Dual Clutch Transmission - How it Works 

one piece at a time

lol.

I know what you mean. I still had trouble completely understanding this. I guess I need to be more smarter because me dont does it very well.

Standing on the shoulders of giants. How many people make it real?

The basic design has been around for a very long time in "standard" or "manual" transmissions. They just put two clutches and two gear sets in parallel to allow it to shift odd-even-odd-even and used a computer to control the clutch engagement and shifting.

Yea no kidding. I'm 15 trying to understand this and most of it kinda flys over my head. Crazy how people came up with this stuff.

that's gonna be hard to do.

Cheaper than a traditional automatic

+daave3 a little more

you most of the times "can't" fuck it up, but they are more likely to break by their own, like other automcatic transmissions. Also like a poorly handled manual

José Luís Lopes If your auto transmission been breaking you must be dealing with a shit car. I've only had 2 auto's crap out on me. I had a nearly stock 540i that was just a polished overpriced shit. I still bought a manual one right after though. The other was my el camino with a th350, but that's cause I was running around 900hp on the stock transmission and I blew up the motor at the same time. And the transmission on my el camino was still salvageable.

4 times the trouble?

but u still have 3 pedals? or no?

No

Exactly!!! The end

Uhh, kind of. It's easier to think of it like a motorcycle transmission with hydraulically actuated shift forks driven directly off the crankshaft rather than via chain.

Yup. In a manual, to switch gears you have to disengage, and then reengage with a higher gear ratio. So during shifting your car essentially has to go a through a neutral gear phase, where no gears are meshing. In a dual clutch, you don't go through that period. Two gears are always in mesh, just a matter of releasing the clutch.

@@rohanahmed3088 Actually the gears are always meshed with each other. It's the synchros which lock and unlock the gears to the shafts.

@@joevarga5982 Yeah that's what i meant to say. By mesh i meant to say shafts are rotating at same speeds, i was not referring to gear tooth contact. pardon my incorrect terminology.

@@rohanahmed3088 Huh? The shafts are rotating at different speeds due to the gear ratio selected.

​@@joevarga5982 I think he meant to say the shafts are rotating at different speeds. He actually totally knows what he's talking about; please forgive him for using incorrect terminology.

xD

😂😂😂 priceless.

Becouse you are mister indians

I*

Clown

Hells bells 🔔

God is fictional.

Yeh this is the type of gearbox used in a lot of race cars apparently. Yes there are a lot of parts that can mess up but because they are basically manual gearboxes they are really strong and can take the punishment. No teflon bands to go old, brittle, slip and fail as per a standard automatic gearbox. Because they are complicated to operate they are not operated with manual clutches. Modern cars have the computers change the gears for you. There will be no clutch in your car to push.

@@darylleaf2081 not just race cars. They are in lots of car nowadays My 2013 c class has DCT and a 20 year old Audi will have DCTs as well and that’s just 2 easiest examples

@@Vlad-fe8pv and lots of problems from computer programming errors to seized input shafts clutch failures. Anything automated is going to have problems. This is just another crutch for the lazy that dont want to learn to drive properly. Everyone should have to start driving on a manuel transmission. Once that is mastered they can drive anything

@@holmes1956O I have a kona n with the DCT and also hundreds of hours of track time and you can not shift as fast with a manual--also most DCTs are also almost half a second quicker in the quarter mile as opposed to manuals--even the new manuals that have super quick rev shifting like the new blackwing caddies--the auto version is faster.I have also owned many manula cars and sadly they will be going away in the next generation or 2.

@@khronin just exactly where did my post say anything about the speed of the shifting. You self proclaimed specialsts are nothing more than professional braggers. Legends in your own minds. 😂😂😂😂😂😂😂😂

What’s cool is Ford put out a recall they replaced the clutch on my 2015 focus for free my focus made it to 117k miles until I took it to get that clutch replaced there was nothing wrong with it it still shifted good but i heard that recall was ending soon for the 2015 focuses

"Marvelous for the safety of users" how so? I can't see the safety aspects of it being any different than that of a normal trans with a torque converter.

Lol ya show them a 5&4 and check the look on their face

How do you say all this in english..

@@nicholasnjela5217 I don't know, but 5 people apparently understood what he was saying.

Mrecadies 😂

What is a trans car? A transgender car?

Possible when you as a student at mechanical engineering program.

Or It could be that you need a better mechanical comprehension of transmissions, I'm drunk whilst writing this & watching the video, I found it rather easy to comprehend (That means understand).

I'm a girl and even I can understand this video. Not quite sure how much more simple it could possibly be. o_O

@@MissNebulosity Thank you

@Charlie D you're* 🙃🙃🙃

lol

Lol same

This video is litarally how it works. Very hard to take any learning from this piece of shit. Dual clutch on 4 minutes.. there is no way lmao.

Still confused in 2020

@@sepehr7402 Still confused in 2021

yea, because it a special design for squidward 🙏🏻😌✌️

you picked the right transmission

No, your engine oil isn't used for your clutch. Check the owner's manual or the service manual, you'll have instructions on what kind of oil is used where. Odds are you won't need to deal with clutch oil per se. You'll change the gear box oil (and implicitly the clutch oil) as per manufacturer recommendations since the wet clutch of VAG DSG's share their oil with the rest of the transmission.

Just try renewing fluid and filter, and throw in a bottle of Lucas transmission fix and see how you go. Also try cleaning off the body earth from your nagative battery terminal, clean both terminals on the battery.. .coz why not? There are also earthing points on the transmission to the vehicle body, clean those too. Good luck You can also try resetting the transmission Calibration, through a scantool or by disconnecting batt terminals, turning on headlights for several minutes then touching battery terminals together. Refit everything. Two days of driving around should sort out the idle and gearbox algorithm for your usage pattern at that point.

China

We have the same understanding. I think its right. Dual clutch also means 2 sets of transmissions, 1 dor odd gears and 1 for even gears working together resulting to smooth gear changes.

What about the durability of the dry clutch. I heard that the DCT from Kia and Hyundai is shitty.

if your throttle input is over 80% then it will shift up to 2nd, or if your throttle input is over 60% but your engine load is already over 50% then it will shift up to 2nd

PayPal

By "step motors" controlled by the TCM.

Same way when speed decreases it anticipate for lower gear shif its all computer sensors

Depending on wether the DSG has dry clutch packs or wet clutch packs. The transmission disengages Drive (when in D at a stop) to stop the packs from getting too hot and increasing the wear. They do this by disengaging the clutch packs and putting on the brakes (even though the car is still in Drive). This is exactly the same principle as a Manual and you pressing in the clutch and putting it in Neutral at a red light (or holding the clutch in) to stop increased wear on the clutch. This means in a DSG, you don't have to change the car from D > N when you have stopped, because it's already done it for you! Hope this helps.

Hi Jason, Tks for your comment. If you read the DSG service manual, you will see other recomendations for this situation. Please, see below: "N" position of the floor-mounted shift lever means that the transmission is in"neutral". Similar to P above, both clutch packs and all gear-sets are fully disengaged, however the parking lock is disengaged. This position should be used when the motor vehicle is stationary for a period of time, such as atred traffic lights,or waiting in a queue of stationary traffic. The DSG should not be held in any of the active gear modes while stationary using the footbrake for other than brief periods - due to the clutches being held on the bite point, as this can overheat the clutches andtransmission fluid. This position also allows the engine to be restarted (in some cars needing thekey to be partially disengaged) which cannot be done in any of the active modes Source: pt.scribd.com/doc/134353573/Report-DSG#scribd .... Pag 27/37 So, Who is correct? I'm still not confortable with keep the clutch engaged when I stop in red light. I would you like to find others technical sources about the correct procedures of DSG. If you have theses sources, please let me know here or by email. Regards

Marcelo bhering It depends on the manufacturer as well. I have a Mitsubishi with a dual clutch transmission. The way this one works is when the vehicle stops, such as a red light, the clutches lose hydraulic pressure, therefore disengage. As soon as you let off the brake it slowly put pressure back on, engaging the clutches. I put my vehicle in "N" anyway but just out of laziness lol.

Valid question on disengaging auto gear transmission while waiting at traffic signals. Is it recomended to shift to Neutral position and hold the brake while the car is idling at signal intersections?

Nicht verstehen sie!

I will always prefer manual over automatics because I love the feeling of shifting the gears with a stick :) it connects me more with the vehicle and driving

I have the 2015 focus with this transmission it now has 117k an I have had no problems with it so far I love it

@@Michael-uo4jj your explanation on DCT lacks clarity please.

"In theory" ... the DCT gives you more robust friction surfaces (clutches) through which engine power is transmitted, along with solid gears. A CVT has a kind of squishy system with limited surface contact area for the power to get from input side of transmission to output side. Early versions couldn't handle the power of cars and they are still usually found only in lower power vehicles.

They all suck. Get a normal torque converter auto and change the fluid and filter every 2 years/40k km.

@@DoubtingThomas333 lmao hell no ever heard of the pdk or the dct Hyundai made now? They are insanely good

@@Mr.Thermistor7228 they don't hold up, and they aren't meant to tow anything. On top of that nobody will or knows how to rebuild them, they're replacement units only. There's even a heap of proprietary configuration and tuning software, not to mention tooling to be able to even deal with these transmissions. A normal manual or torque converter auto on the other hand is much much easier to rebuild and repair. Also I changed my opinion, I'd be replacing the fluid in any transmission every 20k km. Fluid is cheap, transmissions are expensive.

Different purposes. Technically speaking CVT is the best transmission we can have, cause you can put any gear ratio you want from mininum to max (1st to 7th). Even a g.r betwen 2nd-3rd or 6th-7th for example. It means theorically the gear is always in the best ratio to the condition of your driving. BUT ...we lack from technology: CVT is the best to get the lower fuel consumption, but we could not develop it to be also good at sporty conditions (quick reaction) or to fit powerful engines. All of this itens that CVT do not fit well, the DCT accomplishes perfectly, in general.

Regular automatics are everywhere, GM, Ford, Dodge, they all use them, and BMW is going back to regular automatics, the ZF8speed is in the BMW M5. More reliable.

They say that the Malibu will be a CVt Also not a lot of front drive sedan american cars will stsu in production I cannot afford a BMW

Dct for sure, ctv has a dry clutch and the belt wears

Yep. And then hydraulic pressure just switches from one clutch to the other, hence why it can shift so fast.

it's 10 gears and it isn't a dual clutch lol

Depends on how you shift the manual

In Australia they are a 6 speed manual trans, how does your comment pertain to this video?

you can't, it can only go one gear at a time

Aidan Panter Wrong! I go skip multiple gears on my car using the shift paddles all the time on my Acura

depends on your car setup , it can shut down engine or even bend crank shaft mostly if a flywheel is too light

@@maxmx767 That's not skipping gears, your transmission is still cycling through each gear. OP didn't realize that DCT's don't have three pedals and was thinking of shifting from 5th to 2nd as you would in a traditional manual.

@@enemyspotted2467 Now you being extremely literal my friend. Of course the DCT cycle around gears but the reasoning of the question is the transmission will encounter any problems if the driver downshift 2 or 3 gears And the answer is no, I’ve downshifted from 8th to 5th sometimes to 4th and that Acura transmission works flawlessly

I'd say that amazed me.