How an Automatic Transmission Works (Allison 1000)

[@РэйЧехов]

I was watching a f.ing bunch of videos to understand the automatic gearbox, and only yours is worked. Good job

[@interlinkknight]

Yeah, same happen to me. I watch so many videos and none was detailed enough to really understand how everything works. Was only after I finish the animation that I trully understood. Is nice to see that i helped. Cheers.

[@kylandaminick13]

agreed

[@asadsiddiqui5004]

Awesome!!! Learned sooo much about them... thanks buddy...

[@dowskivisionmagicaloracle8593]

I don't understand how the sun gear turns faster on P2 for gear 6 than it does for gear 5. Are you sure you got this right? Or should the configuration for gears 5 and 6 be switched?

[@voidisyinyangvoidisyinyang885]

@@dowskivisionmagicaloracle8593 maybe cuz the torque converter is locked?

[@witzed1]

Thanks for this explanation. I do think that it's not the planetary gearing that is difficult to understand but how hydraulic pressure is used to control the clutches and how this interacts with the planetary gear system. The structure of the clutch packs is also complex and worthy of a model.

[@Deceptive24]

This is one of the best most simplified animations on KZbin!! You deserve more views! Still very very challenging to understand as you have to imagine multiple things working all together in a 3D multi-layed synergy. Its fascinating.

[@interlinkknight]

:) thanks

[@abot4694]

This is by far one of if not the best explanation for understanding Automatic transmissions. Thank you!

[@nathandevito1179]

I love this. I have been trying to understand automatic transmissions for a while and this finally made it click.

[@토미네이터]

one of the best explanation about Automatic Transmission! thanks!

[@interlinkknight]

You're welcome

[@francaishaitam6708]

bro , you just make way easier , this the best explanation ever

[@evanparshall1323]

Definitely the best video on automatic transmissions online. The first that really helped me understand!

[@76MARD]

By far the best explanation I found regarding automatic transmission, but I think I need to watch a few more time to grasp it. Thanks

[@ahmedzaki4861]

Best animation and illustration seen till now for explaining automatic transmission. You know, it will be even better if you show the same animation while taking a quarter section to show the ring gear movement before showing each section alone. It will make it more understandable. Appreciate your great effort in this video. 👏

[@Wingedmechanic]

Well somebody put a lot of effort and I must say, it didn't go waste even a bit!. Cheers.

[@seanbeankim9005]

Unbelievably comprehensive video of all! You are such a genius!

[@karloblagonic1352]

No thenkuy

[@freydomgod7112]

This is bt far the best explanation of of the automatic transmission in youtube

[@zahimiibrahim3602]

Thank you, very well presented. Ever since I had to have my auto transmission rebuilt I've been trying to understand how it works and this has been very useful. Manual transmissions are quite easy for a layman like me to understand but autos are more complex to get my head around.

[@jorgegonzalez9155]

Brillian explanation for the inner working of a transmition,what a tutorial, master teacher, many people who repair a transmition are barely part changers, only a few know how is working and how the ratios are obtained.

[@bri961]

Compared to other video, this video made me understand better on how automatic transmission works

[@NewStarConstellation]

Thank you, this was really helpful. I finally understood how automatic drive with planetary gearing works! THANK YOU!

[@Psylent]

Thanks for this. You were much more clear than that other automatic transmission video that has over a million views. I'll need to watch it again a few times. I also have a few webpages open that explain the math of planetary gears.

[@interlinkknight]

+Soylant I am happy you find it helpful. I agree that there are many videos explaining how automatic transmission works, but they all skip the part on how all those gears actually create all those ratios (power-flow). I didn't go about the math of planetary gears because I didn't want to be too confusing, when already kinda is. Good luck

[@FrostMonolith]

That really explains everything! Now I need to know how these machines engage each of the clutches *on its own*

[@interlinkknight]

a computer with sensors

[@FrostMonolith]

***** i read an article at HowStuffWorks. Yes, there are electrical sensors and it's common now. Before they exist, they have a mechanical air-pressure detecting system to detect if the engine works so hard, and detects which clutch gear is hold. If the certain pressure is reached, a valve opens automatically to pump air to make the clutch work, just like how you manually use brakes. Wow I learnt so much starting from this video!

[@interlinkknight]

+FrostMonolith internet is awesome :)

[@CS-xc3xk]

best combination of visuals and explanation by far. going to rewatch a few videos showing a more realistic transmission now with a much better understanding and get the best of all worlds. cheers mate

[@interlinkknight]

I'm glad it could be useful for you :)

[@benilaecraig6681]

You make engineering look simple. Well done

[@iguanapete3809]

Absolutely best demo I have seen so far...

[@interlinkknight]

Wow. Thanks.

[@roobear5357]

Excellent overview of the basic mechanics of an automatic transmission... Thanks

[@screweduptx512]

Wow this helped. Been wondering how it worked more or less. Have been watching videos that are too confusing. But this was great. Thanks

[@thirdjaruda4202]

after like a dozen videos about automatic transmission, FINALY I GET IT! THANK YOU! you got a like and a new subscriber!

[@aditya-br3kg]

I understand more with animation like this than others, thank you so much

[@agusrhermanto]

Awesome.. detail explanation with 3D drawing, very helpful. Thanks.

[@dowskivisionmagicaloracle8593]

I don't understand how the sun gear turns faster on P2 for gear 6 than it does for gear 5. Are you sure you got this right? Or should the configuration for gears 5 and 6 be switched?

[@2prophets541]

Very Well put together. The illustration was very educational, and Interesting. I enjoyed it, and I learned something I never knew before.

[@interlinkknight]

I am glad i could help. Cheers

[@akbarshoed]

Thank you for making this video. It simply is not making helping people understand.

[@salahdehina9733]

What kind of genius can come up with all of this? The Buick Roadmaster was the first ever car to have an automatic transmission right? That was in the '40s, really impressive.

[@edsteratom8864]

Best video I could find on automatic transmission. Keep it up

[@VauxhallViva1975]

Extremely good animation and explanation. Well done. :)

[@PoisionDragon]

My mind didn't comprehend all of what was going on there, but it does look good so subscribed, liked, and totally faved.

[@timjohnson1199]

Modern automatic transmissions are a marvel of engineering. Glad they work so well so I don't have to work on them myself.

[@ChevyConQueso]

I rebuilt my first, a Ford 3 speed, in high school. Believe it or not, even the new ones aren't that difficult to build. It's a matter of putting it all back together in the same order as it went in with all parts inspected and troublesome or worn ones replaced, and making sure your clearances are set correctly.Troubleshooting one is more difficult because it takes a greater understanding. This video was a random recommendation and I feel the author did a great job showing the Allison 1000. Take in mind, there are many, many different automatics out there with differing parts and methods.

[@DavidG2P]

Awesome video. I'd love to see one about a Ravigneaux type automatic transmission.

[@kebruya]

Make a video on how the hydraulic is being controlled to switch gears

[@riangayus]

Yeah, me to, i want to know...

[@kayrunjaavice1421]

@Mr Sunshines By that logic, this transmission would be called a gear. It isnt a gear. it's a system of gears working together, as is the hydraulic control - a system of valves working together. if you think it is simple, search up a "valve body".

[@ondraklima8412]

@Mr. Sunshine whats is wrong with you

[@Jozefszky]

@Hay Day You are stupid as f**

[@prathameshjadhav5008]

better than what others have presented. thank you so much mate!!!! loved it

[@megamac3898]

I finally could understand the idea with ur clear explanation, thx a lot

[@interlinkknight]

I'm glad I could help

[@zuniga0331]

I have to watch, then come back… watch again and again and again in order to understand transmissions

[@MrCapi55]

Sure it (A tLast!!!) is helpful Interlinkknight. (At my pace, I have to comprehend each "gear movement", day by day, but understanding them firmly, and in a deductive form. Thank You Very Much Interlinkknight.

[@interlinkknight]

You're welcome. I am glad I could help.

[@robinmyman]

The best explanation yet...got it! 👍

[@JohnDoe-mi7tj]

Bonjour de Paris ! As every une says, the best vidéo about Allison transmission ! Everything is now clearer !

[@interlinkknight]

I am so happy I could help. Thanks for your words.

[@JohnDoe-mi7tj]

@@interlinkknight ok I am doing a latex PDF calculating all the ratio ! I was assuming that sun Gear has a radius of r, planetary Gears have a radius of r/2, and of ce the ring Gear a radius of 2r, am I right ?

[@interlinkknight]

I don't understand the question

[@JohnDoe-mi7tj]

@@interlinkknight i am curious about the ratio of the various radius (Sun Gear, planetary Gear set, ring Gear) !in order to do the math ! PS if you are not aware, i will deducte from the ratio of the first Gear ! Thanks you again for your video

[@interlinkknight]

The gear ratios for my model are: 1st: 3.20 2nd: 1.86 3rd: 1.43 4th: 1 5th: 0.70 6th: 0.60 R: 4.41 There are websites that calculate ratios of gear sets. Just add the ratio of one set to the other, if you really want to do it. By the way, to calculate ratios we use teeth amount, not diameter or size.

[@aliqawqazeh7199]

this is the most helpful autogear tutorial goo job brother

[@Astronirav]

Yours is the only explanation that worked. Thanks Man!

[@interlinkknight]

I'm glad

[@EngineTuning]

I must agree with Soylant - your explanation and animation present a genuine learning opportunity. Brownie points earned for not claiming that this is an 'easy to understand' gearbox. However, you did make the 'general concept' easy to understand, whilst at the same time providing the detail, that can be repeat watched. In effect, you managed to kill two birds with one stone. I could watch this one with my son (the benchmark)... whereas the 'learn engineering' vid was a complete fail, as witnessed by the comments (mine included). I think I'll go back and edit my post to add a link to this vid and Thomas Schwenke 's vid (describing a simpler setup).

[@interlinkknight]

+PlayF1 Net Thanks for your words. Is nice knowing my effort is useful for other people.

[@pawned79]

Does the system just lock up if you engage other ring gear combinations such as C2+C5, C3+C4, C4+C5, or triple or some combos?

[@briandrake6881]

Engineering never gets old.

[@manindersingh3536]

Far more easy to understand among other utube videos

[@interlinkknight]

Thanks 🙂

[@ionutadi2000]

#interlinkknight i understand how the internals of an automated gearbox works, you've explained it perfectly, but how exactly does pressing the accelerator transform into shifting gears?

[@interlinkknight]

+adrian ionut On the bottom of the transmission there are a set of valves and solenoids that are controlled by a computer that "decide" what gear to put base on the speed of the car, speed of the engine and position of the pedal.

[@calebsherman886]

InterlinkKnight Ohh, I thought it was mechanically automatic... I was like what's so special about planetary gears that does that? Now I know that it's just a computer.

[@dowskivisionmagicaloracle8593]

I don't understand how the sun gear turns faster on P2 for gear 6 than it does for gear 5. Are you sure you got this right? Or should the configuration for gears 5 and 6 be switched?

[@tcarni21]

​@@dowskivisionmagicaloracle8593 Let me try. In gear 5 and 6, the sun gears turn freely and the planetary gears drive the sun gear. For gear 5 and 6, the output to P3 is the sun gear, not the carrier, and that`s why things change a little. In both cases, the faster the sun gear turns, the faster the final output will be. Imagine that the planetary gears and ring gear are turning at the same speed (like a 4th gear). In this case, the sun gear will spin with the same velocity as the other 2 gears, right? Now imagine that the ring gear is a little bit slower than the planetary gears. In this case, the sun gear need to spin a little bit faster (in relation to the ring gear, since the planetary gears have the same velocity as before) and that`s what happens. Before, the planetary gears were not spinning, just turning. If the ring gets slower, but the planetary gears don`t, they have to start spinning. The bigger the difference in the speed between the ring gear and the planetary gears, the faster the planetary will spin and the faster the sun gear will rotate. In gear 5, since the P2 ring is also rotating in the same direction, the relative velocity between the ring and planetary gears is not that great. In gear 6, the ring is stationary, so the difference between the speeds are bigger...

[@ShivaPremi3708]

Beautiful, Amazing, Genius, Analysis of mechanism..... 👍 no more words to describe your efforts.... Thank you.... 😜

[@CasamTheAnimator]

This explanation is similar to how Lesics also known as Learn Engineering discovered it. Also this is not the number of planet gears per carrier in a real transmission, it actually uses 3 planet gears instead of 4 per carrier in a real transmission.

[@francaishaitam6708]

no difference in the functioning between 3 planet gears and 4 planet gears . but it's have to be mentioned

[@zxcvbnm6669]

This is such a great video the only issue that I would see is that the transitions are extremely too quick not allowing for anyone to process the information that your providing. Also you are moving too fast from one concept to the other. The one Saving Grace is that I could Slow Down the video on KZbin. But thank you thank you for taking the time I'm making this video my life is a lot more enriched.

[@dominicbyrne7954]

Well done. Thanks for producing.

[@kwunmeichan8013]

Thank you sir, I have a question. 9:13 Applying C5 will only prevent the planet gears of P2 from turning. They can still spin. Since the planetary carrier of P1 is connected to the ring gear of P2, I wonder if the motion of P1 will pass to P2 through that path, making the planet gears of P2 to spin, resulting a reverse gear instead of a neutral one. Please correct me if I am wrong :(

[@interlinkknight]

The gears are still going to move with the wheels, but they are still considered in neutral because the engine and the wheels are not connected

[@kwunmeichan8013]

@@interlinkknight Do you mean there are somethings that intercept the power transmission from the P3 carrier to the output shaft during the neutral gear?

[@interlinkknight]

No, but the gears are free to move . A little of friction from the gears might be transmitted to the output but it's so little that it is not relevant

[@anmol7640]

This video is very helpful to understand mechanism Please explain the work of piston in automatic transmission

[@interlinkknight]

There is already a great video explaining that. Link on the description.

[@sleeker165]

Superb explanation - well done !

[@salemogla1495]

thank you very much for this wonderful video .Do you have another ones about how the torque convertor works together with the transmission

[@interlinkknight]

+salem ogla Not really. But would be cool. Maybe someday, but for now I don't have plans of making a torque converter video. Cheers.

[@rathitechnical9701]

धन्यवाद सर इस वीडियो के लिए इस वीडियो में आपने बहुत अच्छी तरीके से समझाया है

[@fcofdz]

Fantastic stuff mate! How are you not at the top of the youtube list!!?

[@caryesan]

Superb illustration. Great work

[@aldahirjaoa7061]

Very interesting!! The reverse, out of normal mind.

[@ellerbrockwelding3056]

since im learning transmissions this helped allot thank you

[@interlinkknight]

+Knights Forge & Gold You're welcome

[@mauriceupton1474]

Really strong Gboxs, used in loaders and trucks.

[@spicydogsoup]

Best video. I actually understand it. The one from Learn Engineering got lots of views but is terrible.

[@theadel8591]

Excellent explanation, btw you explained it better than some channels that have millions of subscribers. I have one question concerning the parking pawl, I always shift the gear when at full stop to neutral even if i'm leaving the car with the foot break fully pressed of course to avoid wearing of the parking pawl so is it right doing that ? Thanks

[@interlinkknight]

Thanks for your kind words. I always follow whatever the owner's manual says, which in this case they always recommend putting the selector in "park" and apply the handbrake whenever you park your car. The parking pawl is made to be used and should last the life of the vehicle. Don't be afraid of wearing that.

[@ChevyConQueso]

This is old, but no it doesn't. I have thrown old Ford and GM transmissions into park while moving at speed, and could hear the pawl grinding itself down, and that still didn't do enough to destroy it when I opened it up to inspect. That is one part I have never had to replace on a rebuild and I haven't heard of anyone else having to either. My experience is primarily with rear wheel drive American brand transmissions though. Once it's engaged, it's engaged and not going anywhere.

[@garyr7027]

And that's the simple explanation, all that makes those planetary gears move or not is where it gets complicated.

[@ChevyConQueso]

Most difficult thing for me was wrapping my head around the valve body for the first time. : ) Everything else is gravy.

[@TractorsChemer]

Niiiiiice video!

[@pauljordan756]

wowsa!!!! i am drinking an few adult beverages this evening watching this in my shop and you BLEW my mind!!!! :)

[@creamyfilling102]

who the hell sat around and came up with this frickin design? my brain hurts just watching it.

[@interlinkknight]

+creamyfilling102 Then you should watch the video call "ZF 8HP 8 Speed Automatic Transmission" by WeberAuto. That is a crazy complicated transmission. Your brain will not only hurt, but it will explode.

[@Memento-Mori-2022]

Very nicely done, good video thanks man, good explanation and good animation.

[@mario_uzumaki]

it's like a sliding mesh but with smaller size and more complex. and have more frictions. end result : smaller but needs more oil than synchromesh

[@pedroivomeirinhogalvao3755]

Awesome mechanism, but how does the braking clutches go from disengaged to engaged? Thanks! Keep up the good work :)

[@interlinkknight]

On the description there is a link to a video showing how the clutches actually work. They use hydraulic pressure to move pistons that push the clutch plates together.

[@pedroivomeirinhogalvao3755]

InterlinkKnight Oh, of course! thanks for replying!

[@kalonientile8594]

Awesome explanation

[@CatsForLife21]

Thank you very much for this wonderful animation. I'd have to watch it a few more times to grasp it better but its good that you explained each gear including N & P. #OneMessageFoundation

[@interlinkknight]

I'm glad I could help

[@lynnlynn3379]

perfect video to understand auto gear Thanks

[@ratankumaryadav3801]

excellent demonstration & explanation,many many thanks.

[@interlinkknight]

I am glad it was useful.

[@junjungunawan6220]

good job. really easy to understand. thank you bro.

[@youtuber-xn9of]

hi. realy helpful and thank you very much for the video. which software did you use to create this animation. i need to create an educational video for children to promote disability awareness. it will be a great help. thank you

[@interlinkknight]

Blender

[@arnon-jaya]

2 nov 2019 11:39 am edt:thanks, i wonder how transmission look like during n/neutral with car descending a hill

[@mythoughtsonfaith1031]

possibly add a clutch between sun p2 and sun p3 , then engage c2 and c5? and what about c3 and c4?

[@FavoritResept]

The best explanation... Thanks...

[@interlinkknight]

You're welcome

[@straight_intro]

i've got the question. turn up 3:37 and can you say if we can have a 7th gear by engaging c2 and c5 clutches?

[@interlinkknight]

The answer is no. If the C2 clutch is engaged it would make the ring gear of the planetary gear set #3 (P3) turn with the input, and the C5 clutch blocks the ring gear of P3, so if you engage C2 and C5 you would lock/block everything. Is hard to follow the energy path, but watch carefully a few times and you will get it.

[@straight_intro]

thank you for your respond, i still don't understand the whole system by 100 percent, but i see the logic and the harmonic relation between these components, i was falling asleep in the late night, when i watched this video 5th time ever. thank you for your job, this is the only video, that helped me to understand the automatic transmission principle. i would really appreciate if you made similar explanation videos on 7-speed and 8-speed automatic transmissions (such as mb 7-g tronic, gm hydramatic 8l90 or zf 8hp). thank you for your job!

[@interlinkknight]

I am glad I could help. Although I doubt I will ever make a video about other transmissions with more speeds because is hard work making the 3D model and the animation. I made this 3D model because I wanted to 3D print it someday to make it work in real life (small scale). After I had the 3D model, I realize I could make the animation and make a video explaining how it works. Also, if we all have a hard time understanding this basic/simple Allison transmission, can you imagine how hard would it be trying to understand the 8th speed transmissions? I've seen them from inside. Those are crazy complex.

[@pawned79]

If there was a P4 instead, would the sun hear of P4 also be connected to the sun gear of P3-P2, and the result would give you an eight-speed transmission? If so, does this continue to scale by two’s? Additionally, is P1 special only because you want to gain reverse? If reverse was not desired, would you be able to simplify the design?

[@tomknud]

Excellent demonstration!

[@hate6974]

Really Best 3D Education...

[@mwconne]

Would applying C2 + C5 result in a 7th gear ratio?

[@interlinkknight]

Applying C2 and C5 would block the input. C5 clutch would not allow C2 to move

[@roland20002000]

OK so I kind of get how the gears work and how the torque converter works but how does the car know when to change gear? BTW great video's

[@interlinkknight]

A computer decide what gear to put based on speed, engine rpm and throttle position

[@roland20002000]

@@interlinkknight Cool. Thanks for the reply

[@dhananjaysawant9168]

Nice explanation sir, keep it up.

[@jamulandkim3957]

wow definitely I have to watch a number of times before I get it, but my question is once in neutral and at high speed when the vehicle is on, is it ok to go back to drive, or will the transmission get damaged?

[@interlinkknight]

As far I know it would not damage the transmission. I've done it and my transmission is fine

[@yeahwerepthesamesmartech7113]

thanks for breaking it down.. i like having this knowledge

[@colby4390]

For P1, P2, and P3 to engage individually they each need a multiplate clutch?

[@interlinkknight]

Yes, there are 5 clutches in total: 3 for each planetary gear set and 2 for the input

[@pbierre]

Is there direct metal-to-metal contact of the torque-transmitting gear surfaces? Or, are they separated by a thin layer of tranny fluid? Why is there is hydraulic pump to up-pressure the tranny fluid?

[@interlinkknight]

There's fluid everywhere. The pump keep the fluid moving

[@wildlife917]

Best explanation.

[@cobyjay7607]

Can you make a video for the 3-speed double planetary set in say a Toyota 2000?

[@interlinkknight]

That would be cool but I have many projects I'm working on, so maybe in the future. I encourage you to make it yourself, maybe with Fusion 360. It's easy to use, free and you can do basically anything. Give it a try!

[@mido202022ify]

thank you ..it is amazing and helpful

[@Eye_Exist]

Can someone who knows the tautomatic transmission better answer to me: When I visualize it, it sounds like transmitting the power through all these gears wastes lots more energy compared to gear-wise much simplier manual transmission. Am I correct?

[@joserodriguez2632]

This is a very good and well explain presentation I just wonder how people give thumb down without taking the time to analize what is given free of charge ,they should go back to elementary school to see if they could learn from (0). thanks again .

[@ghidanabobaker9319]

you have done good job

[@ewthmatth]

The problem with this and most other videos about automatic transmission is that they don't explain why this kind of planetary gear design is more suitible to be automated than the mechanisms of a traditional manual transmission.

[@interlinkknight]

That wasn't my objective with this video. Not even close

[@dowskivisionmagicaloracle8593]

I don't understand how the sun gear turns faster on P2 for gear 6 than it does for gear 5. Are you sure you got this right? Or should the configuration for gears 5 and 6 be switched?

[@interlinkknight]

I am sure it is right. Just watch the video carefully.

[@dowskivisionmagicaloracle8593]

+InterlinkKnight No, seriously. If for gear 5 the ring gear and sun gear are turning at input speed for P2 whereas for gear 6 ONLY the sun gear is turning at input speed how can the result possibly be faster?

[@interlinkknight]

P2 on 6th gear: - Ring static; - Carrier spinning with the input; - Sun gear going a lot faster than the input. P2 but now in an alternative situation: - Ring gear spinning with the input; - Carrier spinning with the input; - Sun gear going at the same speed as the input. Can you fill the gap in between both situations? What happens if the ring turns a little instead of a lot? Well, the sun gear would turn faster than the input but not as much as if the ring would be static.