Have you thought about revisiting this video? I love how your videos have evolved over time and I think you could really knock this out of the park with an actual differential opened up to show how it works and go through the pros and cons.

@johnbailey7038

4 жыл бұрын

Bernie Lee i was feeling the same way, but thats not to say the original is bad though. This is a really difficult thing to try explaining to people who may not be mechanically inclined

@autoSRI

3 жыл бұрын

It’s easy to understand if you already understand it but if your trying to learn it’s really confusing

@gonzccs

3 жыл бұрын

Love to see this guy making a living out of this channel from this humble beginnings. Who would have thought that being a KZreadr could become something 8 years ago?

@benmudn

3 жыл бұрын

I totally agree. Having recently bought a TrueTrac and for the life of me can not grasp how it completely works. I have watched every video on yt and still no luck. I consider myself fairly mechanically inclined, heck I installed the gears in the axle with the TrueTrac. Yukon/Spartan just release their version of the Torsen LSD.

I would like you to revisit this series. Your skills as a presenter were good. You have become much better.

That said, it is nice to have someone realize how much effort it takes, rather than just saying "make more videos!"

I'm sitting procrastinating in front of my pc, coffee in hand. Having just bought a Audi with a Torsen Quattro I've been watching video's all morning. After watching this I was thrown back to my University days and I'm sitting reminiscing! Thanks for the video, you can't beat a nice simple white board explanation: and well done on the isometric projection of the worm wheel. If I'd drawn that it'd have been much more wobbly looking!

@EngineeringExplained

9 жыл бұрын

Malcolm King Glad you enjoy the videos! The drawings are certainly challenging at times.

They're both directly driven from the ring gear, as the shafts running through the worm wheels are connected to the worm gears of each drive axle, thus both axles are rotated by rotating the differential housing. Thanks for watching!

@infidel900rr

2 жыл бұрын

Trying to understand this in a hard driving scenario: Q. When power oversteering out of a corner, if the inside wheel starts spinning out (one-wheel-peel scenario of an open diff), will the outside wheel engage and turn but turn at a slower rate? OR Will the outside wheel which is already rotating faster (entering the apex, but not yet breaking traction), remain the faster rotating wheel as power oversteer is introduced after the apex of the corner? Thanks and sorry for the comment on an old video - trying to figure out which LSD I want to buy.

This is some CLASSIC KZread right here.

You are welcome, thank you for watching!

Check out my website FAQs. Link in the video description or on my channel page.

That eureka moment when you explained the reasoning behind the spur gears (them not being able to turn the same direction when both wheels have equal traction). I've got massive respect for you attempting to explain this man and think you've succeeded pretty well. Quite a daunting thing to explain.

@jogrobler

9 жыл бұрын

JO Grobler Also, this video helped me visualise how it all works. Even though it's in French, it's really well done visually and even includes a cut-away of a working Torsen >> /watch?v=vS6FXZSx8aA

So put basically, the only time the wheels are allowed to spin at different radial velocities is when each one has friction with the ground, creating an equal and opposite radial velocity in relation to the diff housing, when one is slipping, the reverse worm drive effect blocks any lost torque. If one wheel is not imparting any force back through the differential then the diff locks automatically. I'd hate to be the engineer who designed this trying to explain his idea!

@georgipartsalev6193

4 жыл бұрын

Your comment was genuinely very helpful!

@benbrinkhurst8722

3 жыл бұрын

Fantastically helpful

Haha, it took a few tries. I didn't even want to think about drawing diffs when I first started this channel. But since it's grown, I'll put a tad more effort in. Glad to hear it's appreciated!

This is honestly one of THE most clearest explanations of a torsen LSD that I have ever seen! Thank you so so much Jason :)

It's remarquable how you were able to explain this using a white board only! I teach auto mechanics and was never able to explain this efficiently using only a board. However, it seems that you only explained the operation during the normal phases (when acting as an open differential), and you forgot to explain the easier phase, when it locks (as one wheel has no traction and the system locks: only one wheel wants to turn, its worm gear as well, trying to turn the worm wheel, the worm wheel is meshing with the opposite worm wheel which in turn tries to turn its worm gear, it cannot. So the worm wheels are unable to spin on their axis, the worm gears are both driven as it locks) Cheers!

@EngineeringExplained

8 жыл бұрын

+Nabil Chouchany Thanks for the kind words! I created a second video explaining how the torque transfer occurs: kzread.info/dash/bejne/nnins6OsYK_KldY.html Cheers!

Thank you for watching!

Have you ever thought about doing a live video? To answer questions about what your explaining depending on the topic? Another thing is, have you ever thought about doing this stuff on the computer to add moving pictures etc. Your drawings are amazing and must take a long time to do. Thank you!

Thanks! I try my best!

It would indeed and I hope to get a bit more into videos with the actual item along side. Ideally I could get companies to send parts (see my nitrous video) but that's not quite as easy as it sounds. Just looking at a few images of a quaife it seems to operate under similar principles as a torsen.

Thank you! It was certainly a challenge.

No, they both are connected to the diff housing via the shafts in the worm wheels, thus, both receive the same rotational force.

world is a better place with your videos ! Thx.

@EngineeringExplained

10 жыл бұрын

Haha great to hear, thanks for watching!

@jorikarjalainen

3 жыл бұрын

Agreed

Each have situations where one may be preferred. I'm assuming by normal you mean a clutch type. Clutch types are a little more tunable, you can get it to the characteristics you prefer. Torsen is definitely more useful than a typical open differential in order to maximize power delivery to the ground.

Well, I would say it depends on the application. But for racing probably a clutch type. Though honestly I think Torsen is a great solution to the problem of an open diff as well.

Took me 5 days. 5 days!! But I've finally got it. Amazing teaching mr. Jason, thanks for sharing your knowledge, absolutely appreciated!!

Great to hear!

Well, it doesn't have as much wear as a clutch type, and doesn't require specific fluid conditions of the viscous. It certainly has some advantages, though overall I think a clutch based system would likely be all around the best option, once you've nailed down the specific application. It's standard on the new FRS/BRZ, I believe the Miata may use it as well, as well as some Audi vehicles.

Check out my video "Torsen LSD Torque Transfer" which goes into the friction a bit more. The worm wheels are part of it, yes, but there are other spots as well. And yes, these friction areas are essentially the "clutch" of a clutch type lsd.

Difs are probably the hardest thing to explain to people in terms of how they work without using a physical model, you do a great job explaining them using just the trusty whiteboard.

When it comes to technical things, you are simply THE BEST.

This video made me understand some critical missing points from many 3D animation videos! Great job!

I have to share a quick story on how I first learned how a differential worked...47 years ago as a young teenager. My friends dad built a working differential using parts from a mechano set. He was a mechanical engineer and a very clever man. He is 93 today and still works at his home based machine shop. Nothing like holding something in your hand to see how it works. Some things are so difficult to explain but some how you seem to manage. Great video!

man........ u r d best seriously u always help me in passing my xams.... well thats the secondary thing. most important is u just make engineering easy !! keep uploading more videos

Very Impressive set of videos. A way to look at it that might make it easier to explain how a Torsen allows the output shafts to rotate at different rates is to treat the faster rotating output shaft like it's the only rotational input to the system. If you held one output shaft and applied a rotation to the other output shaft, then the worm gear of the driven output shaft will rotate it's corresponding worm wheel. The spur gears on the worm wheels synchronize the worm wheels together and force them to rotate at the same rate. The rate at which the worm wheels rotate is exactly the rate required for the worm wheel of the held output shaft to move around the circumference of it's associated stationary worm gear at a rate equal to the that which the driven output shaft is rotated. So, when both shafts are rotating at different rates, as in a turn, relatively speaking, it's exactly the same scenario as I described above. It's as if the ground is rotating the faster tire at a rate equal to the difference while holding the slower tire. That rotational "input" from the ground to the faster tire allows the worm gears to turn the worm wheels, allowing the worm wheel of the slower output shaft to traverse the circumference of its associated worm gear, thus allowing the tires to rotate at different rates. On the other hand, In the slippery wheel scenario, there is no rotational "input" from the ground. The only rotational input is from the ring gear. Since a worm wheel cannot rotate a worm gear, it must lock against it and transmit the case rotation to the output shafts, thus transmitting torque to the wheel with the most resistance and locking the rotation rate of both output shafts to that wheel. I don't know if that makes it any clearer, but it's how I think about it.

I got it, I watched a video with a 3-D model and didn't catch on but with your help I see how one wheel can spin at a different speed. Thanks, great video.

Thanks for putting so much work into these. They are great and I can't stop watching them!

Great Job on successfully concluding the challenging task! Especially on how you explained the action of the differential, that being the difference in speed between the two axles in terms of relative motion. Wonderful work!

Congratulations! is the first video I have seen of Torsen that really help me to understand it. GREAT!

I greatly appreciate your work, the differential playlist is pure gold!

These are the types of videos that are invaluable on youtube. Well explained!

One thing I love is gears. I've always been fascinated with then. Gear ratios and all that. Haven't took any classes on it but I've always as a little kid took things apart that involved gearing to see how it all worked. Lol

They're the link for the two drive axles. They are what connects the two sides.

Really good explanation and the animation was a must. I now understand the diff in my car. One suggestion I would make is if you had an ipad or something to play the animation on continuous loop stuck on the wall next to your white board that might help with a little too? Food for thought Keep up the awesome work please

I knew you were excellent at explaining things, but this one is particularly impressive considering the complexity of the mechanism. Well done :)

Had roughly know how this works for a while after watching a 3d animation but this video cleared up any confusing bits. Excellent video.

Word just am figuring out my firebird with lsd so I'm pretty pumped to learn more and take it apart but deffently useful info thanks dude

7:48 I get it! Man it was hard to understand initially, but as soon as you said that, it suddenly made sense. Congrats on a successful explanation of a VERY difficult topic.

I'm a little uncertain myself on that point. I agree; it's basically metal on metal and you would assume wear would occur. That said, if the speed difference between the two is fairly minimal, makes sense that it could last quite a while.

First, I really appreciate this video. Second, I have a correction. He says toward the end that one wheel moving faster than the other will cause the worm wheels to rotate and one will slide over the slower-rotating wheel's worm gear. However, this is not what happens. If one wheel moves faster than the Diff housing by a certain amount, the other wheel must slow by that exact amount *on its own* for the worm wheels to turn. This is what happens when making a turn. If that is not the case, then the Diff housing and output shafts effectively lock up and torque is transferred from the faster-rotating side to the slower side. This is why the Diff is called "limited slip."

Thanks!

Thanks! And thanks for defining awesomer, we were all lost.

Hey!!! Awesome videos. I love the way you explain everything. Could you please make a video on how the Eaton TrueTrac diff works?

I'm astonished of how cleverly the mechanism was designed to work, hats off to the great engineers.

Excellent explanation!

Indeed.

Yes, thinking of how complex it is to explain, versus how complex it is to just "think" of; it's rather remarkable.

Really well explained and the animation you link really helped.

Animation really helped your explanation. Great video, thanks! Very interesting!

Interesting. I understand that Torsen came up with the idea of this form of drive for a diff. Unless I am mistaken it was Gleason in America, a gear making company that got it with their gear cutting tech. I only here in Australia know it as a Torsen/Gleason Diff well used and highly respected by many that need the benefits of the traction and ability to go round curves. Cheers from John Australia.

Good explanation of how the torsen diff works!

I can tell how much easier you now find explaining rather basic (once you know) mechanical engineering principles for the general layman. I went through a process of trying to design my own method as there's quite a few variations but figured why re Invent the wheel. 🤔

best explanation i've seen so far !

thanks Paul

great vid. I'm looking forward to partII.

A guy on Jalopnik was wrote an article about 4WD vs AWD the other day and linked this video into to explain it! Great job on the explanation, however that is a very confusing differential...

What are we comparing it to? Open differentials, or other LSDs? Better than open for the obvious reasons. Better than viscous because the torque transfer is instant. Doesn't wear like a clutch type. But, it doesn't transfer torque if one tire is in the air, unlike a clutch type.

I know I need to make an ELSD video; don't know when I will though.

Pretty well explained. Thanks!!!

Complicated AF, thank you for making it understandable!

It made sense. Thanks for the great video.

WELL EXPLAINED MATE ! ! Cheers from Australia

its fascinating to see how someone actually could design this complicated system of gears.

Great explaining!!! Thank You :)

in effect it is not that the slower axle moves backward but rather the worm on that axle is in a locked position on the axle and revolves with it. as a result the faster axle (less loaded) is forced to spin faster - as the axle can spin the worm but not the other way around. thanks for a good video.

Jason, I think it might be very usefull for you to revisit this, not only because of your hairstyle.

The other can still rotate assuming it overcomes the internal friction forces.

Actually it made a lot of sense. Clear and comprehensive explanation, great stuff once again! These videos are really refreshing and interesting after a day of studying medicine. ;)

It makes absolute sense at the end. You should just have said "the whole torsen group will rotate around the 'stationary' gear". Thanks for the amazing vids.

I had to scratch my head a couple times but it made sense for the most part. Whoever invented the Torsen Differential was an engineering god!

Boy have you improved over time! Also, I see how they torsion LSD allows for slip, but I didn't see how it limits the slip to provide traction to both wheels.

Though it can also be achieved by cutting the spark; this is a bit more harsh of a stop.

I get plenty of sleep! Haha. It's a lot of work for sure, comes down to managing my time well. I'm not searching for a new job either. But yes, 40 hours a week, plus making videos (5-10 hours) plus comments (5 hours) plus website (1-2 hours) plus facebook (~3 hours); it's a lot of work. I enjoy it though! Still get to go skiing on the weekends!

Thorson is wonderful. I used it in a stock car rather then a spool and loved it.

Got it the first time. Very nicely explained. Didn't watch your other "advised" videos.

@zacharylagler242

8 жыл бұрын

+Ellis Preston I watch all his video's. He is very respected for explaining anything car related

Very helpful, thanks a lot!

Please, make a video about the quaife differential, or spur gear differentials in general!

Very good videos! Thanks man!

Brave man doing Torsen on a whiteboard ;) Much appreciated.

I'm not sure about minimum requirements and all, but I have written a fairly extensive article on this. Here's the link (it's on my website, see video description -> FAQ -> Future Plans): Replace the two (dot)'s with "." howdoesacarwork(dot)com/p/should-i-become-mechanic-mechanical(dot)html

Could you do a follow up video explaining the differences and potential benefits of Type T-1, T-2, T-2R, and T-3. I'm particularly interested in what applications they are best suited for...front diff, rear diff, center diff.

brilliant video....i was hoping u could do one on the cam and pawl type LSD...or maybe suggest any useful links explaining the same..thanks

My daily driver is in the shop for the yearly inspection, so i'm driving an FF with open differential right now. I live near the alps and yesterday we had about 25cm snow. My rx8 really shines in that conditions, the crappy kangoo sucks. I expected the ESP to make up for the open diff at least a littl bit, i hoped it would send some of the power to the wheel with more grip. I was not completely right. It kinda does that, but that also slows the car down. When there is not enough grip to accelerate and you need momentum to get up the hill, that really sucks. Instead of having a big smile, i was worried about getting stuck. Torsen is awesome, if you buy a new car, an it's an option, get it! It's worth every cent.

This is something which is very difficult to explain..and you tried your best..welldone... And thank you...:)

Well done for explaining something very complex! Mr. Torsen must have had a strange brain.

Great explanation, you made that sound simple the first time I watched it. I'm guessing that because of the way it is designed, if the left wheel is going x times faster , then the right wheel must go x times slower since the worm wheels rotate at the same speed (opposite direction). I'm wandering if in actual RWD applications, if that behavior is considered ideal, or just closer to ideal than a differential that doesn't allow different wheel speeds. Thanks for the video.

Very well done!

hahaha, bro, I got your explanation, and I got how difficult to explain this stuff without 3D model as well. hahaha! nice shot anyway, like ur video.

This is the video that got me subscribed to you in the first place. :)

I would say it's a quite good video clip explaining Torsen LSD

If you did´t understand at 8:20 just go watch the 3D video of the differential again and check how the spur gears go on different direction while one wheel is going faster than the other

Thanks for getting back to me mate and so fast I perhaps should have looked at the 3d animation as this suggests the same. Sorry I should have looked. Thanks again though and looking forward to more vids

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