Panduan Transmisi Manual: Transmisi Constant vs. Sliding Mesh

Hello everyone, welcome to

our discussion session this time. Honestly, I'm

super excited because today we're

going to thoroughly explore something

really exciting. A combination of history,

mechanical engineering, and of course a bit of

automotive nostalgia. For those of you who are always

curious about how the engine works

behind the scenes or more precisely under the

hood, well you've come to the

right place. Today we're going to unpack the

mechanical genius of a

manual transmission. We will see together the

crazy evolution of Tuas Perselling.

From its early,

arguably crude designs to the

modern engineering marvels you're probably

riding today. Come on, let's just get

started. Okay, before we go

any further, have you ever wondered

why drivers in the past

often called their manual transmissions

crash boxes

? Just imagine yourself

sitting in the driver's seat of a vintage car.

You hold the steering wheel and try to shift

gears without destroying the entire

gearbox system. Sounds scary, right?

This crash box nickname didn't just appear

suddenly. This is truly born

from real experience which honestly

must be frustrating on the highway.

Well, to understand where

this scary nickname comes from, we have to go back

a bit to the early days of this technology

. Part one, the evolution of

manual transmission.

Well, let's start our time travel

by dissecting one of the

earliest and oldest types of gearboxes

in motor vehicles. It's called a sliding

mesh gearbox. You could say this is the

grandfather of all manual transmission systems

that we know today. This system is

often found in

old vehicles. The way

it works is that to change the speed of the

gear on the main shaft,

it actually has to be physically shifted

to the left or right. The goal is

simple so that the gear can catch

or mash with the gear that fits

on the opposite shaft which we call the

countershaft. What is mind-blowing is the

physical movement of shifting gears,

which gave birth to the term shifting

gears, which

we still use today. Cool huh.

So how does it work in practice? Let's

dissect the steps that

drivers of that era had to take. First,

they have to physically move the lever to shift

gears. It looks easy,

wait a minute. This second step is the

main problem. The driver must

manually adjust the speed of the input shaft and output shaft to get it right. This old machine is

really demanding.

If the rotational speed of these two shafts is

not perfectly synchronized before entering the

third step, which is joining the parts

called dog teas, the system

will not work. So it's not

just about stepping on the clutch and pulling the lever.

It's like a mechanical dance that

requires truly extraordinary instinct, sensitivity, and rhythm

from

the driver. Moving on to the second part,

sliding mesh as a crash box. This is where

the disaster lies, eh, I mean the

main problem, yes. This sliding match was

indeed a major breakthrough for its time,

but this system brought mechanical problems

due to the extremely high level of friction

and the demands for precision that were almost

impossible for ordinary drivers.

Our sources note that the shaft speeds were

not properly adjusted from the start.

Well, this is the original quote. The teeth or

teeth of the gears that are rubbing

are not aligned and they collide with each other

. Collision? Can you imagine

? It produces a

very painful metal cracking sound. Just imagine

iron colliding with iron at

high speed. If the driver fails to maintain the correct

rotational speed, these gears

will not mesh smoothly but will even

hit each other. So it's no surprise

that this early system got the

very accurate nickname, crash box. Moving on to the

third part, the presence of constant mesh.

Luckily, our automotive engineers did

n't give up there.

They are very aware that not

everyone is born to be a

professional racer with perfect mechanical instincts,

right? So a

new technology emerged that was truly a

life saver for drivers, the

constant mesh gearbox. Initially,

this innovation was used more in

large vehicles such as trucks or

agricultural tractors before finally becoming the

general standard. What's the difference with sliding mesh?

If previously the gears had to be

shifted to get them to engage, in

this constant mesh system all the gears

rotate freely on the main shaft and they are

always meshed with each other. Yes,

simultaneously and at all times. They are

constantly connected, hence the

name constant mash. This completely

changes the rules of the game because the gears

no longer need to bump into each other to get

into position. To make it easier

to imagine, let's compare them

directly. On the one hand we have

sliding meshes which require the

gears to be physically shifted to

mesh. Well, on the other hand, constant mesh

allows the teeth to stick together and stay

connected. Then you might think,

how do you change gears

if the gears keep sticking? Well, instead of

shifting the gear ratio, this smart system

uses a clutch component

attached to the axle to, as it were,

select which gear ratio will be

used to move the car.

This separation of functions between merging and selecting is truly a

super clever leap of engineering thought. If we

look at it from the driver's perspective,

the difference is really noticeable. Sliding mesh

is mechanically efficient, but it has

many practical drawbacks.

The sound is annoyingly loud when shifting

gears. Not to mention the risk of wear and tear

due to Logan's collision. It will be destroyed

in time. Once you switch to

constant, wow, it's a different world. This system is

very efficient, operates much

quieter, and most importantly

gear wear is drastically reduced. This is truly

a major upgrade both in

terms of engine life and

driver comfort. Part four, why is

constant mesh superior? Okay,

let's discuss in more depth why

this constant mesh has become a favorite. Especially

for heavy vehicles and

modern manual transmissions. First, this system uses

helix and double helix gears. The

curved shape of the helix teeth makes

the gears mesh gradually and

very smoothly which automatically makes

the sound much smoother. There's no

more noisy sound. Second, because

the teeth are already attached, we

will no longer damage the ends of the gears

when shifting gears. This automatically

makes it durable. And this is my favorite part

, the security system is top-notch. If

the driver makes a mistake or is late in changing

gears, the damage that occurs is usually

only to the dog clutch,

not to the main gear which is super

expensive and vital. That's a really

brilliant design, isn't it, Aid? But wait,

behind all its greatness, it turns out there is

still one weakness. Constant has

indeed succeeded in eliminating the problem of crash

boxes that damage the teeth, but this system

does not completely pamper the driver. The

sources we discussed noted that

using this type of transmission still requires

extraordinary skills.

Yes, the driver is still forced to

carry out a complicated maneuver called

double declutching, aka pressing the clutch

twice just to shift gears

smoothly. So, in essence, the machine is

much smarter, but the

driver's workload is still quite heavy.

And finally we come to the

fifth part, the upgrade to sync. Well,

here it is, the final evolutionary milestone.

A game changer that finally made

manual cars accessible to the

general public without having to take

god-level driving courses. Meet the Synchromash

gearbox. It was this system that finally

broke the curse of double clutching

forever. Basically, the way

it works is very similar to the Constanton

mesh. His teeth are always connected.

But there is one little addition that is super

revolutionary. They inserted a

cone clutch or corn clutch right

between the dog clutch and the gear.

So what's so great about this corn clutch? He

uses friction to equalize

the speed of the machine components before the

docet comes together. What does it mean? This means that we

as drivers no longer have to worry

about double latching.

This smart mechanical machine

automatically takes over the task of synchronizing the

speed. It's really cool, right? So let's take

another look at the long journey

we've been discussing. We

start from the first era of the

rough and noisy sliding match era where

drivers really had to compete

with the crash box. continued to evolve into the

second era, constant mesh. An

incredible leap of logic by

making the teeth stick together so they

don't break, although it still

requires high skill to use it. Until

finally we arrive at the third era,

Synchromash. This is where the Genius

Conclutch comes in, perfecting everything

and ultimately giving us a

smooth, reliable, and

certainly enjoyable manual driving experience for everyone.

In closing, I want to leave

you with one question. Reflect.

Constant and synchronization technology has been a

huge success in saving

our vehicle's gears and certainly saving

our sanity while driving. But just

imagine for a moment if you were asked

to drive now, do you think you would have the

extraordinary skills that were

needed to conquer a

real crash box in the era of sliding mesh?

This mechanical evolution is not just a

story about increasingly sophisticated metal machines

, but also about how technology

adapts to overcome

our limitations as humans. So, next time

you step on the clutch and

shift the gear lever in

your beloved car, remember the

engineering marvel that lies behind it.

Okay, thank you for joining

our discussion session this time. Stay

curious and see you in

our next exciting discussion.