looked for this comment :)))

cheers i missed that!

5wd

TheTallMan35 that's not all. What I dont like is the way you lose fuel economy powering the wheels on all the other cars and trucks

Is there a chart where you can see all these systems compared?

i add 4 spare wheels in the trunk that way i launch faster than anyone 1 second for 0 to 100km/h it works trust me

J.C. I never noticed that......

I know right!

+George PS Mouyios This cracked me up

its only unfortunate. not bad. unfortunate

i laughed harder than i should've at that

lol im not the only one

wb quatro system?

@@Wreckedftfoxy Quattro is the best

+ringindustries My awd system is the best awd system because subaruuuuuu impossibruuuu

+ringindustries aw goddammmit. i saw this comment only after literally commenting exactly this myself 5 seconds ago

+ringindustries which video was it?

+Harzman01 "Which Mustang is Best Mustang" by Regular Car Reviews

+ringindustries My awd is best awd cause low range transfer case. MERICA!!! GOTTA WAR WITH BROTHERS AND I DERR HUNN DER DAAH DER!!!

+Stewart Starling Thanks Stewart! My name's Jason. Unless you were talking to Alex, in which case I take back everything!

+Engineering Explained I think both Alex and Jason are cool.

Wait, who's Jason and who's Alex?

+blabla suqew You.

KaptenFluffen My mind just blew!

Looks more like 3cyl center left engine...

good for left turns. lemme tell ya

seven im dead lol

seven N A S C A R

still providing laughs 4 years on

+TurdFurgeson571 Functional as ever!

so is the whiteboard a limited slip differential?

What you are hearing is commonly referred to as "burbles" and "crackles", AKA "over-run". This occurs when the hot, fast moving gasses rapidly cool and slow down inside the exhaust. Many cars include "flaps" that open and close to restrict the size of the exhaust to eliminate this from happening. This reduces efficiency and power, since you are slowing down the exit speed of the exhaust gasses.

shinzantetsu...I think I'll just stick with a 2 drive system!!! 😣

More like the makings of a great college professor or engineer.

+itzcuzimgreek32 Really just the STI though. Otherwise, Audi Quatro.

*****, I've never seen a head-to-head comparing Subaru Symmetrical AWD with Audi Quattro. I do know that Quattro features torsen differentials whereas Subarus don't (except for the STI).

+itzcuzimgreek32 lol Mitsubishi's is way better, though. Instead of braking the inside wheel in the front, it speeds up the outside wheel.

+logicity1 Just like the WRX STI

Ah, you're right, I was thinking of the WRX

+Ryan Callahan I have a video on the subject, search my channel for GT-R AWD :)

loool i meant Jason xD

Great tip Susan, thanks!

hahahaha cheers from Chile Engineering Explained !

Subaru has so many different setups but I can say the the STI is the only one with three LSDs. I believe the WRX has a center and real LSD and an open front diff. They get worse from there.

WRX and WRX STI is using DCCD. Which is pretty much a viscous coupling.

Garbage section, really down at the bottom of the barrel for awd systems.

They've got 4 setups, the Outback has the best system for daily use. WRX has that near 45/55 split which makes it great since it has a small change in distribution of power. The STI has the best for racing.

really??? XD

+Renato pereira but aren't they crisp? hahaha

I never thought about it until I read your comment. Holy Jesus balls those are some nice markers

+Wtrxprs007able that's what I'm saying haha.

+Zach Willie haha so vibrant much thickness very marker

I'm sure you realise the system is the one applying the brakes, not you....do you?

Ray

Haldex is by far the best AWD , SAAB was one of the inventors.

No need for computers if you use DC motors... Just wire them all in parallel. The slowest motor always draws the most current.

I was thinking the system on the old G Wagon. Your’s is better.

@@robertkesselring Good to know. Then why do almost all EV manufacturers prefer AC motor instead?

Rimac, Nikola, Rivian.

You forgot TL[X], MDX, old generation RDX (the turbo powered version). The RLX is a little different because it's actually just FWD engine with a vectored electric motor for the rear wheels to mimic their usual SH-AWD system. I believe the RLX is closer to a combination of systems that he alludes to near the end of the video.

@@ryanshannon7703 RL had SH-AWD too

@@mackcummy4976 RL was dope. Huge and by todays standards an analog smart phone, considering the plethora of buttons. But, it was dope. A shame the ZDX wasn't able to develop. I really like that sport CUV.

Ron West they are the best acr you can get for the money

Except your average Subaru (WRX & STI discluded) has the first type of open diff AWD system. I own an Outback and was surprised at how poorly it handled snow vs my Lancer Ralliart that is equipped with LSD's. It's a shame that Mitsubishi have effectively killed their awesome AWD system as it is superior to most similarly priced AWD systems, In fact the EVO X is the only non exotic I can think of that has a true torque vectoring system (Subaru cheat by using the brakes on the WRX).

My forester xt is great in the snow

*****

Branko Botic Try an STI in the snow and see if you feel the same way.

Nah, it uses LSD's. But sadly, most newer subarus except the STI has open diffs these days. The old one is better if you have a normal subaru. (And yup, I know I'm bumping an old comment.)

viscous coupling center diff

@@madhatresearcher7995 Only manual Subaru's still have a viscous center diff, Subarus with a CVT have an electronically controlled center diff so that the computer can choose where to direct the torque.

Subaru uses an electronic limited slip center differential and open differentials in the front and rear. They uses the brakes to redirect torque left to right when the computer thinks it necessary. As you can guess after watching the video, it's not the most advanced AWD system, it's advantages are that it's mechanically reliable and relatively inexpensive, which is important for Subaru since AWD is standard in their vehicles. I believe Subaru's advantage over most of their competitors is that they are better at programming their computer on when and where to direct the torque. Torque vectoring is relatively expensive, and so it is mostly found in luxury AWD vehicles, which aren't really who Subaru competes against. Few car buyers are cross shopping Subarus and Land Rovers. The AWD systems in the vehicles Subaru actually competes against are not more advanced.

+David Mudrik It doesn't matter on your car David because your ride lights up all four. LOL

Haha true! Hopefully new tires will help out a bit!

David Mudrik HAHA maybe! That torque is nuts.

+David Mudrik LOL but keep in mind your 2006 still has preload on the center diff and can't go "fully open" like the 2004-2005. Not sure if this is a good thing or not, though, depends on perspective I guess haha (I have a 2005).

jsquared1013​ maybe the case, I always leave it auto anyway lol.

You'll enjoy this! kzfaq.info/get/bejne/nph_ndpp0am-iGg.html

thx, you are the best ;) !

+davetek490 This is a very common misconception. Open diffs do not send torque to the tire with the least resistant. Torque is split 50/50, always. Because an wheel with little resistance spins easily, it doesn't take much torque. Because it doesn't take much torque, the engine doesn't make much torque to put down (it needs resistance, you can give it gas but it will just increase in RPM rather than create more torque - the engine in this case provides the resistance). I have videos in the description explaining this further.

+Engineering Explained This got the concept though to me. The torque is based on engine load! Low resistance = low load = low torque output! By golly, I think I've got it this time!

Engineering Explained I never thought of it that way. Help me understand this: when a FWD car has an open diff, and turns in a circle, the road is accelerating the outside wheel? The diff just allows the speed mismatch? For some reason, I always thought the diff was actively transferring extra force left to right in that instance. Since the outside wheel is easier to turn, I thought the diff was sending more torque there. Something must act on the outside wheel to accelerate it faster than the inside wheel.

Not really, because the center clutch pack engages on slip. There is another awd system for small crossover which has lockable 2 speed center diff which can on loose dirt road power all 4 wheels instantly without waiting for slip first. It's unmatched in segment

IMO.. BMW Xdrive.

Subaru is garbage, they don’t have torque vectoring, active yaw or active center diffs. Mitsubishi SAWC in the evo x is the best in the world.

Audi Quattro uses the Torsen limited slip differential

+faris s Just google the car you're curious about. They'll change from model to model. I don't think there's a common one that is just used in a segment. Heck subaru has like 5 different AWD systems for different cars.

+faris s 4x4 commonly use open differentials - except sports SUVs', like the Range Rover SVR which uses LSDs - and have a lock button/lever. This basically allows optimal traction to get out of mud and tricky situations. I must admit, helped more than once. Coupes: depends on how expensive it is. Most performance orientated coupes use LSD, affordable ones run on open differentials but this is becoming rarer. Hatchbaks: since most of them are FWD, they use Torsen differentials. See, FWD cars are difficult to steer while braking and lack traction when accelerating, so they use one way LSDs' that are open when braking but locked to a certain degree when accelerating. Causes lift-off oversteer (due to the dif opening) and, certainly, climax. Saloons: Open for common ones and LSD for performance oriented vehicles. Supercars/Hypercars: LSD (eg Porsche 996) or torque vectoring (eg Porshe 918), or even Open though extremely rare (McLaren P1 uses an open dif and brakes to create yaw). Please note that some cars have some sort of a yaw control (lancer Evo) or something like a clutch pack to do some sort of torque vectoring (eg Nissan R34 GTR Vspec using ATTESA). It is far from easy to determine which one is the best for AWD, FWD or RWD when considering the price. It all depends on the budget and how the chassis behaves. Basically, we could admit that AWD are best with torque vectoring since they have a lot of traction. FWD are best with LSD Torsen or some kind of open differential when braking, and RWD cars depend on where the engine is. Overall, manufacturers are having a trend on torque vectoring, which is about logic since there is no drawback except the cost. Oh, and it allows to create the best thing on earth to pick up some girls without even using the handbrake: drift modes (watching you, Ford Focus RS!). Anyway with the ludicrous amounts of horsepower you can find nowadays, pure Open differentials have a hard time putting the power down and are being avoided.

Was fixed back in '99 when the EJ25D was discontinued. Newer headgasket issues, generally, occur on 200k+ mile cars that are poorly maintained.

I have a 2008 and the head gaskets leaked oil and 2200 to repair at 66000 Miles. Now has 124000 miles and Subaru says they are leaking oil are in need of replacement again. So I just want you to know your information is flawed. P I also had the 1998 and the head gaskets blew at 135000 miles coolant in the cylinders. Unless Im the only one to have a issue which I seriously doubt. I was assured when the 1998 blew, by SUBARU themselves that the issue with the head gaskets had been resolved. We now have a 2017 outback with the FB engine npw Yea we love the cars and they hold up well mostly. I would appreciate knowing where you received your data from. all 2.5 had issues and the 3.6 and 2.0 were less suseptable as they had closed or semi closed decks 2.5 were open deck blocks.

improved not fixed.

FCFordLord yes I just changed mine xt 2003 after 240.000km on it

NotHarry1000 ı have ej20 xt 2003 ı chnaged gasket 244.000km , Higher temp in ej25 2,5lt means earlier change .Head gasket is problem in turbos due to high performance cause temp rise if you have a little small problem in radiator ,coolent,corrosion lack of antifreeze rust starts and coolinf performance detoriates and finally small temp rise means burning head gasket in subaru. If temp rise in subaru 100 pct headgasket burned and must be changed , subaru temp gauge must be fixed

+ThatGearHead™ Torque vectoring diff's win my vote. Now implementation is a different story. For something that needs low maintenance I'd stick to a torsen. My 3rd gen TL has been bullet proof for years now!

+ThatGearHead™ I have to agree.

dood let the honda dream die sh awd only turns on when it senses the lack of motion so by the time it ingages you probly already hit the ditch or spun out.

Ricardo Salas Lol... What? This isn't a viscous coupled system. Do more research on AWD implementations. You're way off base.

+vidurc dood sh awd is shit read up on some hondon't race history that over weight slow ass older than the 80s drive is useless it only activates when it senses slip the rest of the time its fwd at its finest this is one of the f1 tech from da 80s of hondon't that should have stayd on the track its badly implemented and one of the main resons why lemons bands the use of awd past the 25mph mark what hondon't needs to do is finally relaese AI-vtech thats the only thing that will save the brand from becoming a releck it was promissed sins 2006 and nothing wtf also bring back the prelude the best chasis ever made bb1.

For the price, yes, but Land Rovers is just better, you get what you pay for.

Potato Cat Land Rover is 4wd, so yes. But this was about AWD.

Not even close

Svein-Harald Ribland Land Rover is all wheel drive, it uses traction control rather than locking differentials

+Odd Arne Roll tesla model S and X with dual motor use one open diff per motor and use brakes to emulate lsd (marketed as so). resuming its open diff with a poor mans traction control (real life). its the first setup explained in the video without the center diff.

+Odd Arne Roll Electric motors are great, but batteries are not. They are heavy, expensive, inefficient, toxic, lose capacity fast, are short on capacity and get more flammable as they are used. Once they fix these issues and my smart phone lasts two weeks on a charge without using the same energy as my refrigerator. Then the electric motor will become an almost complete replacement for engines. 3D batteries show some promise.

+elpidiovaldez4ever actually they are already there, but politics is still playing ball with fossils.

+elpidiovaldez4ever --> Mercedes Benz SLS Electric Drive! It has 4 electric motors with torque vectoring. People Dont want to hear it, but it is far more advanced than the Tesla.

+elpidiovaldez4ever That would be a lot more expensive and it gives you 4 points of failure vs the single engine. If one of the electric motors locks up then it renders the car almost immovable.

+akrazyassho 4 points of failure? a single 4 cyl engine have more movable parts than 20 electric motors combined. You said if one of the motors locks up it renders the car almost immovable then what about if one single cylinder from the engine do the same, or maybe the transmission fails, or the differential, or maybe a more complex AWD system. You have WAY more points of failure in an regular car, they are just pretty reliable because we have been making them for more than 100 years.

+akrazyassho electric motors are extremely reliable. In factories they are doing their job 24/7 for 10 years and more. when it comes to reliability, the batteries are the bigger problem.

+tonytypes Trade it for a Subaru 😀

yogaexe I would but Subaru doesn't have a 7 seater or a 3rd row...

+tonytypes If you have a 2003-2009 4WD 4Runner you have all the good stuff. Also the 4WD 2010 to present Limited 4Runner has the good stuff.

+tonytypes Get a 4runner AWD and you'll have one of the best.

I don't know what you have but my Toyota has one of the best systems. Open front axle, lockable centre diff and LSD rear ('06 Prado)

yuset6 How’s that 2018 EVO AWD work? 😂😂😂😂😂😂😂😂😂😂😂

krispewkreme Wait a min, take that back, u own a subie enough said ahaha. Good luck with them ringlands blowing up.

Nice Try well it’s a WRX. So ringlands aren’t an issue with the FA20

krispewkreme Lmao, 4b11 > fa20, 4g63 > ej25 it’s as simply as that my dude.

Nice Try yeah I know it is. Subaru should’ve partnered with Mitsubishi and shared the endings

I'm surprised he didn't mention it. I was hoping to hear some brand names which uses what

So tell me an awd with locked diff then or with diff lockers even.. Or why he says open diff means power is split evenly between wheels?

+Cristian Rodriguez right, and usually the center diff is really just and open diff and part of the transaxle, like a fwd transaxle with a driveshaft. you don't find many cars or trucks that are awd with two drive shafts like his pictures very often. that is really how most 4wd setups are. furthermore, how do you make a video called 'What Is The Best AWD System?' and then draw 0 conclusions at the end? he doesn't even really explain the differences between mechanical and viscous diffs and advantages and disadvantages, etc.. just sort of glosses over that stuff. this is like a basic explanation of the different kinds of awd/4wd setups but nothing about how they are actually implemented. i stand by what i said earlier, this is not a good explanation.

Actually, he's right. Open diffs deliver the same torque to every wheel. Like he said, the reason why you don't get anywhere when one wheel is in the air is because there's so little torque involved spinning a wheel without resistance that the other wheels won't get enough torque to get you moving. He also explains the trick with the brakes. In short: Open diff = Same torque on every wheel, different speeds Locked diff = Same speed on every wheel, but varying torque clutch LSD = Always delivers torque to the slower wheel until the torque that overpowers the clutch is reached, then allows slip visco LSD = Delivers torque to the slower wheel based on the difference in speed

lmao

i agree, these were pictures of various 4wd systems. a diagram of an AWD system would've had the motor at one end of the drivetrain or the other and he should've mentioned the torque steer created from having one shorter axle in the FWD end of things

I read through the comments because that is exactly what I was going to say.

Yeah that is a good system, but a few disadvantages are you will be limited in the amount of torque a single wheel can receive; In some other systems a single wheel can receive full torque. You can obviously overpower the motors for the application, but that comes with a weight disadvantage. Still one of the best systems for many reasons as you are probably aware.

👍 And with torque vectoring.

@@samantoniak1657 how are you limited aside from the output of the motor? Anyone using this setup is not lacking power.

The Gifted I would have agreed before ~2005, but now the Subaru package is priced correctly. Atessa (Nissan) hardly on any models, has a reduced VDC package (abs+) for regular cars. It's all the same now, get a traditional awd and not the car-based platforms. Body on frame ftw.

I'm with you. Quattro is the best awd ever

LOL Quattro only mimics Torque Vectoring by using breaks. Mitsubishi S-AWC is the best. Engineering Explained - "Mitsubishi Evolution X - How The AWD System Works (S-AWC, ACD, AYC)"

Jay Edlington Price is not just for drive train!! I lived in japan for 9 years and even Japanese Subaru driver says they want AUDI QUATTRO I love Audi but I also like Subaru!!

Its Mitsubishi S-AWC with YAW as #1 and then Audi #2, then whoever else. Anybody saying Subaru needs to get out of the house and sell those junk ass cars.

3:23 *

Someone had to do it.

+Engineering Explained bro do you even awd?

tiredrummertube nah, Land Rover always superior

Audi Quattro can do that as well. Even in a 3yr old SQ5. The newer system is even better as it has torque vectoring in the rear now.

tiredrummertube h

Real life test in Russia showed Subaru with open diffs failed at this, the only family car that got out with low efford when only one wheel had traction was a Volvo AWD.

ms3er, i believe the SQ5 has Sports Differential, you always have power to both rear wheels and 1 front, then the esc only need to brake down one front wheel to get good grip. I currently drive an Audi Quattro with open diffs and is 100% convinced that my next Quattro must have Sports Differential.

Except your average Subaru (WRX & STI discluded) has the first type of open diff AWD system. I own an Outback and was surprised at how poorly it handled snow vs my Lancer Ralliart that is equipped with LSD's. It's a shame that Mitsubishi have effectively killed their awesome AWD system as it is superior to most similarly priced AWD systems, In fact the EVO X is the only non exotic I can think of that has a true torque vectoring system (Subaru cheat by using the brakes on the WRX).

No. Subaru does not have the best AWD, that would be the Mercedes 4Matic.

CaptHollister wtf no

Mitsubishi S-AWC is the best. Engineering Explained - "Mitsubishi Evolution X - How The AWD System Works (S-AWC, ACD, AYC)"

Subaru has a good awd system and so does Audi. Mercedes 4matic and BMW's Xdrive are good also. The way to truly determine what awd system is better? Put them all in winter and equip each car with winter tires. The same tires. Torque vectoring in my opinion is the best. Audi has it!