Can Veeky Forums explain shifting without syncromesh/ double clutching to me...

Can Veeky Forums explain shifting without syncromesh/ double clutching to me. I get the procedure(kinda) but I don't understand why.

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>I get the procedure(kinda) but I don't understand why.

As a Mercedes Mechanic I can field this question.

Shifting is vital to making the car go.

You're welcome.

>extent of mercedes mechanic knowledge

OP here, plz explain. And cars are the things with wheels right?

I have discovered that the rubber spinloops make a funny thup thup noise when you hit them with the breaker bar.

I'll report more as I discover it.

Engine turn one speed, transmission turn another speed.

Clutch engage make engine and transmission turn same speed.

Clutch disengage make engine turn at different speed than transmission.

Blip throttle while clutch make engine speed pick up so that engine and transmission speed match.

Cars may or may not be the things with the wheels. I have heard some of the oddly shaped beings called "advisors" refer to a wheel-less vehicle as a car as well, but I have also heard them refer to them as "Areyoufinishedyet" and "Ijustneedyoutodothisonething".

These "advisors" appear to survive on a diet of badly described customer complaints and self loathing.

I have discovered if you ignore them, they leave and turn into "manager" who then proceeds to get into an argument with "foreman".

"Foreman" seems to be the only one capable of communicating with the "Mechanics" and the "Advisors" appear to fear it.

The reason you double clutch is cos you have no synchros so you have to match clutch and gear speed with the engine speed.

Cars nowadays have synchronous so it does the speed matching for you.

There's a more manual manual, you youngins wouldn't remember. That's a joke i was born when autos where more common than manual, but i was born in a country where automatic wasn't even an idea.

So first you clutch to get out of gear, in this time the fly wheel starts rotating faster than the clutch.
So you drop clutch NOT IN GEAR to allow the fly wheel and clutch to spin at the same speed.
Then you lift clutch put into gear and do as you normally would.

In a synchronized manual, the synchronous use screw like things to match the gear speeds as you put it into gear, meaning you don't grind your gears as they turn at a different rate.

matching the speed of the imput shaft to the output shaft in a transmision

That being said, if you have a higher-mileage car, double-clutching correctly can extend the life of your synchromesh.

This is true as well.

But double clutch improperly and you damage more than just the synchros.

This is why i love manuals, all the responsibility is in my hands.

A more proper way to look at it is input shaft speed and output shaft speed. A clutch is only for beginning from a stop. But a syncromesh transmisison has a clutch on every gear so you can drive like a newb.

OP, buy a bike or drive a big rig, or burn out a syncro and you'll learn. Or use google.

i was syncromeshing my girfriend so hard one time she spit tranny fluid all over my face.

Good times.

>Clutch engage make engine and transmission turn same speed.

Wrong

So that's how it works.

I work as a delivery driver for FedEx and shifting from 2-3 always requires pressing the clutch twice.

>2-3 always requires pressing the clutch twice.
Sounds like some worn synchros.

What vehicle is it? And since I've always wondered, what's the mileage on it?

youtube.com/watch?v=tescWzTlGQ0

OP here, this is a what I needed. I found a vid last night that helped too. Trying to learn how to drive an old mg(no syncros) without hurting the car and looking like an idiot. I'll practice in my car first. Thanks

On this note, if I use the term "Crash gearbox" in America, will people understand what I mean?
Or is this just a British slang term?

Never heard this before mate

Ah. It's a gearbox with no synchromesh, so you need to rev match or double-clutch when you're shifting. Virtually unheard of now, I guess.

Have you ever hopped on a bike?
From 2nd up you don't even need to pull the clutch
You just use the throttle to rapidly change engine speed