What's a Torsen™ differential? Why is it so cool?
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- เผยแพร่เมื่อ 3 ต.ค. 2022
- 3D Printed model of a limited slip differential. Limited Slip differentials are fascinating. They are a simple solution to a necessary problem packed into an ingenious mechanical package. In this video we will learn the theory behind how it works
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I loved the part where they explained how a torsen works
Must have missed that part
poor ; on;;;;;;; po; pppppppppop
They never promised an explanation of how it works, just what it is
@@hehe8138 read the title
@@hehe8138 and they've said "and what exactly is it?" in the video
What's a Torsen differential?
"It's a differential"
Why is it so cool?
"Its a differential"
Seriously, he explained nothing
A normal differential applies power to the wheel with the LEAST traction. A limited slip differential locks up, forcing the wheel with the most traction to turn. Too tight a corner and the differential can still bind. When you watch Formula One from the driver's camera you will see him adjusting the differential for every corner to get the power to the road with limited wheel spin.
A Torsen differential, however, applies power to the wheel that has the BEST traction, which will power the vehicle forward.
I think he did explain what a differential is used for, but not exactly what it is.
Bruh you missed the part where he explained that it automatically redistributes torque based on wheel-to-wheel resistance. Moron.
@@randytaylor1258 nice, thanks for writing that
This explained n o t h i n g lol
That's about par for torsen diffs
Was gonna say the same thing. Seems like a downgrade from the “normal” spider gear diff. More moving parts = more that can go wrong.
I’ve read the numerous comments that explain how its actually an upgrade. I do believe you, i just have to do some research for myself and actually fully understand how it works.
@@mathiastheapprentice if it is in a performance car it's a huge upgrade...
@@chriss1914 i mean I haven’t looked into them at all. I haven’t met one in the shop yet, but yea I suppose it could be a upgrade for sports cars.
Finish preschool then you'll get it
I tried to do a burnout in my truck and now I have an unlimited slip differential.
6 neutrals go brrr
@@ambiguoustvreference835 😂
@@ambiguoustvreference835 4L60 go PNNNNN
@@ambiguoustvreference835 🤣🤣I neva heard no mofo say 6 neutrals 🤣🤣🤣🤣🤣🤣
It was an automatic transmission and it needed little help to get started from the little "N" setting on your gear shift... I'm right, aren't I?
I love the way he showed it.
One side(traction side) was held still making the no traction side spin.
Just like an open diff.
When he resisted the spinning side, then the non spinning side started spinning.
Just like an open diff.
was thinking that lmao
yes same XD
Can you make a video showing what locking and unlocking a differential does? Great video btw
Well it just lock the inside so everything moves as a single axle.
It's usually a clutch or dogs that locks the diff to the axles. A clutch is smoother and can be used while turning, dogs can only be switched when the car is stopped or there's no speed difference between the wheel, aka going straight.
Go weld your diff and answer the question
Go search TH-cam for a longer video. It's so cool
m.th-cam.com/video/yYAw79386WI/w-d-xo.html
Here the video
It literally just binds those blue gears in the middle. A lot of people who make cheap drift cars will make a locked diff by just straight up welding the gears together lol
Torsens are black magic in the car world. We all know how they work (your description) but no one really know HOW it works (what's actually happening inside a torsen)
Engineerd bullshit. That's all I'll say.
Same as planetary gear sets in auto transmissions! Black steel magic.
@@AngryCarMechanic username checks out
I appreciate the effort, but this representation in the video is showing a Torsen differential working as an open differential. This is because it is missing the key parts of the Torsen that makes it a limited slip. A real one uses spring washers to apply force against the helical gears, creating friction. This friction resists differential velocity from the left and right side of the diff, doing so gets the differential to work more and more like a locked diff, allowing torque to be transfered to each wheel unequally.
@@maxwellkline2766 only variant T2R has a spring loaded diff lock, the rest are based on the same worm gear/wheel setup. No friction is involved, otherwise it wouldn't be "real-time".
Hummers had torsen t1s. If any of your wheels were in the air you could apply the brakes to lock the wheels and give it gas to distribute torque to the other wheels
That’s actually really cool
Wait, how can the other wheels turn if you are applying the brake?
@@user-cv7tp1el2q The T1s have a very high torque bias. when you use a the brakes and apply small amounts of gas the differential locks both tires together, the torque overcomes the friction of the brakes, and since the hummers/humvees are AWD the front and rear axle are locked together at the same speeds
The Torson differential *multiplies the torque* applied to the more rapidly spinning wheel so that only a light application of brake pedal will create a much larger torque on the slower wheels. The designed ratio varies from approximately '2.5:1' to '6:1' (or higher).
@@user-cv7tp1el2q basically, the amount of torque the torsen can send to the wheel with more traction is proportional to the amount of torque thats being output by the wheel with less traction. In simpler terms, for the torsen to limit slip, the slipping wheel has to have SOME traction, something to push against. Applying the brakes gives the slipping wheel something to push against, which allows the torsen to send torque to the non-slipping wheel, enough to both overcome the brakes and get the car unstuck.
Kick Ass little nice to know: TORque SENsing Differential = Torsen
my favorite part, when he full restrained one of the "wheels" and the other spun
Yeah he's demonstrating the exact thing that Torsen differentials are NOT supposed to do! lol
Now we need to go back in time and ask the Jam Handy Organization to produce an instructional film explaining how that differential works
I loved when he explained how a torsen diff works and not just a open diff
thanks
If you want a good explanation on how differentials work, there’s a series from General Motors I believe that came out in either the 1930s or 1940s that explains it in a way that’s SUUUPER easy to understand.
How to find that video?
@@gregsmith7307 Just search for GM Differential 1930s in TH-cam. I can't post links in comments because they get removed by TH-cam.
It amazes me that someone figured this all out and created this system. The sheer brilliance in it
"This... Is a really cool looking pencil sharpener." 😄
Had someone tell me they welded half of a diff and turned it into a limited slip 😂
Well, it is limited by zero slip. So I guess they are kinda right
I also knew a guy who welded a diff on his ute. He struggled with roundabouts
@@HartyBiker ah see when you weld a diff you can only do roundabouts sideways 😂
@@HartyBiker skrt skrt skrt
@@HartyBiker *squealing intensifies*
“And anyone who’s ever been stuck in the mud in Alabama knows, you step on the gas, one tire spins; the other one...nothin’”
Underrated comment 👏 Great Reference
thats an open differential. not the same thing. this torsen diff actually prevents that from happening
"Did you buy those grits from the same person who gave jack his beanstalk beans?"
No lsd in that car u talking about
Fuck. I haven't seen that in years.
can we get a break down of how this works
These tik tok videos leave a lot of wanting
"wheel with more grip will get more torque"
Meanwhile free wheel getting more torque
and yet, the first thing we do to mod cars is to weld those up
finally i understand how they work
You need to make a follow up video describing how the helical gears work in relationship with each other to allow the differential to operate how it does.
This type of differential is found in cars like Audi, BMW, majority of German cars. The first time I saw one I was lost for words.
It's also found in the Toyota Yaris GR with the Circuit Pack
Torsen is most famous for being used in Audi's. I never heard of torsen being used in bmw. Bmw use plated differential or electronic.
AWESOME
Wow! Engineering is fascinating! 🤯
I love this shit so much. Takes me back to when I was 4 and tinkering with my legos
wow now I know that exists
great!
Used to install those in Toyota pickups and 4Runners when I worked at a custom 4x4 shop, years ago.
They work great on slippery roads & off-road. Their parts are weaker than a full locker like an ARB. But sometimes this design gives you better traction than a full locker.
Yukon Gear makes them for my diesel Dodge Ram but I haven’t purchased one yet.
The parts don't have to be as strong (heavy).because they're not fighting against each other like a LSD.
try to figure out how it works just by watching, it’s like just the right amount difficult to be fun
That looks like a great, always on the desk, stress reliever. Would love to print one for myself.
In other words it's a highly sophisticated one wheel peal.
Fun fact, no matter how sharp a turn, the additional distance the outer wheels have to cover stay the same.
Nope. All 4 wheels move in a different arc and so travel a different distance.
I love the Torsen LSD, one of my favorites and worth printing and showing to kids who would be mechanics
I used to run a torsen in my track built Volvo. They work great!
What Volvo was it?
@@terracar2003 1996 Volvo 940 sedan. Not a professional build tho, just a hobbyist trying to squeeze performance out of an old box on a budget and happened to find a torsen diff in a crashed 940 when searching for the original cintrifugal limited slip diff on a junk yard.
@@isaks3243 Thats an awesome find, ive always wanted a torsen diff but never had a car to put it in my 89 244 is halfway through an engine swap and my suburban is not worthy of such a performance mod
THE ULTIMATE PENCIL SHARPENER
I have this system rear end im my truck. It acts as an open differential around corners that I'm off acceleration, then as I get back on the throttle both wheels get the power. It feels like the vehicle has tourqe vectoring but it is purely mechanical
so it does the exact same thing as a posi unit with spider gears.
Torque vectoring can also be 100% mechanical
first thing I'm gonna print when I get my 3d printer, this is so fking cool
The irony is that without a differential, the wheels on the powered axle will bind in a tight turn, but a differential applies power to the wheel with the least traction.
A Torsen differential.applies power to the wheel that has the best traction and so can best use it.
Ngl that's pretty cool, I kinda want to take it apart and look at it though
Thank you for that great explanation
A Gleason Torsen differential works on the principle of a worm gear making a spur type gear turn, but not the other way. So when a wheel slips, the worm gears apply more torque to the non-slipping wheel. There are another videos which demonstrate this.
oh i see. this is a way better explaination than the video :)
That's why i upgraded mine and got a lower ratio too.
I think I have that one in the front of my 4x4 Van. Unfortunately it doesn't work if one wheel goes airborne. Applying brakes lightly can solve that problem though. I love it better than my air locker.
Need more vids like rhat
I want to say if it's a limited slip, why is the wheel you're stopping not trying to move. In a normal differential the tire that doesn't have traction spins
Nice! I was about to model a torque vectoring differential years ago for my race team but I had a road accident and didn't remember any of it. XD
Share the STL files and hardware list?
For ppl that don't understand
Hea saying we have these gears inside of an Axle housing that helps our vehicles tires go at different speeds. The reason why 1 tire is going faster then the other is due to 1 tire is getting power and the other isn't. The power is coming from the crank shift which is providing up and down and left to right motion. The cramck shift connects to the transmission which the transmission is connected to the drive shift and the crankshaft is making the transmission spin inside. Following back from the transmission comes the driveshaft which makes the driveshaft spin (which the crankshaft is still providing power.) That Driveshaft is then connected to the Axle housing to where the diff is connected to those gears that he is talking about)
Hopfully I dumbed it down A bit
Always wanted to see exactly how this works
Never knew that. Very cool! Thanks for the video
It DOESN'T transfer the torque to the wheel that needs it the most. It transfers it equally to both wheels and if one of those is stuck then it will transfer to the one that is still spinning. That's how you get stuck in snow or slippery surfaces on one side.
A limited slip differential will only let one of the wheels spin a certain amount more than the other so it will force both wheels to turn. This reduces the risk of you getting stuck because both wheels are driven, even if it's a different amount.
also called LSD for short, not to be mixed up with anything else….
as your demonstration showed however, their limitation is that they do not work in a zero traction situation like on ice, in that case they act like an open differential. in cases like that a traditional clutch based LSD or just a plain old locker would be the equipment of choice. to know this firsthand because I used to live in an area that was snowy and icy around 8 months a year and my car had a torsion, which unfortunately did me absolutely no good 90% of the time when driving during the snowy season and especially during breakup.
for the people still wondering how they work, it's due to the worm wheels and gears and the fact that a worm gear can drive a warm wheel, but not the other way around. the way it's set up is that when there is a speed differential below a certain threshold, like taking a turn, the worm gear will drive the worm wheel allowing for differential power transfer, but over a certain threshold like a break in traction the worm wheel will try to drive the worm gear which it cannot so the whole system locks up and causes the differential to act like a locked/welded diff sending equal power to both wheels until the differential is low enough that the worm Wheels stop trying to drive the worm gears which allows the differential to basically unlock.
Nice breakdown 👍
I had a torsen in my NA8 miata. I sure miss that car.
Very well done
This is the kind of differential that is between the axles on the newer all-wheel drive SUV's.. In these cars/trucks, there are three differentials. One in between the back wheels, one in between the front wheels, and one between the axles, after the transmission. It had this thing instead of a slipper cogged belt and a transfer case.
My auto shop professor recently taught this
Interesting stuff
I have one on my 12 bolt by Eaton.
Truetrac?
@The Negus yup. Some unit
Incredible what geniuses come up with, we'd still be sliding around turns with solid axles if it wasn't for this dudes contraption
This didn't explain it's function, it just explained that a differential works
Great vid thanks
I love how the car negotiates turns 😂
“This pacific type of limited slip differential”
Love the toy Torsen diff. Want one for my desk.
I saw this old-school black-and-white video that explained how the front and rear axles on a car worked. Felt like that was far more educational in its presentation. Also it lasted more than a minute short.
This is what 3rd graders in China are studying. Here, our teachers are playing "guess my sexual preference" with someone else's children 🙄
Now I realize that cars turn using the same principle as a tank. The turn side wheel (track) is just moving at a slower speed than the other one which forces the whole body of the car to move. Fascinating! I still didn't learn anything meaning about the Torsen though 😅
I actually knew how this worked because I used to build a lot of the Lego cars.
This is a neat video, but we want to understand how THIS differential works. What allows the different speeds but causes it to lock up when one wheel is slipping.
How are people so smart to come up with an invention like this
Nice explaining bro
nice explanation
The easiest way to describe it is that one wheel can only go faster than the differential cage (ie you cannot drive backwards through a worm gear ... and most multistart helicals). T he inner wheel takes the torque because the slower wheel is effectively locked to the cage the outer wheel is free to go faster.
If you hold one wheel with a normal differential the other wheel will go twice as fast ... if you hold one wheel with a Torsen (TORque SENsing) differential the other wheel will just idle and you will soon let go of the held wheel as it tries to pull your arms off❗
Negotiating a turn.
“Sir they have hostages!”
"Tires with better traction receive more torque while tires with worse traction receive less torque." So answer this: Why is it that when you grabbed one of the wheels (applied traction) it stopped spinning (no torque) while the wheel that was freely spinning (no traction) received all of the power?
Confusion >>> understanding
It's all about the worm wheel and worm gear. One can turn the other, but not the other way around. When one wheel loses traction, both wheels lock and turn together. The Torsen diff is one of my favorite parts of my 95 Miata!
This entire video was "this is a limited slip differential. It works by being a limited slip differential. It has gears."
Thanks
It's a great carrier, if you can find one to fit your diff. Most diffs support a clutch type limited slip, or come with their own special limited slip, like Borg Warner's cone style.
The magic sauce inside my b5s4.. good Ole torsen
Jeeps: We don't negotiate with turns.
That stuff is created by a genius!!
I LOVE IT WHEN SOMETHING GETS EXPLAINED IN A WAY THAT'S EASY TO UNDERSTAND THANKS BRO !!!
Limited slip is not required to turn, cars drove for years without it. And limited slip diff WILL GET YOU STUCK because it does not work off pavement. In the mud it just lets the tire that will spin(do just that spin) while the tire that has grip freezes in place burying the spinning side to the frame.
Don't forget it's acronim: LSD Limited speed differential
The important part you didn't mention:
Normal (open) differentials will send torque to the wheels with the least amount of resistance. That's why in slippery conditions a car can have one wheel spinning, accomplishing nothing, while the other wheel has plenty of grip, but just sits there doing nothing.
Limited-slip differentials fix this in a variety of ways. Some are purely mechanical, some hydromechanical, or electromechanical. The simplest versions (arguably not a differential at all) will apply brakes to the wheels which are slipping.
If you've seen the film "My Cousin Vinnie" you'll probably remember its importance. If you haven't, go watch it! It's hilarious!
Really good.
I guess I will have to finish your explanation
You explained a differential well enough. A basic dif let's the wheels spin at different speeds based on fraction. But what happens if one tires has no traction at all? From a slippery surface like mud. Well. The wheel that is in the mud will receive ALL the power from the engine. Causing one tire to spin on the spot. A limited slip differential is just a differential that does not have this problem. With a "limited slip" differentially it "limits how much your wheels can slip" some 4WD card have an option to lock the dif. Or unlock the dif so when they are out on a muddy track. They won't get bogged as easily because they give both wheels and even amount of Power. Then when they are back on the road they can unlock the dif and let them wheels turn at different speeds again
I hear you, but what I see is that the wheel with less traction is getting all of the power.
I was hoping this would be more in depth. Not because I need the information but because it is fun to watch what is happening inside my diff(92' celica alltrac), there are better videos that show the whole process.
I have a Passat W8 with all wheel drive and it has a Torsten differential in the transmission.
It's so good that you don't need to learn the functioning of everything you use.
Well...and now I know!
At first I thought it was a pencil sharpener
I race go karts with NO differentials, we simply offset our front steering wheels for turns and it combats it without losing speed when your in the apex.
I've been watching so many lego videos I thought it was built out of Legos for the first half of the video
I have a torsen lsd, it's awesome
LSDs are cool tech but an air actuated locking differential is king for off-road.
“It transfers torque to the wheel that needs it.”
Maybe if I was trying to do a burnout…
You were right about the diff allowing different wheel speeds, but you were holding one wheel on your model - which would be the wheel that needs the torque. Instead, the other wheel spun faster.
For traction, you want a locked differential - something where both wheels spin the same no matter what. It’s terrible for cornering, which is why it can be turned on/off in cars made with lockable diffs.
I then read the comment section and face-palmed.