Sounds like you've built up some hatred for manuals. Have you driven one? Yes, dual clutch transmissions and sequential gearboxes will shift more quickly, but quick shifts isn't exactly what everyone in the world wants. Also, on low end cars, it's hard to find a good gearbox with paddle shifts. Manual transmissions on low end vehicles are great, and a cheaper option. It's not ideal for racing, but for spirited driving it's a lot of fun.
I just discovered this channel yesterday and man this is freaking awesome. All the car tech its basics explained. Being an automobile enthusiast ive been looking for such a thing since quite a long time. Good Work Bro....Keep that coming.
I would agree that hands-on is a great way of learning. I've spent many days in junkyards tearing things apart to figure out how they work. But these resources are not always available, hence I have videos explaining the basics, so that anyone can learn it.
Same here. 3rd year into a mechanic apprenticeship and i knew the basics as to how all this happened, but this is explained in such a detailed yet simple way it makes it very easy to learn and remember. Definitely two thumbs up from me :)
Manual is fun. I actually paid about $50 extra to have a stickshift instead of automatic when I bought my Saturn back in 2002. Still driving it 11 years later, and it's still a lot of fun to drive. Stick shifters with a clutch pedal are more fun that paddle shifters, in my personal opinion.
Some people don't like driving. If I didn't like driving I would want it to require as little involvement as possible. That's what auto's do. The require little involvement - just steer and press a pedal. No thought required, it's mindless, perfect if you just want to get somewhere and don't care about the journey. That said, plenty of people who enjoy driving drive automatics, to them I say give it a try, you'll be glad you did. Love my 5 speed.
It's simply explained in a way that makes it understandable for everyone. I wouldn't say the basics of automotive engineering are "for dummies." There is likely information you could still learn from my videos.
No, you could have dog collars without synchros. The synchros are on the collar to make a smooth transition between a rotating gear and a rotating shaft.
please remake this video! maybe with some more visual examples. also, it would really help explaining manual 1st (& how it came to be), THEN explain automatic. Also, it would help clear a lot up if you explain how “manual” mode in automatics differs from an actual manual. LOVE your channel.
Yes, you probably have warn synchros. The synchros allow for the gear and the collar to mesh together, but they wear over time. As they wear off, you're basically forcing a collar right into the gear, with no way of matching the speeds, so you simply hear a grinding sound. When you get the RPM close enough, it can still happen, which is what is happening when you rev up to engage the gear.
I'm sorry I love your videos but this one in particular sounds like someone was sleeping in your house so you didn't want to talk too loudly and wake them up. lol
@joeslimon Correct; with the use of synchronizers the moving collar can equate the speed of the non-moving forward gear. Many times, reverse has no synchromesh, so the speeds of the rotating collar and the reverse gear need to be equal (typically not moving).
i know this is a car-oriented channel but I'd love for you to do a video on motorcycle transmissions and how they allow for clutchless shifting if one knows how
You can do it in cars fine (If you do it properly), especially cars with straight gears (only really seen on track orientated cars). Most truck drivers actually shift without the clutch as they have straight gears, they float the clutch because it doubles as a transmission brake (for matching rpm) The main problem with clutchless shifting on cars is that you have synchro/helical gears, which allow for there to be a mismatch in revs and transmission speed as they engage; they don't engage instantly (there is some slip) which means there is wear as they go from not being engaged to being fully engaged to put it plainly. This means synchros are sacrificial, and you will notice older cars/flogged cars will take more effort to shift or require to be rev-matched because the synchros are going out. Now synchros are fine when you use a clutch as it takes away excessive load which wears the gears, they also make shifting easier and quieter, but without a clutch, they tend to wear excessively as they engage unless you match RPMs. With straight cut gears, they won't actually engage unless the RPMs are matched, or they will engage but create a massive clunk as they forcefully engage and match the revs. Lots of truck drives dont use the clutch for shifting either, as they have straight cut gears. They use it more as a transmission brake Since motorbikes have straight cut gears, you do not NEED the clutch, (Its still a good idea to reduce wear) You can simply let off the throttle (unload) and click it up, similar to a truck driver or someone racing a car with a straight cut gearbox (Dogbox/crashbox tranny). Motorbikes also tend to do this quite easily compared to trucks or cars (which sometimes need encouragement) as the gearbox is smaller and lighter. You will notice if you downshift a bike without a clutch without slowing down, you will hear or feel a bang, this is because the revs arent matched and the gears are forcing them to match; so you still have to take care clutchless shifting a bike especially when going down TL;DR the difference between helical gears and straight cut gears allows safe clutchless shifting on a bike (If done right), combined with the fact that motorbikes have light transmissions with less load which makes it even more seamless.
Power losses through the torque converter. Also, with a manual you can choose when to shift so if you know the most efficient shift points you can get better mpg.
With modern fuel injection, the injectors can be shut off if you're in gear and not on the gas; so long as your car continues to move, it won't use fuel as the momentum of the car moving is enough to continue rotating the engine. It's not a dumb question; don't feel silly asking, we're all just trying to learn! :)
Anything and everything can break. Manuals don't have fluid for cooling like the automatics do, and no fluid in the clutch housing if it's a dry clutch. Auto's have fluid for the torque converter and the transmission. I would say manuals tend to seem more robust over time, but in good condition both are pretty reliable.
Instead of a computer telling the transmission when to shift gears, the driver does, with a signal (pushing a button). It can use the same transmission and hardware that's already in an automatic car. That said, it's getting more common, especially in sports cars, to use a dual clutch transmission with the gear selectors.
This is because many times reverse doesn't have a synchro, so it won't match speeds. Make sure your car is completely stopped when switching to reverse, or it's likely you'll hear some grinding.
It just means the gears used are straight rather than helical. It's cheaper, but much louder, hence mainly used in racing where noise isn't a concern. If you have a manual car, typically reverse will be a spur gear (google image spur gear and helical to see the difference) and so it will be loud as you back up. Spur gears also don't have an axial load, as opposed to helical gears. Helical gears have greater surface area though, meaning they can deliver more torque, on top of being quieter.
It's a manual transmission that uses dog engagment. These are basically cogs on a slider (spline) that can engage the gears. It's very similar to what I've explained above.
You sir, can be proud! You are an American who prefers manuals, and from what I have heard Americans tend to like automatics more. And secondly you explain all these things that happen under the bonnet so good that I can actually learn from it. So realy realy thanks for that! I see you don't have a video about syncromesh, maybe that's an idea for next week? :)
Manual, easily, since the driver can choose which gear they would like to be in. That said, there are many types of transmissions. The "best" is difficult to say, but it would definitely allow for selecting the gear the driver would like to be in.
You simply control a program and tell the computer when to switch gears, it can be done with a traditional automatic gearbox, which is usually the case in cheaper vehicles. Can also be done with CVTs, sequentials, and dual clutch transmissions. I have videos on each if you're interested.
The younger the better, they'll be even more comfortable with the material when they're older! I've taught a class on internal combustion engines to 11 year olds before, as long as it's interesting to them, it's worth a shot.
Shouldn't cause any problems, no. Transmissions should be designed this way specifically for emergency purposes as well. If you can't stop accelerating, just pop it in neutral and use the brakes.
Well, for example, you can't simply crawl in traffic with a manual (without slipping the clutch) like you can with an auto, so the first gear may be a bit higher gear ratio. They may also place the gears closer together, since manuals tend to be for more enthusiastic drivers.
Great videos. Just a tip: I think though, that a brief intro of what the part you are about to talk about does would be good, e.g. In this video, we talk about the difference between manual and automatic transmission. *Transmission in a car is what causes the car to... blah blah blah* get the drift? That would make it easy for a layman to understand. I appreciate the effort and time taken to do these videos though :-)
That's not necessarily true. There may be more mechanical losses (through friction) in an automatic, so this may be your answer. As far as racing, manuals are used (or selectable gearboxes) so that the driver can choose the optimal gear to be in. Computers can't do that.
Engineering Explained could you consider a video on full sized truck transmission? I don't mean pick-up truck (like the Raptor you used in explaining awd & 4wd), I mean like an "18-wheeler". I have seen them with 1 stick-shift (with buttons, but also clutch pedal), 2 sticks and also 3 sticks. I can speculate how it works but as I enjoy your videos and you ways of explaining things, I would really like to have YOU do this.
If you're talking about about the "manumatic' type transmissions, it's more like an auto except you flick a paddle and a computer does the work of changing the gear.
You are a genius dude. I have never met a guy that has known that much about cars. I have been watching all of your videos, and I am extremely impressed. I have learned so much about cars because of you! Keep it up man! Did you ever go to college to learn all of this? Or did you learn it all from experience?
@villeneuves2 Actually, working with manual transmissions is typically easier than planetary gearboxes, so the cost is generally cheaper. Manual transmission used to last longer, although now a days it's more dependent on the company you're buying from than the transmission you choose. Replacing the clutch is a big cost if you're an aggressive driver, but automatics generally cost about $1000 extra or so initially over a manual.
I love this channel. If I was you I would make multiple videos explaining how to drive a manual transmission and tips for noobs. Every year thousands of people learn how to drive a manual and go to youtube for information on the subject, could lead to you getting a lot of views. I am looking for information on "lugging" an engine and shifting smoothly
@thehossman1 Lexus and Chrysler also have 8 speeds now, 6+ seems common now, thankfully. Just need to get them on high torque motors now for a major gain in fuel economy.
Hello sir ! Your all videos are very helpful to me .I'm lots of things learn from that . SO , Sir please make a full video on AUTOMATIC TRANSMISSION in details to learn more about it......
You said it.... Manuals are JUST FUN TO DRIVE ! Amen... Love your vids man... you do a great job with simple explanations. How about a vid on Transfer cases in 4X4s... just throwing that out there ! THANKS !
The clutches in the transmission are control by a pressure valve unit and a pump on the input of the transmission. As the input speed of the transmission increases so does the pressure of the pump. When the pressure reaches a 'shift point' it forces a valve open and follows a channel to the next clutch you are dis/en-gaging. This channel changes depending on the position of all other clutches. And sometimes multiple clutches change positions in a given shift.
You can tie into your AT wiring in your car and use a switch to force lock your converter clutch. This will help your AT mpg a good bit, your transmission will do it much slower than necessary, especially under load.
Question for ya Jason, first of all huge fan! I'm studying Mechanical Engineering at Auckland Uni, you are about ten times more efficient and a hundred times more interesting than our lecturers ya legend. Back to the question, lets say the car has been put into neutral, the clutch has been disengaged and in a previous video you said that the disc is spinning freely Now if the output shaft is spinning at the speed of the wheels, how does the car match the revolutions of the outer shaft to that of the input & countershaft when a gear is selected? And is it because of that difference in speeds between shafts that you cant go directly from second to fourth gear say, if your not at a high enough speed?
Manual doesn't necessarily mean operating a clutch. You're referring to an H-pattern synchro mesh system. What modern touring car racing uses is a dog-box with a sequential shifter complimented by a strain-gauge. With that, you can shift up in 0.04 seconds but still heel toe for the downshift. (it still has a clutch, and you can drive it on the street with fast shifts).
Thanks a lot man. I'm learning to drive a manual and I agree its more fun than an auto I would imagine. However i never seem to get the concept of how it works and this helped a bit.
I know this comes across as a silly question, but what would happen if you had a manual box with a torque converter instead of a clutch? would it still work? You come off the gas when you depress the clutch, you could release the gas of a manual and change gear with a torque converter? I know it's a daft question, but would it work? How would it be to drive?
The dog gears are not meant to connect with any applied torque from the engine, as they cannot slip. It might work at first, but the wear rate would be very high.
@tnphysics Automatic gearboxes are simply just more complicated. More precision involved, more pieces that have to be perfect. Fluid pumps, actuators. There's more research that has to go into it. Manual transmissions are far less complex, and can perform the same actions just as well.
You give it gas because you're going to a higher rpm if you downshift. Either you let the transmission shock the engine up to a higher rpm, or you press the gas pedal and get it there without having the shock.
If the engine speed and the transmission speed (which results from the speed of the tires) is the same, then you can shift without using the clutch, because your connecting two things that (relative to eachother) are not moving. Obviously they are moving, but moving together. So if you know at 60 mph your engine is at 2500 rpm in 5th gear, you can rev your engine to 2500 rpm (while going 60) and put it in gear without a clutch. Good practice? Not really, youll grind your gear collars eventually.
I'm very unsure of my future as far as education goes, but I admire your knowledge and ability to explain the workings of cars, as well as your voice, as a result I'm kinda leaning towards a mechanical engineering degree now, but what exactly does mechanical engineering cover? Also did you learn more about cars from college or by yourself?
Umm I wouldn't say "normal" in the sense that it's okay for it to happen, I would still try to avoid it. Once again, just make sure your car is absolutely stopped before switching into reverse.
Interesting. In my experience it seems automatics drop dramatically in RPM when going downhill, thus entering some form of "neutral." When you step back on the gas, the RPM has to rise a certain amount before you begin to accelerate. So it would seem there is no purpose to shift into neutral regardless of the situation (for the purposes of saving fuel).
Can you do a video or just quickly explain how exactly automatic transmission switches gears? Like the physical motions of all the clutches and inner parts that get you from 1st to 2nd etc. and how that occurs? Thanks
Hi. Could you please make a video about seamless shift gearbox? I first heard about it in 2011 when Honda put it in their MotoGP bike. It would be great if you explain the advantages of this system. Thanks a lot for the other videos btw. You're a very straight-to-the-point guy.
could you please make a video show the power band of automatic cars and why revs get lower when transmission changes up gear and how it differs from manual cars
Torque converter is donut shaped and has a little clutch in the center, the converter is 'locked' when the clutch is engaged and makes the engine 1:1 linked to the transmission input. But when the clutch is disengaged the engine rotates at different speeds using the converter. The converter consumes energy so you lock the clutch to increase mpg. But when you go to shift gears you disengaged to clutch so the engine can be one speed and transmission can be another, and slowly they will synchronize
Could you make a video explaining CVTs? I know that a lot of cars are starting to use these such as Nissan and I really would love it if you could explain their operation.
could you do a video just on automatic transmissions explaining exactly how each gear works? I have an extreme interest and knowledge of vehicles, but the one thing i just can't get so far is automatics. I understand the gearset, torque converter and everything, but everything i've watched so far just hasn't explained it in a way i can get everything.... and your videos are great, good explanations although i know most of it already and watch it for interest..thanks...
Hey man, just wanted to extend my thanks for this video. And I thought I was a loser or 'nerd' for having an erasable board in my study room. Best of luck with all your endeavors within engineering.
@MK3504 Certainly. In the US it's rare for anyone to drive manual. And in Europe automatics are starting to become more and more prevalent. It's sad indeed, and I think people who drive manuals actually drive better. It requires you to learn how to drive before you can get on a 45+ mph road, unlike automatics.
Many electric vehicles are geared directly to the tires, the transmission is a single speed, so manual wouldn't really exist. Torque converters aren't needed because electric motors don't stall like IC engines.
I agree with Engeneering explained, perhaps it has to do with shifting style. Use low throttle in first and only give gas when completely locked. And some transmissions need regular fluid replacements, also depending on usage. I always drive Volvo's and an original clutch will last 200.000 km easily, some people even manage to drive 300.000 with one!
yeah thanks man, i wonder if i need to see it actually in front of me in super slow to understand. it's the one major thing about vehicles I cant seem to fully get like i said. and i'd really like to. thanks.
I've been planning on cranking out a video on how the gear selection process works, it will just take some time. It's fairly complicated to explain, so I'll have to sit down and really think it out so that it's easy to understand. But eventually, I will get around to it. Didn't include much on it in this video, since it's lengthy as is.
Why is it that you can't shift back to first gear in manual, but you can with automatics? I read it's about synchronization of gears, but what does that mean?
Sounds like you've built up some hatred for manuals. Have you driven one? Yes, dual clutch transmissions and sequential gearboxes will shift more quickly, but quick shifts isn't exactly what everyone in the world wants. Also, on low end cars, it's hard to find a good gearbox with paddle shifts. Manual transmissions on low end vehicles are great, and a cheaper option. It's not ideal for racing, but for spirited driving it's a lot of fun.
I just discovered this channel yesterday and man this is freaking awesome. All the car tech its basics explained. Being an automobile enthusiast ive been looking for such a thing since quite a long time. Good Work Bro....Keep that coming.
I would agree that hands-on is a great way of learning. I've spent many days in junkyards tearing things apart to figure out how they work. But these resources are not always available, hence I have videos explaining the basics, so that anyone can learn it.
Same here. 3rd year into a mechanic apprenticeship and i knew the basics as to how all this happened, but this is explained in such a detailed yet simple way it makes it very easy to learn and remember.
Definitely two thumbs up from me :)
Manual is fun. I actually paid about $50 extra to have a stickshift instead of automatic when I bought my Saturn back in 2002. Still driving it 11 years later, and it's still a lot of fun to drive. Stick shifters with a clutch pedal are more fun that paddle shifters, in my personal opinion.
Some people don't like driving. If I didn't like driving I would want it to require as little involvement as possible. That's what auto's do. The require little involvement - just steer and press a pedal. No thought required, it's mindless, perfect if you just want to get somewhere and don't care about the journey.
That said, plenty of people who enjoy driving drive automatics, to them I say give it a try, you'll be glad you did. Love my 5 speed.
It's simply explained in a way that makes it understandable for everyone. I wouldn't say the basics of automotive engineering are "for dummies." There is likely information you could still learn from my videos.
No, you could have dog collars without synchros. The synchros are on the collar to make a smooth transition between a rotating gear and a rotating shaft.
please remake this video! maybe with some more visual examples. also, it would really help explaining manual 1st (& how it came to be), THEN explain automatic.
Also, it would help clear a lot up if you explain how “manual” mode in automatics differs from an actual manual.
LOVE your channel.
Haven't been quite that fast in my Integra, but close, and that was quite some time ago. I wish you the utmost self control!
Always crazy to think someone - or rather many different people - designed all of the components that make up machines that can drive.
Yes, you probably have warn synchros. The synchros allow for the gear and the collar to mesh together, but they wear over time. As they wear off, you're basically forcing a collar right into the gear, with no way of matching the speeds, so you simply hear a grinding sound. When you get the RPM close enough, it can still happen, which is what is happening when you rev up to engage the gear.
I'm sorry I love your videos but this one in particular sounds like someone was sleeping in your house so you didn't want to talk too loudly and wake them up. lol
@joeslimon Correct; with the use of synchronizers the moving collar can equate the speed of the non-moving forward gear. Many times, reverse has no synchromesh, so the speeds of the rotating collar and the reverse gear need to be equal (typically not moving).
i know this is a car-oriented channel but I'd love for you to do a video on motorcycle transmissions and how they allow for clutchless shifting if one knows how
You can do it in cars fine (If you do it properly), especially cars with straight gears (only really seen on track orientated cars).
Most truck drivers actually shift without the clutch as they have straight gears, they float the clutch because it doubles as a transmission brake (for matching rpm)
The main problem with clutchless shifting on cars is that you have synchro/helical gears, which allow for there to be a mismatch in revs and transmission speed as they engage; they don't engage instantly (there is some slip) which means there is wear as they go from not being engaged to being fully engaged to put it plainly.
This means synchros are sacrificial, and you will notice older cars/flogged cars will take more effort to shift or require to be rev-matched because the synchros are going out.
Now synchros are fine when you use a clutch as it takes away excessive load which wears the gears, they also make shifting easier and quieter, but without a clutch, they tend to wear excessively as they engage unless you match RPMs.
With straight cut gears, they won't actually engage unless the RPMs are matched, or they will engage but create a massive clunk as they forcefully engage and match the revs.
Lots of truck drives dont use the clutch for shifting either, as they have straight cut gears. They use it more as a transmission brake
Since motorbikes have straight cut gears, you do not NEED the clutch, (Its still a good idea to reduce wear)
You can simply let off the throttle (unload) and click it up, similar to a truck driver or someone racing a car with a straight cut gearbox (Dogbox/crashbox tranny).
Motorbikes also tend to do this quite easily compared to trucks or cars (which sometimes need encouragement) as the gearbox is smaller and lighter.
You will notice if you downshift a bike without a clutch without slowing down, you will hear or feel a bang, this is because the revs arent matched and the gears are forcing them to match; so you still have to take care clutchless shifting a bike especially when going down
TL;DR the difference between helical gears and straight cut gears allows safe clutchless shifting on a bike (If done right), combined with the fact that motorbikes have light transmissions with less load which makes it even more seamless.
Power losses through the torque converter. Also, with a manual you can choose when to shift so if you know the most efficient shift points you can get better mpg.
By direct are you saying 1:1 gear ratio? Depends on what the manufacturer wants to do. Yes, there are 4 speed manuals and 6 speed autos.
Thanks for these lessons about clutch, clutch disc etc..
I've learned a lot ! Thank you very mutch, you are a good teacher !
You're welcome, thanks for watching!
The purpose of gears is equal in both styles of transmissions. Autos use lower gears at lower speeds, just like you would with a manual.
you are better than many lecturers that teaches these stuff. "Mr. mechanical prodigy"
With modern fuel injection, the injectors can be shut off if you're in gear and not on the gas; so long as your car continues to move, it won't use fuel as the momentum of the car moving is enough to continue rotating the engine. It's not a dumb question; don't feel silly asking, we're all just trying to learn! :)
Wow, you are better at explaining than all my lecturers. Thanks so much
Anything and everything can break. Manuals don't have fluid for cooling like the automatics do, and no fluid in the clutch housing if it's a dry clutch. Auto's have fluid for the torque converter and the transmission. I would say manuals tend to seem more robust over time, but in good condition both are pretty reliable.
Instead of a computer telling the transmission when to shift gears, the driver does, with a signal (pushing a button). It can use the same transmission and hardware that's already in an automatic car. That said, it's getting more common, especially in sports cars, to use a dual clutch transmission with the gear selectors.
Great videos, appreciate you taking time to make them.
Thanks for watching!
j i totally agreec these videos are great, and help a lot with understanding how many different parts work. thanks man!
@@EngineeringExplained if we really don't know too much about how the mechanics work is there a video before this that you recommend watching?
This is because many times reverse doesn't have a synchro, so it won't match speeds. Make sure your car is completely stopped when switching to reverse, or it's likely you'll hear some grinding.
Yep, spur gears are much louder, and reverse is typically a straight cut gear.
It just means the gears used are straight rather than helical. It's cheaper, but much louder, hence mainly used in racing where noise isn't a concern. If you have a manual car, typically reverse will be a spur gear (google image spur gear and helical to see the difference) and so it will be loud as you back up. Spur gears also don't have an axial load, as opposed to helical gears. Helical gears have greater surface area though, meaning they can deliver more torque, on top of being quieter.
Thanks man. Very happy to talk to someone as cool as you sir. Stay well and have fun!
well said. a survey in western europe prooved that driving with manual trans increases the risk of accidents in comparaison with auto transm
It's a manual transmission that uses dog engagment. These are basically cogs on a slider (spline) that can engage the gears. It's very similar to what I've explained above.
You sir, can be proud! You are an American who prefers manuals, and from what I have heard Americans tend to like automatics more. And secondly you explain all these things that happen under the bonnet so good that I can actually learn from it. So realy realy thanks for that! I see you don't have a video about syncromesh, maybe that's an idea for next week? :)
Manual, easily, since the driver can choose which gear they would like to be in. That said, there are many types of transmissions. The "best" is difficult to say, but it would definitely allow for selecting the gear the driver would like to be in.
You simply control a program and tell the computer when to switch gears, it can be done with a traditional automatic gearbox, which is usually the case in cheaper vehicles. Can also be done with CVTs, sequentials, and dual clutch transmissions. I have videos on each if you're interested.
The younger the better, they'll be even more comfortable with the material when they're older! I've taught a class on internal combustion engines to 11 year olds before, as long as it's interesting to them, it's worth a shot.
Shouldn't cause any problems, no. Transmissions should be designed this way specifically for emergency purposes as well. If you can't stop accelerating, just pop it in neutral and use the brakes.
Yay now I know why the car makes these weird grinding sounds whenever you change speed. Thanks!:)
It's the third pedal, the one all the way on the left, in a manual transmission car.
not sure how i ended up here... but this guy wins. 8 minutes well spent :)
Yes, it's quite complex and I had hoped to get around to it eventually.
Well, for example, you can't simply crawl in traffic with a manual (without slipping the clutch) like you can with an auto, so the first gear may be a bit higher gear ratio. They may also place the gears closer together, since manuals tend to be for more enthusiastic drivers.
It would require a video, as I couldn't describe it well with words. It's rather complex, but I do hope to get around to this eventually.
Wow, this was exactly what I wanted to know in great detail. I will be viewing more of your videos in the futurr
Great videos.
Just a tip: I think though, that a brief intro of what the part you are about to talk about does would be good, e.g. In this video, we talk about the difference between manual and automatic transmission. *Transmission in a car is what causes the car to... blah blah blah* get the drift? That would make it easy for a layman to understand. I appreciate the effort and time taken to do these videos though :-)
hey great video really helped me understand how an automatic transmission works or the whole planetary gear system.
If there is less friction, then yes. But also the GTR is AWD so it will likely have more losses than most 2WD vehicles.
Yes, clutches are still used in automatics.
Yeah, what I'm saying is it more than likely works like an automatic, using a torque converter still rather than a clutch for the "manual" shifting.
That is true, I never said dual clutch gearboxes had torque converters. Most racing transmissions are electronically controlled you are correct.
That's not necessarily true. There may be more mechanical losses (through friction) in an automatic, so this may be your answer. As far as racing, manuals are used (or selectable gearboxes) so that the driver can choose the optimal gear to be in. Computers can't do that.
Engineering Explained could you consider a video on full sized truck transmission? I don't mean pick-up truck (like the Raptor you used in explaining awd & 4wd), I mean like an "18-wheeler". I have seen them with 1 stick-shift (with buttons, but also clutch pedal), 2 sticks and also 3 sticks. I can speculate how it works but as I enjoy your videos and you ways of explaining things, I would really like to have YOU do this.
If you're talking about about the "manumatic' type transmissions, it's more like an auto except you flick a paddle and a computer does the work of changing the gear.
it would be great if u make a video on automatic trans alone.....
u r a great teacher... thnx fr teaching us!!!
You are a genius dude. I have never met a guy that has known that much about cars. I have been watching all of your videos, and I am extremely impressed. I have learned so much about cars because of you! Keep it up man! Did you ever go to college to learn all of this? Or did you learn it all from experience?
@villeneuves2 Actually, working with manual transmissions is typically easier than planetary gearboxes, so the cost is generally cheaper. Manual transmission used to last longer, although now a days it's more dependent on the company you're buying from than the transmission you choose. Replacing the clutch is a big cost if you're an aggressive driver, but automatics generally cost about $1000 extra or so initially over a manual.
I love this channel. If I was you I would make multiple videos explaining how to drive a manual transmission and tips for noobs. Every year thousands of people learn how to drive a manual and go to youtube for information on the subject, could lead to you getting a lot of views. I am looking for information on "lugging" an engine and shifting smoothly
1st and 2nd gear; sometimes useful for example when going down a long decent (mountain road) and you don't want to overheat the brakes.
@thehossman1 Lexus and Chrysler also have 8 speeds now, 6+ seems common now, thankfully. Just need to get them on high torque motors now for a major gain in fuel economy.
Skyactiv, yes great stuff. I can't say which is ultimately better, but manual is way more fun so that's what I'd go with.
Yes, the autos typically have a better rating, but real world it's possible to do better with the manual. The average driver may see no difference.
Hello sir !
Your all videos are very helpful to me .I'm lots of things learn from that .
SO , Sir please make a full video on AUTOMATIC TRANSMISSION in details to learn more about it......
What a blast from the past! Love the channel
You said it.... Manuals are JUST FUN TO DRIVE ! Amen... Love your vids man... you do a great job with simple explanations. How about a vid on Transfer cases in 4X4s... just throwing that out there ! THANKS !
The clutches in the transmission are control by a pressure valve unit and a pump on the input of the transmission. As the input speed of the transmission increases so does the pressure of the pump. When the pressure reaches a 'shift point' it forces a valve open and follows a channel to the next clutch you are dis/en-gaging. This channel changes depending on the position of all other clutches. And sometimes multiple clutches change positions in a given shift.
Great explanation of the automatic with the planets
You can tie into your AT wiring in your car and use a switch to force lock your converter clutch. This will help your AT mpg a good bit, your transmission will do it much slower than necessary, especially under load.
Question for ya Jason, first of all huge fan!
I'm studying Mechanical Engineering at Auckland Uni, you are about ten times more efficient and a hundred times more interesting than our lecturers ya legend.
Back to the question, lets say the car has been put into neutral, the clutch has been disengaged and in a previous video you said that the disc is spinning freely
Now if the output shaft is spinning at the speed of the wheels, how does the car match the revolutions of the outer shaft to that of the input & countershaft when a gear is selected?
And is it because of that difference in speeds between shafts that you cant go directly from second to fourth gear say, if your not at a high enough speed?
see his video on clutch plates. u will understand.
Manual doesn't necessarily mean operating a clutch. You're referring to an H-pattern synchro mesh system.
What modern touring car racing uses is a dog-box with a sequential shifter complimented by a strain-gauge.
With that, you can shift up in 0.04 seconds but still heel toe for the downshift. (it still has a clutch, and you can drive it on the street with fast shifts).
Thanks a lot man. I'm learning to drive a manual and I agree its more fun than an auto I would imagine. However i never seem to get the concept of how it works and this helped a bit.
I know this comes across as a silly question, but what would happen if you had a manual box with a torque converter instead of a clutch? would it still work? You come off the gas when you depress the clutch, you could release the gas of a manual and change gear with a torque converter? I know it's a daft question, but would it work? How would it be to drive?
The dog gears are not meant to connect with any applied torque from the engine, as they cannot slip. It might work at first, but the wear rate would be very high.
@tnphysics Automatic gearboxes are simply just more complicated. More precision involved, more pieces that have to be perfect. Fluid pumps, actuators. There's more research that has to go into it. Manual transmissions are far less complex, and can perform the same actions just as well.
You give it gas because you're going to a higher rpm if you downshift. Either you let the transmission shock the engine up to a higher rpm, or you press the gas pedal and get it there without having the shock.
If the engine speed and the transmission speed (which results from the speed of the tires) is the same, then you can shift without using the clutch, because your connecting two things that (relative to eachother) are not moving. Obviously they are moving, but moving together. So if you know at 60 mph your engine is at 2500 rpm in 5th gear, you can rev your engine to 2500 rpm (while going 60) and put it in gear without a clutch. Good practice? Not really, youll grind your gear collars eventually.
I'm very unsure of my future as far as education goes, but I admire your knowledge and ability to explain the workings of cars, as well as your voice, as a result I'm kinda leaning towards a mechanical engineering degree now, but what exactly does mechanical engineering cover? Also did you learn more about cars from college or by yourself?
Could you explain how the Tiptronic works?
Umm I wouldn't say "normal" in the sense that it's okay for it to happen, I would still try to avoid it. Once again, just make sure your car is absolutely stopped before switching into reverse.
Interesting question, perhaps so. Or it disconnects at low enough speeds.
Interesting. In my experience it seems automatics drop dramatically in RPM when going downhill, thus entering some form of "neutral." When you step back on the gas, the RPM has to rise a certain amount before you begin to accelerate. So it would seem there is no purpose to shift into neutral regardless of the situation (for the purposes of saving fuel).
Can you do a video or just quickly explain how exactly automatic transmission switches gears? Like the physical motions of all the clutches and inner parts that get you from 1st to 2nd etc. and how that occurs? Thanks
Hi. Could you please make a video about seamless shift gearbox?
I first heard about it in 2011 when Honda put it in their MotoGP bike.
It would be great if you explain the advantages of this system.
Thanks a lot for the other videos btw.
You're a very straight-to-the-point guy.
could you please make a video show the power band of automatic cars and why revs get lower when transmission changes up gear and how it differs from manual cars
Torque converter is donut shaped and has a little clutch in the center, the converter is 'locked' when the clutch is engaged and makes the engine 1:1 linked to the transmission input. But when the clutch is disengaged the engine rotates at different speeds using the converter. The converter consumes energy so you lock the clutch to increase mpg. But when you go to shift gears you disengaged to clutch so the engine can be one speed and transmission can be another, and slowly they will synchronize
Glad you found it!
Could you make a video explaining CVTs? I know that a lot of cars are starting to use these such as Nissan and I really would love it if you could explain their operation.
Can you show how the shift linkage on a transversely mounted front engined front wheel drive car works please
could you do a video just on automatic transmissions explaining exactly how each gear works? I have an extreme interest and knowledge of vehicles, but the one thing i just can't get so far is automatics. I understand the gearset, torque converter and everything, but everything i've watched so far just hasn't explained it in a way i can get everything....
and your videos are great, good explanations although i know most of it already and watch it for interest..thanks...
you should a video on shifting between lower gear and drive while the car's moving
Hey man, just wanted to extend my thanks for this video. And I thought I was a loser or 'nerd' for having an erasable board in my study room. Best of luck with all your endeavors within engineering.
Yes, that is a main advantage.
Depends on your driving habits. I'd say a manual has a greater potential for better fuel economy.
Extremely thorough explanation! Easily understood. Thanks!
@MK3504 Certainly. In the US it's rare for anyone to drive manual. And in Europe automatics are starting to become more and more prevalent. It's sad indeed, and I think people who drive manuals actually drive better. It requires you to learn how to drive before you can get on a 45+ mph road, unlike automatics.
Many electric vehicles are geared directly to the tires, the transmission is a single speed, so manual wouldn't really exist. Torque converters aren't needed because electric motors don't stall like IC engines.
Can you explain about straight cut gears and helical gears? What the pros and cons about it?
I agree with Engeneering explained, perhaps it has to do with shifting style. Use low throttle in first and only give gas when completely locked. And some transmissions need regular fluid replacements, also depending on usage. I always drive Volvo's and an original clutch will last 200.000 km easily, some people even manage to drive 300.000 with one!
yeah thanks man, i wonder if i need to see it actually in front of me in super slow to understand. it's the one major thing about vehicles I cant seem to fully get like i said. and i'd really like to. thanks.
Bad transmissions, there's a system of clutches and belts in there; could be electrical as well. Have it checked out.
I've been planning on cranking out a video on how the gear selection process works, it will just take some time. It's fairly complicated to explain, so I'll have to sit down and really think it out so that it's easy to understand. But eventually, I will get around to it. Didn't include much on it in this video, since it's lengthy as is.
Why is it that you can't shift back to first gear in manual, but you can with automatics? I read it's about synchronization of gears, but what does that mean?
Good video but you forgot about the synchronizes that's why when rolling forward & you put you manual trans in reverse you get the clash