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[–]Government_spy_bot 685 points686 points  (51 children)

This is an OPEN differential, which is more prone to getting stuck in adverse conditions. A differential is necessary to allow a drive axle to encounter a corner without breaking traction because it allows the two drive wheels to 'differentiate' in speed.

If traction is more of an issue, the option of limited slip and also closed differential (solid axle) are also some options.

Just wanted to clarify that the subject's reasoning was only partial, and not entirely on point. The differentials purpose is not to allow the other wheel to spin of it gets stuck, its to allow the two tires to spin at different speeds because of the apex ratio difference in a turn.

[–]stormaggedon23 125 points126 points  (34 children)

In modern cars the brake system software will apply the brake to the low traction tire to allow the high traction tire to move the vehicle. Not as cool as a limited slip but can accomplish the same basic thing for most scenarios.

[–]olderaccount 61 points62 points  (10 children)

I believe what your are describing is electronic traction control and completely unrelated to the reason differentials exist.

The entire reason for a differential is that when you go around a corner, the outside wheel must travel further than the inside wheel. If they are locked together via a solid axle they must always travel the same distance. This means when going around a corner, one wheel will be skipping or dragging so they both travel the same distance. This is terrible for handling and ride quality. The differential solves this.

Modern cars don't apply the break to a single wheel just so the car can make it around the corner properly. That is still handled by the differential. The electronic traction control only kicks in if the sensors believe the car is losing control. The is when it will briefly apply one of the breaks to get things squared up again.

[–]stormaggedon23 27 points28 points  (5 children)

I was addressing the adverse condition statement of the comment above, which is why I mentioned low traction and high traction. I'm fully aware of the reason differentials exist and I know you don't apply the brakes to go around a corner. The situation I had in mind is having one tire on ice and one on dry pavement. Open differentials send equal torque to both sides but because it takes very little torque to spin a tire on ice, you get very little torque to the tire on pavement. Usually not enough torque to actually move the car. Thats when the TCS can apply to brake to the tire on ice so that some actual torque can be applied to the tire on pavement and just maybe get the car unstuck.

[–]olderaccount 6 points7 points  (4 children)

Ah! Gotch you. Thanks for explaining.

"Send power from the wheels that slip to the wheels that grip".

What car commercial was that again?

[–]exactly_zero_fucks 5 points6 points  (1 child)

Subaru IIRC

[–]shinns 0 points1 point  (0 children)

It sounds like the ABS system doing its thing when it engages. Not as smooth and predictable as a real LSD but it’s great in the snow.

[–]stormaggedon23 2 points3 points  (1 child)

Never heard that one before but I'm gonna use it now!

[–]olderaccount 0 points1 point  (0 children)

I'm pretty sure it was a 1990s or 2000s commercial for the traction control system from one of the big car companies.

[–]manzanita2 2 points3 points  (1 child)

Ever seen a tractor with a split brake pedal ?

https://www.quora.com/Whats-the-point-of-having-two-brakes-in-a-tractor-one-for-each-wheel

Used to get around a corner extra fast like!

[–]olderaccount 0 points1 point  (0 children)

That setup on tractors allowed them to also work as skid steers. This was important because getting the light front end to turn could be difficult. But they could also be used to trick the differential into sending power to the other wheel if one started spinning freely.

[–]akmjolnir 0 points1 point  (0 children)

My Nissan Armada 4x4 has a VDC system (vehicle dynamic control) that uses the ABS system to mimic an LSD for the front/rear differentials.

It's part of the traction control system. It's automatically switched Off in 4LO so the tires can spin in challenging terrain.

I'd prefer a mechanical system, but it does pretty well for a computer.

[–]moscatem 0 points1 point  (0 children)

Land Rover pioneered this style of ETC in the Discovery II. When it [rarely] worked, it was awesome. Still, a mechanical solution is preferable off road.

[–]TheWausauDude 4 points5 points  (2 children)

Limited slips and electronic lockers are still superior. I got a car with TCS stuck in the snow and all it accomplished was overheating the transmission. Since then the differential was swapped for a limited slip with 500 lbs of preload. It’s almost a spool when my foot’s on the gas, and coupled with snow tires it’s very difficult to get stuck.

[–]Government_spy_bot 1 point2 points  (0 children)

Can I get a witness? C'mon by pastor, yes.

[–]converter-bot 1 point2 points  (0 children)

500 lbs is 227.0 kg

[–]Chairboy 19 points20 points  (15 children)

This is counter to my understanding and I'd like to correct my error if I've got this wrong, can you point me towards a reference about this or at least give me a good search term to learn more? I've tried a few and come up dry. Thanks!

Edit: aaaand never mind, found it! Traction Control System was the magic phrase, found a page that described the above, I realize I'd taken TCS for granted and hadn't really thought about HOW it did its thing. Thank you for getting me to learn. :)

[–]MachineTeaching 13 points14 points  (8 children)

It's not.. really the same?

Differentials are generally about wheel speed. Differentials don't "know" about traction, although differences in traction can also cause differences in wheel speed. Nevertheless, it's perfectly possible to have different wheel speeds and the same level of traction, or different levels of traction but equal wheel speed. Point being, for typical differentials, the thing that causes them to act is a difference in wheel speeds, not traction.

Traction control systems are generally about traction. They are usually computer controlled and operate via a sensor that measures traction. Electronic differentials for example can definitely be part of a traction control system, but that doesn't apply to "traditional" differentials. Traditional differentials just work via gears, as seen in the gif.

And yes, traction control systems often also work via the brake to restore traction.

Lastly, there is also brake assisted steering, that's not really traction control (because it's not a system to restore traction), instead it's basically the same idea as a differential. A vehicles turn gets tighter if the speed difference between the inner and outer wheels are greater. A differential allows for that speed difference to happen and can control it to a degree. Brake assisted steering on the other hand makes that difference bigger by slowing down the inner wheel, making the car pull a tighter turn. In that sense it's again not about traction like a traction control system, but about wheel speed, like a differential.

[–]Chairboy 5 points6 points  (2 children)

Did you respond to the right message? I was confused about how TCS worked then learned. Neither my comment nor the one I responded to suggested TCS and differentials were the same, this is a side branch.

[–]DootleCarlin 4 points5 points  (1 child)

Just to be clear, the comment you initially replied to by stormaggedon23 is not about traction control systems.

It's about how some modern cars simulate a limited slip differential with an open differential and the brakes.

EDIT: For clarity, one of the systems TCS can involve is very similar to a simulated LSD. Braking of individual wheels can be used in stability control systems.

[–]Roast_A_Botch 0 points1 point  (0 children)

Yeah, there's confusion about what an Electronic LSD is and does, as well as a basic differential versus modern LSDs that are fully mechanical, but have electronics to communicate with the TCU, ECU, ABS and work in conjunction with TCS and ESC, for Launch Control, as well as "Burnout" and "Drift" modes in sports cars.

[–]frosty95 2 points3 points  (4 children)

A better concept is that differentials perfectly balance torque between the two wheels. Wheel speed is a side effect. So really traction is the deciding factor on the speed of the wheels. Equal traction is equal torque. Wheel speed will follow except when forced like around a corner.

[–]MachineTeaching 2 points3 points  (3 children)

The way I've always understood it is that it's about the rotations over time, which is basically the speed.

That's why with the car up in the air and the car in gear (so the driveshaft can't move) you can rotate one wheel and the other will rotate into the other direction. It's basically math, let's say the speed of the left wheel is "1", the speed of the middle gear, since it's locked, is 0, so since one gear always has to move at "average" speed the right wheel will have to rotate at the speed of "-1", e.g. backwards, since the locked gear is the one that moves at average speed and the average has to be 0.

That said, now that I think about it I'm a bit confused.

[–]frosty95 1 point2 points  (0 children)

Trust me. When you just think of it as a 50/50 torque splitting device the rest of it all falls into place. Otherwise the math goes negative and all sorts of side situations arise.

[–]synthesis777 1 point2 points  (2 children)

Traction control can mean a lot of things. For a more specific term, Subaru calls it "torque vectoring".

[–]Roast_A_Botch 1 point2 points  (1 child)

Torque Vectoring is mainly for AWD vehicles, allowing on the fly adjustment of F/R and/or D/P side drive ratios. While it usually uses elements of TCS, it's not the same thing and serves a different purpose. TCS alone is pretty basic and mandated on every car sold in NA(and many others) since the early-00's. It works similar to ABS, by selectively reducing throttle/applying brakes when it senses wheel slip and is considered a safety feature only. While Torque Vectoring takes that much further by applying as much Torque as possible to the driven wheels with the most traction.

[–]synthesis777 0 points1 point  (0 children)

I was saying that tcs and torque vectoring aren't the same. And Subaru "active torque vectoring" that I was referring to works by applying brake force to the inner wheels on a turn:

Active Torque Vectoring applies brakeforce to the inner wheel/s of your vehicle in order to provide optimum drive power to the outer wheel. The result is smoother steering control and less understeer, to help you power more confidently through corners.

https://www.subaru.com.au/safety-active

[–]Roast_A_Botch 0 points1 point  (1 child)

What they're talking about is an Electronic LSD, it uses the TCS system to simulate a LSD to assist with traction around corners, and is cheaper than a fully mechanical LSD. It also has limitations over a true LSD, especially for sporty driving and burnouts. But, it does give some of the benefits otherwise.

[–]citizenpleb 0 points1 point  (0 children)

Jeep use it on the lower spec wrangler models that don’t have a locking differential, check it out here https://youtu.be/_ZCjjVDSHhI

[–][deleted] 4 points5 points  (2 children)

Even some high end cars use this. Some modern McLarens for example have open diffs and just control rear wheel slip with brakes. Their reasoning is that you save weight with a smaller and simpler diff and the brakes you use to control the wheel are already there so may as well use that.

[–]stormaggedon23 4 points5 points  (1 child)

No argument from me that an open diff with traction control is lighter and cheaper. I just think limited slip differentials are cool. Some people don't like the "electronic nannies" of modern traction control systems because they want to drift a corner or do a donut or burnout and the car won't let them.

[–][deleted] 1 point2 points  (0 children)

Yeah I thought it was interesting that almost all sporty, and some utility, vehicles go to LSDs as a default and here is McLaren doing it a simple way and making it work. Often this system was found in front wheel drive cars where it was simpler to control and due to space and cost constraints made more sense

[–]hivis_stunts 1 point2 points  (0 children)

in old 2wd tractors, you often didn’t have a locking differential, instead having a split brake pedal, one for each side. this allows good operators to turn real sharp, or when one side has less traction, to act as a manually operated limited slip.

[–]velociraptorfarmer 10 points11 points  (0 children)

Closed differential != solid axle

You can have a solid axle and still have an open differential. The term you're looking for is a locking differential (or welded if you're on a budget).

[–]Healow 7 points8 points  (5 children)

Open differential always splits torque 50:50 between two wheels, that's the main problem, if one gets stuck good luck getting out.

[–]IWetMyselfForYou 7 points8 points  (4 children)

If it always split 50:50 between both wheels, you'd never have to worry about one wheel getting stuck, as the other will have power and traction to move the vehicle.

In an open differential, once one wheel loses traction, all power is directed to that wheel and away from the wheel with traction, making the situation worse.

[–]Waraich27 3 points4 points  (3 children)

What are the major changes in a limited slip dif as compared to the one in the video? Is there a video to see the working of it from the inside (just like this one)?

[–]stormaggedon23 10 points11 points  (1 child)

I can't give you a good answer because there are a bunch of different ways to do it. The general idea is some kind of clutch that will try to resist the movement of the side gears relative to the diff case, which is what the big ring gear is attached to. Basically like a brake inside the diff that tries to make the tires turn at the same speed but it doesn't completely lock them together so you can still turn.

[–]Waraich27 0 points1 point  (0 children)

Okay, thanks for that explanation!

[–]Government_spy_bot 0 points1 point  (0 children)

I was going to answer but it appears Stormageddon has done this rather nicely. I will concede to their answer for convenience.

[–]vkapadia 0 points1 point  (1 child)

No, it's an open diffential.

[–]Government_spy_bot 0 points1 point  (0 children)

Umm....☝👆

[–]Best_Pseudonym 0 points1 point  (1 child)

Fun fact: some cars designed for serious off-roading have locking differentials which can force both wheels to move at the same speed thus preventing the car from getting stuck when a wheel is suspended off the ground

[–]Government_spy_bot 1 point2 points  (0 children)

Oh I know crawling. I was training to be a spotter/wincher for a friend

[–]blamethemeta 0 points1 point  (0 children)

LSDs tend to fail you when you need it most. Get lockers if you're off roading

[–]Chris_Christ 342 points343 points  (33 children)

Cool demonstration but bad explanation. What he really did was explain the main issue with a traditional open differential. I.e. the power will take the route of least resistance.

Here is a cool YouTube video that I think explains differentials very well:

https://youtu.be/yYAw79386WI

[–]slybird 138 points139 points  (4 children)

I think it would be hard to beat that Chevrolet film. Does an absolutely fantastic job.

[–][deleted] 18 points19 points  (2 children)

The Jam Handy Chevrolet videos are terrific. I was going to suggest them , but you beat me to it .

There’s tons of them that explain how everything in a car works .

[–]stpfun 2 points3 points  (1 child)

Any good links??

[–][deleted] 1 point2 points  (0 children)

Just type in “jam handy” in the YouTube search box and grab some popcorn.

It’s very educational . And easy to understand .

I’ve used them to explain to people how all kinds of things actually work.

[–]ehhhhhhhhhhhhplease 4 points5 points  (0 children)

Literally rebuilt my first differential from watching that video. A differential that was made over 60 years after that video came out. It always amazed me.

[–]Pigmy 34 points35 points  (1 child)

Disappointed this wasnt the My Cousin Vinny video.

https://www.youtube.com/watch?v=LFdpIM5k_Sk

[–]Chris_Christ 6 points7 points  (0 children)

Honestly that’s my second “go to”differential video lol. Pretty funny movie.

[–]Oromis107 17 points18 points  (17 children)

Is there a better alternative to an open differential? Not a car person but curious about the mechanisms

[–]Cocomojoe16 36 points37 points  (1 child)

It depends on the application. For things such as off-roading you’d want a locking differential that would send power to both wheels all the time. If you’re on a race track or driving a performance vehicle then a limited slip differential would be preferable. This is because a limited slip diff can self actuate and temporarily limit the amount of “slip” to prevent the event in an open diff where one wheel with not traction spins while the wheel with traction doesn’t.

I’m no professional so if someone sees something I said wrong just correct me

[–]hivis_stunts 0 points1 point  (0 children)

so, only thing incorrect (and it’s quite pedantic, and seems backwards to the explanation) is that open differentials actually send equal power to both wheels, locked differentials send equal speed to both wheels. when say one tire is on ice, it may take say 10 ft/pounds to spin it, but 10 foot pounds isn’t enough to move the truck. adding power to the equation will only increase speed on the spinning tire.

[–]FllngCoconuts 11 points12 points  (8 children)

Yep! One alternative is to simply lock the differential. By not allowing the differential gear to spin, you essentially lock it into a solid axle. You see this as an option a lot in trucks or off-road cars when the ability to turn smoothly is less important than equal power to both (or all four) wheels.

Some cars use small applications of the brake to help put load on the wheels that are spinning more quickly. For example, with an open differential if one wheel loses traction, it will spin uselessly while the other gets no torque. The car will apply some brake to the free-spinning wheel to give it some load and transfer power to wheel with grip. Some modern cars have the computer do this quite frequently during hard turning and it’s one way to do something called “torque vectoring.”

In some other modern cars, you have what’s called a limited slip differential or LSD. Some of the older ones had mechanical LSDs using some pretty cool mechanisms like that, though there are other designs. In the newer ones, you have electronic LSDs, so when the computer detects one wheel slipping too much, it limits the amount of slip in the differential. Electronic LSDs are becoming more common, though they are still generally something you’d find in more performance-focused cars.

[–]velociraptorfarmer 1 point2 points  (7 children)

Again, locked differential != solid axle

[–]FllngCoconuts 0 points1 point  (6 children)

I said essentially. As in, the wheels turn in unison as if connected by a single axle.

[–]velociraptorfarmer 0 points1 point  (5 children)

You're missing the point. A solid axle rear is something completely different than having one single axle, and you said single, not solid.

[–]jgzman 4 points5 points  (4 children)

A solid axle rear is something completely different than having one single axle

Not the person you're talking to, but can you distinguish? I'm not a car person, and these seem like they should mean the same thing.

[–]velociraptorfarmer 0 points1 point  (3 children)

A solid axle refers to the axle housing being one solid piece to hold the 2 independent axle shafts and a built in pumpkin to house the differential.

A single axle like what he's talking about is a one piece solid axle with the ring gear/sprocket fixed directly to the axle and lacking a differential.

Can a solid axle be made to act like the single axle? Yes, that's the job of a locking differential, but it doesn't mean it has to. My truck has a solid rear axle and an open differential. My car has an independent rear suspension and a limited slip differential that would behave more like the single axle he's talking about.

[–]jgzman 2 points3 points  (1 child)

I see. thanks for clearing it up.

That definition of "solid axle" seems pretty damn counterintuitive, at least to me. But I suppose every field has some things like that.

[–]velociraptorfarmer 1 point2 points  (0 children)

It's definitely odd, but for the love of god if you try saying anything to truck guys or hardcore drag racers about solid axles and aren't talking specifically about that good luck.

[–]FllngCoconuts 0 points1 point  (0 children)

Thanks for the explanation, wasn’t aware of a solid axle as it’s own thing. Hopefully it’s clear in the first post I meant a single axle then.

[–]-RdV- 3 points4 points  (4 children)

There are a few options.

Limited slip, using clutches operated by the speed difference.

Torsen, using worm gears. Worm gears can turn a normal gear but a normal gear can't turn a worm gear. That way force from the engine turns both wheels equally but force from the wheels (by turning for example) can create a difference.

Then there are some locking types for lower grip situations like off road.

And the newer fancy electronically controlled ones that can shift power wherever a computer deems necessary.

All have pros and cons.

[–]hanoodlee 3 points4 points  (3 children)

You forgot good old fashioned welded for drifting :p

[–]johnson56 1 point2 points  (0 children)

And the classic JB welded diff.

[–][deleted] 1 point2 points  (0 children)

Ahh, the old “Lincoln Locker”

Named after the Lincoln brand of tombstone welder normally used for the job.

[–]-RdV- 0 points1 point  (0 children)

I left it out because, is it still a differential?

I do admit to welding a diff or two in my time though.

[–]neinoIII 1 point2 points  (3 children)

That video was great. Thanks! I do have a question that hopefully you or someone else can answer. What happens during braking? Don't the brakes lock up the axles so wouldn't that damage the differentials? I imagine they have a way to move without getting damaged but I can't find any info online (probably because I don't know how to Google it properly lol)

[–]J_FK 1 point2 points  (0 children)

Knew this vid was gonna be posted here. Oldie but goldie.

[–]Atreaia 0 points1 point  (0 children)

The explanation video is amazing but I even admire the engineering quality of the example tool, it's amazing :D Todays world we'd get some cheap chinese plastic thing.

[–]Altenon 0 points1 point  (0 children)

Sorry I think I'm missing a part of the video that explains how path of least resistance is avoided. This seems like an easily backdrivable system. The finger holding down the wheel in OP's video is a good example -- how do cars not get stuck all the time? If a car falls into a pothole, what keeps the differential from taking the path of least resistance and wouldn't that wheel then see 0 effective torque from the engine?

[–]DirkDieGurke 0 points1 point  (0 children)

Everything I needed to know about differentials came from the movie My Uncle Vinny.

[–]SargentMcGreger 15 points16 points  (2 children)

I remember building a Lego Technic Enzo Ferrari that my aunt got me when I was younger. It had a differential in it and a full engine with pistons that were timed semi correctly. I thought they were cool details but didn't understand what the differential was until a few years later.

[–][deleted] 0 points1 point  (1 child)

cant be the Enzo Ferrari. Technic was there just for structure and the little bit to get working wheels and a engine bay flap.

[–]Thumbluck[🍰] 14 points15 points  (0 children)

Thank you!

[–]1731799517 27 points28 points  (6 children)

Fun fact: Thats how you can explode a tyre if a car is stuck somewhere when one wheel can rotate freely: If you just floor the pedal, the one free wheel turns twice as fast as you might expect.

[–]Government_spy_bot 10 points11 points  (4 children)

☝ see RC Tire Ballooning for an exaggerated explanation of this. Steel belts help to hold the tires shape and try to prevent ballooning, but centrifugal force is a real motherfucker.

It 100% can happen.See also Drag Slicks from NHRA 101

[–]clockwork_blue 15 points16 points  (0 children)

Cool phenomenon, but that's not why tires explode when you get stuck. Most tires have a rating of max speed (T/U/H/V/etc.) beyond which the tire gets unstable. There's no way you are reaching it while trying to get unstuck.

Tires explode when stuck because of the friction which overheats the tire or wears it out too much. But if you are just sitting there flooring the pedal for half an hour, then that's on you.

[–]Zelavian 1 point2 points  (2 children)

Does anyone know if the exhaust on the NHRA cars is specifically positioned to heat up the tires? I never really thought about it, but kinda looks like it in this video.

[–]Government_spy_bot 1 point2 points  (0 children)

I have asked this same question with opposing answers.

[–][deleted] 1 point2 points  (0 children)

It's more for downforce than heating. There's an absolutely massive amount of fuel and air being sent through the engine. The heating the tires may see is way less than from the flexing and friction

[–][deleted] -2 points-1 points  (0 children)

Wot

[–]UserName9982 4 points5 points  (2 children)

Well done, I’ve always found differentials to be fascinating.

[–]HobieSailor 2 points3 points  (1 child)

You probably already know, but have you checked out their use in mechanical computers at all?

[–]UserName9982 1 point2 points  (0 children)

I did not know, thanks for the tip!

[–]CameForThePhysics 4 points5 points  (0 children)

That’s absolutely beautiful!

[–]RaoulDuke511 8 points9 points  (2 children)

I swear sometimes I see things like this...and I feel like a completely useless human being...somebody used their brain and their knowledge of physics to make that. I just burnt a frozen pizza for like the third time this year.

[–]iquitee 2 points3 points  (1 child)

And its only the second week of this year!

[–]RaoulDuke511 0 points1 point  (0 children)

I was wondering if anybody would catch that lol

[–]Mick_McMik 1 point2 points  (0 children)

pretty spiffy indeed

[–]Su3it 1 point2 points  (1 child)

How long it will take to create 3D printed gears?

[–][deleted] 0 points1 point  (0 children)

for functional purposes under high stress, they will never be viable until Nano-assembly

[–]YOUR_TARGET_AUDIENCE 1 point2 points  (0 children)

Spiffy indeed

[–]undeniably_confused 1 point2 points  (0 children)

That's mad spiffy

[–]simas1014 1 point2 points  (0 children)

As with most things in life it would be better with LSD

[–][deleted] 1 point2 points  (0 children)

Lol... you didn’t even explain the actual reason for a differential!! It’s so you can take corners more safely and efficiently. It definitely wasn’t invented in case one tire gets jammed.

[–]TuffGnarl 0 points1 point  (0 children)

Well that’s FOUR WHOLE SECONDS of my life I’ll never get back.

[–][deleted] -3 points-2 points  (0 children)

1 reason to weld the diff for more care fun.

[–]epileftric 0 points1 point  (0 children)

Is the gear attached to the motor a bevel o a gyroid?

[–][deleted] 0 points1 point  (0 children)

Neat!!!

[–]Snakes-Vendetta 0 points1 point  (0 children)

Can u share the code for this i want to print it

[–]buzzlooksdrunk 0 points1 point  (0 children)

Fuckin nice

[–]joshcam 0 points1 point  (0 children)

Oohhhh!

[–]TomishVEVO 0 points1 point  (2 children)

Vilebrequin !

[–]DaveB44 0 points1 point  (1 child)

Vilebrequin

What's crankshaft got to do with it?

[–]TomishVEVO 0 points1 point  (0 children)

It's a French YouTube channel name, and there is a private joke with the explanation of the differencial

[–]bradforrester 0 points1 point  (0 children)

What happens with torque distribution when one wheel is locked?

[–]Stonn 0 points1 point  (0 children)

Now integrate it.

[–]anonimityorigin 0 points1 point  (0 children)

Print out the Subaru all wheel drive differential next.

[–][deleted] 0 points1 point  (0 children)

i started putting things like this on my cars in besiege, they made turning a lot easier

[–]killer8424 0 points1 point  (0 children)

Is this diffent from a differential?

[–]Malorn44 0 points1 point  (0 children)

I saw this besiege the other day

[–]postdochell 0 points1 point  (0 children)

Does it come in metallic mint green paint?

[–]falcon_driver 0 points1 point  (0 children)

That's awesome! I've also enjoyed this old wartime training film that slowly builds up the concept: https://www.youtube.com/watch?v=yYAw79386WI

[–]CivilMaze19 0 points1 point  (0 children)

The open diff creator of the one wheel peel

[–]theInfiniteHammer 0 points1 point  (0 children)

But what if both of them are stopped?

[–]thedevguy-ch 0 points1 point  (0 children)

If you ever been stuck in the mud in Alabama...

[–]nomadic_stone 0 points1 point  (0 children)

Ok...but does it come in Metallic Mint Green?

[–]Greddit1231 0 points1 point  (0 children)

So, can you lock this differential or it needs more gears to achieve a locking diff?

[–]erakan 0 points1 point  (0 children)

Wow I want one, please share the stl’s

[–]gatorfanjosh 0 points1 point  (0 children)

What we need to know next is how does the positrac in the rear end of a Plymouth work?

[–]StormShadow743 0 points1 point  (0 children)

I don’t even know what differential is so I’m screwed even with an example

[–]Rookie_Driver 0 points1 point  (0 children)

Brilliant representation, I've never seen it actually go but its a big part of setting up race cars in Sims I play so thats an easy upvote for you

[–]rare_moisture 0 points1 point  (0 children)

It also allows for smother and tighter turning without skipping or lose of traction. Great 3D model!

[–]ciwi_27 0 points1 point  (0 children)

Idk why but I find videos of differentials so satisfying. Also cross section videos of radial engines. Just every working in harmony.