able to put it back in gear.
If you want to use "training wheels" first, you can try this. Float the
gear shift out of gear but use the clutch to put it back in the next
gear. It sounds much more complicated that it is in practice.
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"Anti-Americanism is an emotion masquerading as an analysis, a morality,
an ideal, even an idea about what to do".
Todd Gitlin
Seems like you're increasing the RPM on Up-Shifts, then letting RPM fall the
usual 3-400. Is there a timing element there? Why not just let the RPM fall
in Neutral and "float" into gear when the revs. match?
Just trying to learn...I've found myself "floating" several shifts, but by
accident!
"tscottme" <blah...@blah.net> wrote in message
news:lqCdndnw18J...@comcast.com...
Yes, it is normal to pull it out of gear, increase the RPMs and then
when they fall the desired amount, and then put it in the next gear.
It's all about timing. The new person generally over revs and under
revs which is the problem. If you are quick enough you should be able
to avoid "goosing the throttle" and waiting for it to fall. Some
transmissions fall slowly and some fall much quicker.
I would practice being able to reliably "goose or bump the throttle" up
the few RPMs needed to match.
BTW, most people have more trouble floating the gears when downshifting
than when upshifting.
thank you all for your participation
i personally float except at lights and stop signs.
the reason i asked is, i was told a while ago how much easier it is on a
trans to double-clutch. sorry i can't do it. i was taught to drive a
truck by floating gears.
i never thought i'd be able to describe the process. some here have
done a good job.
holding light pressure towards neutral then easing off the throttle is
the best. the only thing i would add is to wait a split second before
even trying for the next higher gear. usually it will fall right in.
downshifting? over-revving i don't think is so much the problem. from
those unfamiliar with it, that i've watched, most will not be patient
enough for the trans to slow to match the engine. floating out of gear
the same as when up-shifting, then over-revving and holding LIGHT
pressure on the next lower gear, then just before the shifter falls into
the next lower gear, goosing the throttle again. how frustrating this
is to watch! it definatly can only be learned by doing it.
i was curious what you old-timers would say. i've been driving for
nearly 15 years. semi's for only 2.
now can someone please describe to how to back up?! lol
chaser
same here
Oops. I made a mistake. You may not have to increase RPMs and then let
them fall before changing gears. If your tranny allows RPMs to fall
slow enough you probably won't need to bump the throttle prior to
changing gears. I was confusing the throttle procedure when
double-clutching and the RPM behavior when floating.
Sorry for the confusion.
Thanks for the encouragement!!!
"tscottme" <blah...@blah.net> wrote in message
news:uv6dnTLbq-Y...@comcast.com...
Jamie...."road train"
"chaser" <jpo...@nospamcomcast.net> wrote in message
news:Xns932B883D5554Ajp...@216.166.71.239...
From my experience and listening to other drivers, most of the trouble
when floating, especially when downshifting is from not reliably
matching the RPMs. For example when attempting to downshift the driver
may over rev and then miss the RPM when they do fall to the right spot.
Then they under rev and miss again. Then when they try again, the road
speed has fallen enough that hitting the RPMs exactly for the initial
attempt is wrong. My first truck had a Rockwell tranny and the revs
dropped pretty fast. The Eaton transmissions I have been in since fall
much slower.
Then there is the switch from a 9 speed to a Super 10 where the air
splitter is used in a very different manner. But that's a story for
another day.
I'm glad it is working out.
Just curious... I was under the impression that the revs dropping fast or
slow was a matter of the type of engine I was running. To me a Cummins
engine would drop rpm's fairly fast, while a Cat engine was a bit slower to
drop, and a Detroit Series 60 was even slower to drop.
Is it the engine or the transmission that makes more difference here?
--
Nick
I don't know which controls the RPMs more. All the trucks I have been
in until this last year were Deeeeetroit 60. My current truck has a
Cummins. You're probably right that the engine is what is affecting how
fast the RPMs drop.
This is what happens when you want to use engine speed for braking, either a
normal engine or a Jake - get the engine rpm a little lower that they are at
that road speed and the engine resisting the transmission speed (driven by
road speed) causes the truck to slow down.
"tscottme" <blah...@blah.net> wrote in message
news:nYudnXhI8uU...@comcast.com...
I understand that. I was just wondering what it is that causes different
manufacturers engines to drop rpm's slower/faster than others? Internal
moving mass?