You have identified the trickiest part of shifting.
When I got hired to my first job my instructor finally said "I know this may
be difficult, but I want you to forget what ever they told you about
shifting and double clutching in school. Let me show you how to shift
gears."
Then he proceeded to tell me not to use the clutch unless I was starting out
or backing. Do not force the shifter, apply only fingertip pressure.
The trick to down shifting at low speeds is to remember the speed range of
each gear. In practice you will be going about the same speed when you go
around each turn so you can usually expect the same gear (usually 3rd or
4th).
It just takes a little practice and a little thinking before you make the
turn. It will soon become second nature.
Really tricky shifting also happens on steep grades and with heavy loads.
You loose ground speed rapidly so the usual wind down of the engine speed is
not fast enough to keep pace. Here the trick is to set your Jake to a low
setting so the engine slows quick enough to catch the gear.
To practice the low speed gear selection, find a road without traffic and
slow down to various speeds and try to pick your gear. Soon it will come to
you. Then you will change trucks and have to re-learn.
Also I would be up front with your trainer and tell him that you are weak in
this area and have him demonstrate to you his way and try it. There is no
shame in ignorance, that can be cured.
--
Roger Shoaf
If you are not part of the solution, you are not dissolved in the solvent.
"Martin Loomis" <bpm...@adelphia.net> wrote in message
news:HtWdnVf4h4GZcMDY...@adelphia.com...
No one can teach you to shift, anymore than someone can teach you to fish,
or have sex.
You learn the basics, and then practice, practice, practice.
And don't try skipping or slipping until you can do them in the correct
order- fuck everybody else- make 'em wait.
If they need to be in front of you so bad, they should have started
earlier.
Each transmission is different, and each truck has a different amount of
wear on the same transmission.
Give yourself a break and just drive.
ps. make sure the engine brake is off whenever you don't need it. :-)
The trick to shifting is to match your engine speed to the
transmission speed. When you are gearing up you start off low rpm
and increase them as you accelerate. When you shift to a higher
gear the rpm drops and then increases again as you accelerate.
When you are gearing down the opposite is happening. You are
reducing rpm as you slow down, so you need to tap the accelerator
to boost the rpm to match the transmission speed.
Take the time to find out how fast 1500 RPM is in a few of the gears.
The reason being, lets say 7th gear is 35 mph at 1500. Then when your speed
drops to 35, rev the motor to about 1500 and put it in 7th gear.
This might not work for every downshift but it helped me quite a bit. After
a while of that, then you can forget the speedometer and the tachometer.
The most common problem I found teaching shifting is the tendency for
the student to depress the clutch pedal too far and engaging the clutch
brake. Especially as they approach near panic and are frantically
"rowing a boat" looking for a gear.
The most competent shifters can do an "idle-match", that is, with the
truck in motion and the tranny in neutral select the closest gear
corresponding to the engine rpm or raise the engine rpm using the
throttle to provide the match.
It will vary by engine/transmission combination but a 700rpm idle/gear
match chart -might- look something like this:
1 - 1-2 mph
2 - 2-4 mph
3 - 5-9 mph
4 - 9-13 mph
5 - 13-18 mph
6 - 18- 24 mph
and so on. You lose a gear you just look at the speedo and choose the
closest gear. Chances are, you can find a gear without dropping into
low range even at low velocity.
A common rpm "split" between gears in the +-1200 to 2000 rpm range is
400 rpm: When you reach 1600 rpm and upshift the next gear will match
at 1200. 1800/1400, 2000/1600, and so on.
Works the same way downshifting. If you want to skip a gear use an 800
rpm split.
When you get down into the rpm range between 700 and 1200 the split(s)
grow smaller and the upshifts need to made quickly. That's what makes
progressive shifting a faster way to get through the gears and saves
fuel by operating the engine at the lower rpm of the torque curve.
Modern transmissions are practically indestructable. Find a lot where
you can practice matching gears without the pressure of traffic. It's
not that hard.
-----
- gpsman
Wow, it sounds like they expedited your learning.
Out of curiosity, how many weeks was your school? Mine was 3 weeks
classroom 7 weeks driving and we loved our instructors. Fact is it was the
most fun I'd ever had in class and I have fun in other classes too.
This post will have to be cut short since someone helped me celebrate my
last birthday a little late. <G> Oh, don't worry too much, she drove me
home too.
One trick I would suggest, besides more practice, is to know what gear you
will try at a typical 90 degree corner intersection, the type of
intersection you will see most commonly. Yould be well served to take that
type of corner at the same slow speed. In my truck with a 10 speed, not
Super 10, I take this 90 deg turn in the first gear in high-range. Because
I take this turn at the same slow speed, I take the turn in the same gear.
You can get the same practice at any speed because the problem for new
drivers is the manual pracitce of downshifting, not picking one gear or
another. As Gpsman said, I would bet money you are pressing the clutch too
deep, like most new drivers. You only press the clutch about 1/2 of it's
travel unless you stopped. In fact, 1/2 travel is probably to far for most
on the road shifting. Unlike a car, in the truck you just press the clutch
only as far as necessary to allow you to move the shifter. In a car, you
use the clutch more in a 100% down, or 100% up manner.
The particular skills you need to develop are "goosing the throttle" to
bring the rpms to the same amount of increase every time. In my truck the
difference between a lower gear and a higher gear in low-range is about 400
rpm. In high-range the difference between gears is about 500-600 rpm.
You can find the gear difference in your truck my driving the same speed in
different gears. Get the truck rolling, shift up into a gear and stablize
your speed. I'd suggest you get your truck into the highest gear in low
range. Then let your speed drop until the rpms are at the low point of your
power band. Then downshift one gear and ance agin stabilze at the same
speed as before. The rpm difference will be about 300-400 rpms in most
cases using commonly used fleet-spec trannys. Repeat the same procedure in
the high-range.
Almost every new driver has the problem you are describing. Almost every
driver has more difficulty downshifting than upshifting. While you ,ay not
want to do this after you feel more experienced, while you are learning try
to downshift only one gear at a time and not "coast" the truck in
preparation for going around a corner. It really complicates matters if you
are trying to drop 2 or more gears and also get everything right. You must
throw "hurry up" out of your mental inventory now that you are in the truck.
The truck doesn't hurry up very well even if the driver is experienced.
It's the pressure to hurry up that just makes everything more difficult and
puts you in worse situations. If your options are hurry up or wait, always
pick hurry up. Just say "no" to hurry up.
--
Scott
Drain the swamp. Deport Islam. Until Muslims observe and protect
human/religious rights of others they should not be allowed to remain in the
West. Islam, as practiced, is incompatible with Western freedom.
"Martin Loomis" <bpm...@adelphia.net> wrote in message
news:HtWdnVf4h4GZcMDY...@adelphia.com...
--
Scott
For shifting, I would suggest you always downshift even when it looks like
you can skip it and get away with it. The more practice you get the sooner
you will incorporate the difficult task into your inventory. Everytime you
avoid doing what you fear, the longer it will take to become any good at it.
Many drivers I know with years and years of road experience can't back into
a tight spot worth a damn. Their backing skill, after years of never
backing in unless there is no other option, is about the same as it was in
their first or second year of driving. I know this because I watch them do
exactly the wrong thing, making rookie errors, and I get to talk to them and
commiserate with them about the tight space at the customer and they wil say
things about how many years they have been driving and such. They typically
start cranking the steering wheel far too late and when they "pull up" they
correct in thw wrong direction. You have to point the rear of the trailer
toward the spot want it to go. If you are too far to the left, when you
pull up you have to point the nose of the trailer farther to the left, which
points the tail of the trailer toward the right. It takes a lot more space
than necessary to pull up and correct to the right. If there is an
abundance of space forward of the tight parking spot this bad practice may
not be discovered for a long time.
--
Scott
Drain the swamp. Deport Islam. Until Muslims observe and protect
human/religious rights of others they should not be allowed to remain in the
West. Islam, as practiced, is incompatible with Western freedom.
"Martin Loomis" <bpm...@adelphia.net> wrote in message
news:aM2dndAvsdZl98PY...@adelphia.com...
I learned to shift a 10 speed from the freightliner used truck dealer.
He tried to teach me double clutch, but wasn't doing a good job in
trying, so I just used the clutchless float method by matching RPM's to
the tranny speed and it just worked for me (I only knew about that
'cause my dad taught me in a Nissan pickup I used to have that had a
syncronized tranny) which was my lucky break. This tranny was still
hard to shift and I grinded the hell out of it for my first couple
hundred miles of in town driving (of course, once on the freeway you
don't have to shift much).
Anyway, for downshifting, he taught me to throttle it a bit to raise
the RPM's and gently push the stick towards the desired gear. You can
feel the teeth by doing that and eventually the stick will get in the
gear slot.
Try it. Get up to about 10 or 15 miles per hour in a secluded spot and
coast until your RPM's are at about 1200 RPM's and then touch the
throttle to rev the motor up slowly. As the motor revs up, push the
stick into the next lower gear (say from 5th to 4th gear). You will
feel a little grinding feeling, but if you don't push hard and get the
RPM's up to around 1400 or 1500 you will start to feel the teeth
mellowing out and it won't be so much of a grinding sensation but
instead of a knocking feeling.
At that point, you are just about there - keep reving until it pops in
gear.
Martin, I hate to tell you this, but the day after I posted about getting my
CDL this poster(tscottme) was bitching about who I should reply to. It
ended up with others jumping on his ship and started the most stupid flame
war/ shit throwing contest on this newsgroup I've ever seen. tscottme/Scott
doesn't even see most my post so his opinions could be tainted by his
killfile.
more at: http://mtt.JusticeGoneWild.com
To Martin or Any New Poster/Driver:
This poster, Rocky, aka Roger Wittekind, aka, a thousand other
screennames is a moron. He's been trying to pass himself off as a
truckdriver for years but the regular posters here saw thru his charade
very early on
Martin, you'd be wise to not even read his posts. 99% of them is just
constant whining and crying about how he has been done wrong by
everyone in the world just as he did in his reply to your post. . He
can't take responsibility for his own actions. He has been a thorn in
the side of this group since his arrival. Please try to just ignore him.
You're right about backing a semi. You go to a truck and trailer and you'd
looked like a rookie. It's what ever you're driving you need to leave the
skills of backing to.
I'm sorry but I wouldn't let you feel a little grinding in our trucks. The
clutch is there for a reason. If you can't shift cleanly then use it. You
don't have to double clutch, you can press the clutch in when you select the
gear. You do that so you don't bang the gear which I know all of us have
done.
> I'm sorry but I wouldn't let you feel a little grinding in our trucks. The
> clutch is there for a reason. If you can't shift cleanly then use it. You
> don't have to double clutch, you can press the clutch in when you select the
> gear. You do that so you don't bang the gear which I know all of us have
> done.
The first tractor trailer I drove was equipped with a %x4
auxiliary transmission. Once I learned how to work that
transmission I found it easier not to use the clutch at all.
Having the right engine rpm for the speed was the key to shifting
smoothly.
This guy has been giving me total shit ever since he thought I was Richard
way back on March 25, 2004. He has an obsession with me I can not break. I
have a whole website just about his BULLSHIT BULLSHIT BULLSHIT.
http://mtt.JusticeGoneWild.com/rt.htm
He complains that I whine well, I whine about his BULLSHIT BULLSHIT BULLSHIT
and I didn't always do that until Dave Ruff/USNCB/Gashauler started to help
him with his BULLSHIT like his BULLSHIT about my CDL that he can not stop.
Luckily for me I already had some experiece before school.
My first trainer I had I noticed he was "floating" the gears. After I got
into my own truck, I taught myself how to do it.
No compay is gonna put a rookie behind the seat without a trainer. If they
do, they're dumb as shit.
What you need is a large company that has an abundance of trainers. If you
have a squeaky clean record, try Schneider out of Green bay, Wi.
Roehl, out of Marshfield, Wi. is an excellent small company to work for.
They also have their own school.
Roehl also has a rather unique home time program if you live in the area.
just keep looking. Someone will get you moving. but do remember that
trucking is going into a slow down period right now until after about
mid-janiuary.
Dave you know as well as I do a 4X4 is alot tougher than any other tranny
out there. When I give a new hire the road test I want to see the clutch
used. They can buy their own truck to bang their own gears.
Oops, I must have had the shift key down and got a % sign instead
of a 5, and then it slipped through spell check. It was a 5 x
4. It must have been tough. I had to teach more than a dozen
people to drive that thing and none of them found it easy. When
you miss a gear you miss, and you might as well pull over because
no amount of forcing would help. But when you shifted at the
right speed and hit the accelerator just right, it would slide
ride in with no effort. Once you mastered a 5 x 4, any other
transmission was a piece of cake.
I had forgotten this trick, but after thinking about your post and seeing
the graph you posted, fifth gear is the easiest one to hit in a sharp turn.
The reason why fifth is so easy to hit is because all you have to do is
basically match the speedometer and the tach. If you are going 15 mph, rev
the motor to 1500, if you are going 10 mph rev the motor to 1000 rpm etc.
I used that trick on one of my road test and after a sharp turn, I hit the
5th gear on the very first try. That and getting so close to a curb at the
same time without hitting it made me look like a super trucker. Too bad I
can not do stuff like that all the time.
I hope this post gets to you, but even if it doesn't I plan to make an story
using with two of your threads.
Many Thanks.
I have an 18 speed transmission. Or is it 13? Or is it 9?
Or is it 10?
I forget.
Shut up, stupid.
-----
- gpsman
Martin, you best ignore this character. He always post bad advice and is a
self admitted road hazard. Luckily he doesn't drive a truck.
Ok, so I should have reminded posters that Martin is dealing with a 10 speed
since he had posted this URL in another thread:
http://www.universaltruck.com/tech_library/TP93255.pdf
I tried something today that worked pretty well. Let us say you are going
about 42 mph, what gear to do you shoot for and how high to you take the
tach?
From the chart above you want 8th gear and you can assume 35 mph is close
to 1500 RPM and 45 mph is about 2000 RPM. So take a quick look at about
where the speedometer is between 35 and 45 and then get your tach about the
same between 1500 and 2000 RPM and then put it in gear. No grind, no
chunch, no nothing, as if it was a perfect mesh! Damn I'm good. <G>
It's funny, I tried to help Martin and I learned a way to drop it in gear
without the waiting I used to do. Note: I used to wait to go into gears at
the point they match the speed for 1500 RPM. Now I know a way to bypass the
wait by interpolating the RPM I want.
I guess I finally gradulated to "Super Shifter" after all these years. Yep,
the obvious still holds true. OTR drivers don't really learn to shift since
they don't have to shift that much on the interstate.
Hey RT, do you want me to teach you how to shift like a pro? I can do that.
OK, gpsmane, I'll make you the same offer I just made ouRTrasher.
Having the experience you claim to have, if you have to consult a graph
and watch the tach....you are not a truck driver and do not belong
behind the wheel.
I learned how to shift without looking at the tach and speedmeter, but
Martin was asking for help, so I decided to go back and see how I did things
when I started.
Yes, I had forgotten about that fifth gear trick and it saved one of my road
test. But now I know I can get into gear on the first try from any speed
after coasting and I can explain how to do it to others.
Once again, I can see you don't want to believe a third party messed you up
big time and that is OK, but sooner or later you might have to face it.
I have no idea what you are babbling about in that last paragraph but
thats no surprise. Neither does anyone else but you.
Martin needs help from an experienced safe driver. Not one with many
tickets and who admits to such things as not setting the trailer
brakes, using a laptop while driving and a bunch more.
That last paragraph means that it was tscottme that fed you with that crap
about Richard and Rocky being the same poster. That was your big farce
behind this stupid war game on March 25, 2004.
> Martin needs help from an experienced safe driver. Not one with many
> tickets and who admits to such things as not setting the trailer
> brakes, using a laptop while driving and a bunch more.
First, no one else *really* ever tried to help Martin get his truck in gear
after coasting. Remember his cry for help, it was this:
"The worst and most embarrassing is when I slowed
before a turn, tried to downshift, couldn't get in gear (grind grind) and
was stuck in neutral. . . . ."
The term for that is "Gear Recovery" from this post:
http://groups.google.com/group/misc.transport.trucking/msg/f95076177d7e3783
Now that we know he was talking about a 10 speed, from one of his other
post, all someone would have had to say is wait till you slow down to about
15 mph, rev the motor to 1500 RPM and put it in fifth gear.
Or tell them 1500 RPM at 25 mph and put it in 7th gear as this poster stated
on a "Gear Recovery" thread before.
"25 MPH @ 1500 RPM = 7th gear in a ten spd "
http://groups.google.com/group/misc.transport.trucking/msg/478b23fbd1bb37c1
While gpsman gave Martin a pretty good answer, after Martin posted that
"Step Chart" gpsman no longer had to make statements like "might- look
something like this:" but gpsman would continue with his "might- look like:"
beating around the bush and not giving him a definite answer.
He was asking about "Gear Recovery" Tim and all someone had to do was tell
him the same thing mueller told someone on Sept 30, 2003, about 25 MPH @
1500 RPM and 7th gear for a ten spd. Now are you going to bitch about what
mueller posted just because it was simialr to what I posted? I'll bet you
are.
Instead many of the K00ks here decided to hijack Martin's thread and forget
that he was really asking about "Gear Recovery" even after he posted that
"Step Chart."
Are you happy that the K00k here might have run Martin off.
HUH? Does that mean I hold a CDL again? Oh god you flip flop more times
than a female.
Both the following quotes are from realtytrasher.
"I hereby acknowledge Rocky is the holder of an IL Commercial Drivers
License"
http://groups.google.com/group/misc.transport.trucking/msg/ed566accd72133a1
"He's been trying to pass himself off as a truckdriver for years but the
regular posters here saw thru his charade very early on"
http://groups.google.com/group/misc.transport.trucking/msg/f89267698571510f
No, you don't have to use a graph for your own truck, you know how many
gears it has, well at least I hope *you* know.
As for "watch the tach." Are you afraid that if get caught glancing at the
tach someone will think you are not a truck driver? God you are crazy.
March 4, 2006
I hereby acknowledge Rocky is the holder of an IL Commercial Drivers
License"
http://groups.google.com/group/misc.transport.trucking/msg/ed566accd72133a1
November 18, 2006
On Nov 18, 12:22 pm, "Gashauler" <swordfi...@comcast.net> wrote:
>.I'm sorry but I wouldn't let you feel a little grinding in our trucks. The
> clutch is there for a reason. If you can't shift cleanly then use it. You
> don't have to double clutch, you can press the clutch in when you select the
> gear. You do that so you don't bang the gear which I know all of us have
> done.
hundreds of miles was a little exaggeration, but you get the point.
Anyway, it didn't take long to quit grinding - of course there are some
occasions where I do grind. If I am heavy and starting out going up
hill, I tend to use the clutch because floating isn't fast enough to
bring the rpm's down before I am back at a dead stop.
As with anything not natural, driving a truck just takes practice.
Just as you were all talking about backing up. My first times, I had
no experience and no one to give me any tips - I only had in mind what
I had seen others do at truck stop stalls. I made an ass of myself in
backing a few times, but at least I never hit anything. Now I am just
fine at it... I don't always it the spot on my first try, but I am just
as good backing on the blind side as I am on the left shoulder (it
helps having that power mirror switch on the blind side, I don't think
it is possible without it - the convex mirror images are too small).