How Subaru AWD Works

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  • čas přidán 10. 12. 2023
  • Here’s how Subaru’s symmetrical AWD system works!
    Subaru has been known for their AWD systems for decades. It is a full time AWD system that drives all four wheels of the vehicle. There are a few variants, including having a center differential based on a viscous coupling, a multi-plate clutch pack, a planetary gearset with a clutch lockup and a limited slip differential. In this video, we teardown the center differential with a planetary gearset from a 5 speed automatic transmission out of a 2005 Subaru Outback.
    Power is sent from the boxer engine to the 5 speed automatic transmission, which changes gear ratios. At the tail end, a center differential splits power between the sun gear going to the rear tail shaft, and the planet carrier, which goes through a countershaft to the front differential. Through gearing, different torque splits can be applied to each axle.
    The front differential is located within the transmission bell housing, below the input shaft. This means the front has equal length axles, and combined with the symmetrically oriented boxer engine, lends to Subaru’s “symmetrical” AWD moniker. This layout limits torque steer, however it puts the heavy engine weight ahead of the front axles, unlike a longitudally mounted RWD based AWD system where the front differential is beside the oil pan, underneath the engine.
    Overall the Subaru AWD system and the 5 speed automatic seems to be a very robust system, with this transmission showing very little wear after 300,000km and 17 years of use. From a maintenance perspective, this transmission does away with an external transfer case, prop shaft and differential, instead choosing to have all those functions well integrated into the transmission assembly.
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Komentáře • 500

  • @DESTRIAZ
    @DESTRIAZ Před 6 měsíci +180

    For 300km that trans is in pretty damn good condition. But yeah you should also do a tear down of the cvt. Subarus have some pretty solid ones and I’d love to see a rip down of one.

    • @speedkar99
      @speedkar99  Před 6 měsíci +37

      I'd love to see one too!

    • @vipervidsgamingplus5723
      @vipervidsgamingplus5723 Před 5 měsíci +5

      It sucks to think that cvts are usually weaker than a standard geared transmission.

    • @DESTRIAZ
      @DESTRIAZ Před 5 měsíci +9

      @@vipervidsgamingplus5723 i mean logically speaking, one can clearly see how a belt driven pulley is weaker than gear on gear and clutches

    • @shakalpb1164
      @shakalpb1164 Před 5 měsíci +12

      Seems to be a good CVT Transmission, my dad has a 2019 Outback.
      Except the very homosexual „fake shifting“ its very good

    • @DESTRIAZ
      @DESTRIAZ Před 5 měsíci +6

      @@shakalpb1164 yeah thats one thing i dislike with all companies that are using cvt’s. The fake shift mimicking. Just let it be a cvt, everyone already knows it is so let it hold the high revs and push power

  • @sproutpits
    @sproutpits Před 6 měsíci +61

    I've been into Subarus for 20+ years, and this is the best teardown of a Subaru transmission I've ever seen. Would love to see an STI transmission, or at least the front diff.

  • @zennor_man
    @zennor_man Před 6 měsíci +100

    An incredible piece of engineering! Kudos to you for your understanding of how it works & your excellent explanation

    • @speedkar99
      @speedkar99  Před 6 měsíci +19

      Thanks. It took me a few days but I studied it a bit and tried to understand it. I love appreciating these wonders of manufacturing and engineering.

    • @davewhitby4750
      @davewhitby4750 Před 5 měsíci

      I love you too

    • @18890426
      @18890426 Před 4 měsíci

      @@speedkar99 how did you study it?

    • @chuckwalla2967
      @chuckwalla2967 Před měsícem +1

      @@18890426 Other youtube videos.

  • @mikezerker6925
    @mikezerker6925 Před 6 měsíci +25

    It’s amazing the amount of engineering that must go into designing transmissions like these! Just the tear down with all those clutches makes my head spin!

    • @quyle9483
      @quyle9483 Před 6 měsíci +1

      The base design is by nissan. Alot of the parts interchange into the older nissan pathfinder transmission.

    • @speedkar99
      @speedkar99  Před 6 měsíci +3

      I agree. Manufacturing and engineering! Then everything gets taken for granted.

  • @rohanlg790
    @rohanlg790 Před 6 měsíci +4

    From someone who’s driven Subarus all their life and now drives a Mitsubishi Triton for Work , let me tell you I have taken Subarus traction and control on the road, especially in wet weather for granted!!!!! These new two wheel drives, front wheel drive or rear wheel drive, on a hill slight bit of rain, and you just slide everywhere. Subarus control is unprecedented, taking into account the small increase in fuel consumption, and lack of being able to switch between two wheel and four wheel. They’re amazing

  • @wesfields9322
    @wesfields9322 Před 5 měsíci +11

    Subaru engineering on their drivetrain system is top of line. What their cars are capable of is simply incredible. Another well made Japanese based product

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Agreed. Quite the feat here

    • @MrBillDaBear
      @MrBillDaBear Před 5 měsíci

      Just wish they put the same effort into their motors :(

    • @rienkhoek4169
      @rienkhoek4169 Před 4 měsíci

      You probably didn't own a SVX 😅

    • @brandonsmith3447
      @brandonsmith3447 Před 4 měsíci

      Yeah sure…that EJ sure had a lot of thought put into maximizing reliability and durability…NOT!
      Garbaggio, hot steamy piles of it. Literally. 😊

  • @the.squidd
    @the.squidd Před 5 měsíci +4

    Came for the info, stayed for the insane sound of the impact wrench edited together quickly.

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Glad you enjoyed it. It's very tedious to edit

    • @nairb2
      @nairb2 Před 4 měsíci +1

      I love your videos! Are you working on a Subaru one? 👀

    • @the.squidd
      @the.squidd Před 4 měsíci

      Soon enough! @@nairb2

    • @GregoryGlessnerViolin
      @GregoryGlessnerViolin Před 4 měsíci

      Aging Wheels has some great impact/drill edits too.

  • @xlefty
    @xlefty Před 6 měsíci +32

    Subaru AT VTD system is pretty ingenious. I recall when I owned my Impreza I could feel torque shifting between the front and rear axle when I was driving on a snowy frozen lake. Cool stuff.

    • @speedkar99
      @speedkar99  Před 6 měsíci +6

      That's cool! From what I understand the torque split isn't that different between the front and rear wheels, probably 40/60. Interesting that you could even feel that much.

    • @DBravo29er
      @DBravo29er Před 6 měsíci +3

      @@speedkar99It's actually 45F/55R. Just like in a WRX. That's actually a Torsen center diff.

    • @justicethegsd1567
      @justicethegsd1567 Před 5 měsíci +1

      You should try Acuras SH-AWD, that system really transfers power between the wheels.

    • @BMW_Z4idiot
      @BMW_Z4idiot Před 5 měsíci +1

      got big balls eh to drive on a frozen lake

    • @xlefty
      @xlefty Před 5 měsíci

      @@BMW_Z4idiot thanks sir! Got an old video on my channel of it

  • @saultube44
    @saultube44 Před 6 měsíci +10

    Dang, great video explaining this complicated Subaru AWD Engine; what a beauty, so that's why they're so good on rough terrain, and durable and expensive

    • @speedkar99
      @speedkar99  Před 6 měsíci +2

      It sure is a touch setup. I like it

    • @saultube44
      @saultube44 Před 6 měsíci

      @@speedkar99 Really Well designed, the only that I don't like, is the price, but I guess it's worth it. This is for Wagons/SUVs right, not cars/hatchbacks?

    • @angelolagussa1312
      @angelolagussa1312 Před 6 měsíci

      @@saultube44Afaik they suvs are just lifted crossover wagon versions of their sedans?

    • @saultube44
      @saultube44 Před 6 měsíci

      @@angelolagussa1312 AFAUK, until you know, your speculations are of no relevance to me

    • @NATA5II
      @NATA5II Před 5 měsíci

      @@saultube44dunno if it’s exactly the same but all Subarus have this AWD system.

  • @adey88splace
    @adey88splace Před 6 měsíci +23

    Watching this begs the question: Who thought this all up and made it work? Fascinating. Thank you.

    • @speedkar99
      @speedkar99  Před 6 měsíci +25

      I'm sure the engineers started with something much simpler and then just kept adding onto it.

    • @dmytrotarasov9477
      @dmytrotarasov9477 Před 6 měsíci +2

      ​@speedkar99 same as computers. Those are on the different level of complexity, but you can still understand the basic architecture and how stuff works.

    • @vihreelinja4743
      @vihreelinja4743 Před 5 měsíci +2

      Mr Subaru.

  • @jaronshelton4124
    @jaronshelton4124 Před 6 měsíci +5

    Thank you for this explanation of the basic automatic transmission. You made it very easy to understand. Best of CZcams 100%

  • @jonnyduncan7056
    @jonnyduncan7056 Před 6 měsíci +9

    Seriously complicated technology and your knowledge is amazing too. Keep up the streams, I really look forward to them. Cheers from UK..

    • @speedkar99
      @speedkar99  Před 6 měsíci +2

      Thanks. I'm sure it started alot simpler and they just kept adding onto it.

  • @marcoquiroz3558
    @marcoquiroz3558 Před 5 měsíci +2

    This video is fantastic! Thanks man! Nice pace, no awkward pauses or silent streaks, very well explained and very entertaining.

  • @joseavila2384
    @joseavila2384 Před 5 měsíci

    You are expert in your clear and perfect explanation of the planetary gears, hydraulic and solenoid works. Thank you.

  • @n0valyfeyo115
    @n0valyfeyo115 Před 6 měsíci +6

    You Sir, are magnificent, And your videos are about as in-depth as it possibly gets.
    thank you soo much for giving me the knowledge of the automotive world.

    • @speedkar99
      @speedkar99  Před 6 měsíci

      You are welcome! The best way to learn is to take something apart.

  • @kumarsonu4848
    @kumarsonu4848 Před měsícem

    Thank you for taking the time & making a video full of knowledge for everyone curious out there :)

  • @EdgarMachuca
    @EdgarMachuca Před 4 měsíci +6

    Meanwhile in an alternative universe a dentist is giving a lecture with a wrench.

  • @jimralston4789
    @jimralston4789 Před 3 měsíci +1

    Just came here because I was getting torque converter codes on my '13 Crosstrek and wanted to understand the whole transmission system better before I took it in. Thanks so much for your breakdown and explanation. This video was amazingly helpful to get a little education and I feel I will definitely be to better understand what the service mechanic tells me about the issue I'm having.

    • @speedkar99
      @speedkar99  Před 3 měsíci

      You are welcome. Hope you solve the issue.

  • @avengera7287
    @avengera7287 Před 5 měsíci +1

    You are the best teacher and no equal to you.

  • @OutsideTheTargetDemographic
    @OutsideTheTargetDemographic Před 6 měsíci +8

    Pumped for the Subaru content! Let's GOOOOOO!

    • @speedkar99
      @speedkar99  Před 6 měsíci +3

      No problem. I got an H6 Engine teardown and a differential video from this Outback coming soon.

  • @WolfmanDude
    @WolfmanDude Před 6 měsíci +4

    That valve body thing looks a-maze-ing inside!

  • @casshgetterceo
    @casshgetterceo Před 5 měsíci

    Thank you for making this! I have been looking for a demonstration of these things for the longest time ever!

  • @mackfar27
    @mackfar27 Před měsícem +1

    A lot of thought went into the engineering and design of this transmission. A lot. Makes me appreciate the amount of planning and execution to make all this happen in one unit. Integrating the front differential with the transmission makes perfect sense and saves space too.
    The next time I see a Subaru on the road. I will go out of my way to smile and wave at the owner because quite frankly they absolutely deserve it.

  • @trueAK
    @trueAK Před 5 měsíci

    G’day Sir! I salute you for your teardown explanation.. I am
    Into old Toyotas but man this is really interesting stuff and your explanation is crystal clear! Subaru’s awd is really an engineering marvel!

  • @ronnydiederich6081
    @ronnydiederich6081 Před 5 měsíci

    Impressive description throughout the tear down. You have a gift for teaching!

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Glad you could learn something new! Thanks

  • @danmurad8080
    @danmurad8080 Před 5 měsíci +2

    I like how you respond to every comment. ❤
    Love from South Denver Subaru Club

  • @beograd07
    @beograd07 Před 6 měsíci +4

    Amazing, how engineering mind comes to these ideas/designs, then even more amazing is how the production is quickly designed to make the parts in volumes from the drawings to the tooling and most amazing is how in a few years a completely new model gearboxes are out and all starts almost from the scratch. But one thing I am sure is you can never put it back together again (11:41).
    Very nice presentation (as always) and showing how we take things for granted. When the average person buys the car, get the keys and starts the engine the last thing on his/her mind is the complexity of parts that allows us to drive it the way it is designed for.
    Your videos will always change the way we look at the car machinery after watching them. There is an old Chinese proverb from 500 BC (maybe philosopher Confucius?): “I hear I forget, I see I remember, I do I understand.” Well your videos are the bridge between see and do. Not only we see it but almost like as we did it ourselves. But not only that, many times you through into your videos some facts from statistics or experiences you will not find in manuals especially when you talk about good or bad things in design or manufacturing.
    So thanks for doing these videos and sharing with everyone. I hope you get enough financial support to continue doing what you are doing but even more for your wife and brother. I hope they will never run out of money for their new clothes and underwear. And toothbrush.

    • @geoffedwards189
      @geoffedwards189 Před 6 měsíci +1

      Well said! I agree 100%

    • @speedkar99
      @speedkar99  Před 6 měsíci +1

      I am very thankful for your feedback. I'm glad that people can benefit, just as I do when I learn as I tear things down. I didn't learn any of this in engineering school.

  • @brandonsmith3447
    @brandonsmith3447 Před 4 měsíci +1

    Que paso guey.
    Another extremely thorough and easy to digest video.
    Big fan bro. 💪🏼

  • @Ukrainian_Matchstick
    @Ukrainian_Matchstick Před 6 měsíci +7

    I hope you gonna lay your hands on subaru Lineatronic CVT some time in the future. Its almost 14 yrs old now and should hit junkyards soon.

    • @speedkar99
      @speedkar99  Před 6 měsíci +3

      I wish it was that easy. Even if they were there at this age, junkyard transmissions are like $300 after core plus I gotta pull it.

  • @kristianhermann5971
    @kristianhermann5971 Před 6 měsíci +3

    Awesome teardown and explanation 👌

  • @JohnForTheWin
    @JohnForTheWin Před 5 měsíci +1

    So cool to actually see all the parts. I love it!

  • @Iowa599
    @Iowa599 Před 6 měsíci +8

    The valve body is (literally) an analog mechanical computer.

    • @speedkar99
      @speedkar99  Před 6 měsíci +3

      Yep! Except it's electronically controlled with solenoids.

    • @LegoDork
      @LegoDork Před 6 měsíci

      Controlled by a (literaly) digital computer. @@speedkar99

  • @BSOX7077
    @BSOX7077 Před 5 měsíci +1

    Just stumbled upon this video , absolutely fascinating ! I don’t even own a Subaru and I rewatched it twice 😂

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Thanks..glad you appreciate and can learn something new!

  • @dancarter482
    @dancarter482 Před 3 měsíci

    _Now to get it back together ready for a 7am start tomorrow!_

  • @juerbert1
    @juerbert1 Před 5 měsíci

    Wow, you are incredibly fast !
    You're an excellent teacher !

  • @1cnfour349
    @1cnfour349 Před 5 měsíci +1

    Excellent explanation!

  • @jamesprice1549
    @jamesprice1549 Před 6 měsíci +5

    Loved it! Thanks for going to all that trouble. Hope it pays off for you.

    • @speedkar99
      @speedkar99  Před 6 měsíci +2

      You are welcome! I hope so, as long as people learn something new!

  • @paulevans3827
    @paulevans3827 Před 6 měsíci +1

    I’ve owned Subaru outback for years I think they’re the best car ever thank you for this video not that I am that capable but I often wondered how it all worked with the gearbox thank you very much indeed you’re a clever man😊

    • @speedkar99
      @speedkar99  Před 6 měsíci

      You are welcome. I learn by taking things apart just like this.

  • @Devo491
    @Devo491 Před 4 měsíci

    Great vid!
    If I ever have the misfortune to use the wealth of information, I'll def come back!
    The best itip I got out of this was the extended socket to avoid the mess when removing the oil drain plug.
    Thank you!

  • @forester_overland_nz
    @forester_overland_nz Před 5 měsíci +1

    Thank you for making this video!

  • @torkrench
    @torkrench Před 5 měsíci

    Great vid, clutches & steels, bands wrap around drums and carriers

    • @speedkar99
      @speedkar99  Před 5 měsíci

      This one had no bands and drums

  • @jkeelsnc
    @jkeelsnc Před 3 měsíci +1

    That one tiny little parking pall is a good reason not to rely on it alone to park your car (yes I know it locks the gearset as well). A parking brake should be set in N and then take your foot off the brake to let the car lurch and rest on the parking brake before finishing the shift into P. Remember to set the parking brake tighter and harder on hills so the car won’t roll forward slowly while the brake is set. You might have to tighten it to hold the car before shifting to P. It also prevents stress on the gearbox by not having the weight of the car resting on the transmission while in P. Of course, this is especially true when parking on a hill. Don’t forget to turn your wheels toward the curb on a hill. If it is a manual car put the gearbox in 1 for parking if the back of the car is pointed down hill or R if the front of the car is pointed down hill. Still make sure the car is resting on the parking brake alone before you put the lever in R or 1.

    • @speedkar99
      @speedkar99  Před 3 měsíci

      I am guilty of not practising what I preach with the parking brake.

  • @countdown2xstacy
    @countdown2xstacy Před 6 měsíci +2

    This guy is brilliant.
    Thanks !

  • @BennyJay3
    @BennyJay3 Před 6 měsíci +5

    "This is basically an exploded view" 😂😂😂

  • @Moccimew
    @Moccimew Před 6 měsíci +1

    did he just say ez clap, didnt know you were chill like that

    • @speedkar99
      @speedkar99  Před 6 měsíci

      Yeah boy! I'm not that professional around the home lol

  • @menom7
    @menom7 Před 6 měsíci +2

    As always,LOVE this video Brotha!!! Along with your detailed explanation and showings of everything!!! Great video!!! : >)

  • @olspanner
    @olspanner Před 6 měsíci +1

    Excellent video, thanks for sharing.

  • @avsti
    @avsti Před 6 měsíci +11

    Great video! Awesome to see the inside of the valve body. First time seeing the combination planetary gearset + clutch for me. I am more familiar with the 4EAT which IIRC are full-time FWD with a clutch pack that can send some power to the rear (or fully lock like a transfer case).

    • @speedkar99
      @speedkar99  Před 6 měsíci +3

      It sure was interesting to dive in and see how it works! This is such old technology but I can learn alot.

    • @niuhuskieguy
      @niuhuskieguy Před 6 měsíci +1

      There really isn't much difference between the 4EAT and 5EAT VTD system other than the added planetary gearset for the rear bias.

    • @avsti
      @avsti Před 6 měsíci +1

      @@niuhuskieguy True! But with a VTD gearset, the car can never enter a 'FWD-only' mode, correct?

    • @IvanAtThe555
      @IvanAtThe555 Před 5 měsíci +1

      @@avsti Correct. If the clutch packs aren't active, the system will be like a basic all time 4x4 with centre diff. Much closer to the manual transmissions than the 4EAT.

  • @deejay4837
    @deejay4837 Před 4 měsíci

    Transmissions are crazy sophisticated to me....let alone AWD systems.

  • @FuJiNF
    @FuJiNF Před měsícem +1

    Not often you see a Subaru 5EAT taken apart. I wished they ran a 4.111FD instead. I also wished Subaru put the VTD center diff as standar across the model line up. It's a much better AWD system. Your average non-car person wouldn't know the difference between the multiplate transfer clutch VS this VTD center diff. Awesome video!

    • @speedkar99
      @speedkar99  Před měsícem +1

      Thanks. These don't fail too much that's why they aren't apart

  • @jinejujutsu3714
    @jinejujutsu3714 Před 5 měsíci

    That was awesome!

  • @teamawesome2171
    @teamawesome2171 Před 6 měsíci +2

    Interesting concept. Thanks for sharing...

  • @kalebcalrow5556
    @kalebcalrow5556 Před 5 měsíci

    Incredible video and explanation, had 6 Subarus manual and autos now. Love my 5spd AT behind the flat 6, incredible engineering. If you have a Subaru I highly recommend finding a local Subie specialist to work on it rather than many other general mechanics.

    • @speedkar99
      @speedkar99  Před 5 měsíci

      They seem easy enough to work on by anyone, except all these rusty fasteners.

  • @risk_immersed
    @risk_immersed Před 5 měsíci

    Very well done... ty for this.

  • @E85_STI
    @E85_STI Před 5 měsíci +1

    The STI drivetrain is very strong and it’s a stock trans and all that. I’m throwing over 600 ft lbs at it and it’s holding well.

  • @dunklematerie3990
    @dunklematerie3990 Před 4 měsíci

    1:39 i thought it was funny how you quickly ended your sentence to note how cool it looks. i feel the same way lol

  • @legass420
    @legass420 Před 6 měsíci +3

    Love your videos of pulling these things apart! If you ever get your hands on a subaru dual-range 5 speed manual, I'd love to see a vid on that!

    • @2Str0k3
      @2Str0k3 Před 6 měsíci +2

      Hell yes. I tried the low range on my Impreza just once and didnt see any point in it. The gear reduction isnt significant in any way useful. I've now driven in winter conditions for a few months and it's "awd" does what it should. Its a hawkeye and that has mechanical 4wd. The 2.0R is plenty for winter time unless you really need to be ken block which you dont really have to or can handle.

    • @speedkar99
      @speedkar99  Před 6 měsíci

      That would be cool, I never knew they had low gearing.

  • @mullayho1759
    @mullayho1759 Před 5 měsíci

    Good editing

  • @AJ-qn6gd
    @AJ-qn6gd Před 6 měsíci +2

    As it says in a Haynes manual, reassembly is the reverse of the disassembly procedure 👍🏻🇬🇧

  • @user-fy1id7ph5d
    @user-fy1id7ph5d Před 6 měsíci +1

    Very good, thanks

  • @ilham_faiz9283
    @ilham_faiz9283 Před 4 měsíci

    Amazing explanation... subie is unique

  • @shannonharris2816
    @shannonharris2816 Před 4 měsíci

    Cool vid. Man

  • @rzbrzotrz
    @rzbrzotrz Před 5 měsíci +1

    I am a bit technical. But not even close enough to fully understand how all this system of levers, gears, clutches... works. Still, I drive a Forester. So thank you so much for the video!

  • @geoffedwards189
    @geoffedwards189 Před 6 měsíci +2

    Amazing engineering. Thanks for this video and your explanation. Now I must clean up the wall behind me from everything that went WAY over my head. 🤣😂

    • @speedkar99
      @speedkar99  Před 6 měsíci

      I'm glad you learned something, as I did too!

  • @GlycerinZ
    @GlycerinZ Před 6 měsíci +2

    my subaru has a manual transmission, its very fun in the snow

  • @patricksmith3948
    @patricksmith3948 Před 3 měsíci +1

    The trick to cutting with a cordless grinder is to use the thinnest cutoff wheel you can find. 1/16” or 1/32” works well. But no matter what they are power hungry.

    • @speedkar99
      @speedkar99  Před 3 měsíci

      Yeah that's why I'm sticking with the corded grinder. The cordless one is for filing my toe nails 🤣

  • @user-tr6fw8yo2t
    @user-tr6fw8yo2t Před 5 měsíci

    awesome video.

  • @DBravo29er
    @DBravo29er Před 6 měsíci +3

    5EAT with the VTD system. It's actually a WRX AWD system with no adjustment. That clutch pack in the rear by the *Torsen* center diff is actually to alter the torque split from 45F/55R to about 50/50. Even if it wears out completely, you still have 45F/55R.

    • @speedkar99
      @speedkar99  Před 6 měsíci +4

      Yes it's 45/55.
      however, I don't understand how this is a torsen differential I don't see any worm gears

    • @FuJiNF
      @FuJiNF Před měsícem +1

      The 2015+ WRX CVT uses this style center diff, not the 5spd nor split case WRX 6spd manual. The VTD center diff is actually a Planetary Gear differential. A Torsen would apply friction to limit slip. The VTD clutch pack limits the slip.

  • @hussin_zadeh
    @hussin_zadeh Před 5 měsíci

    Thanks a lot brother 👑

  • @sjb2471
    @sjb2471 Před 6 měsíci +2

    That IS a nice, thick, beefy shaft!

  • @vladdutz20
    @vladdutz20 Před 5 měsíci +1

    I find the variety of differential and transfer case types to be extremely interesting.
    Plated diffs with electromechanical control, or electrohidraulic, or electromagnetic, or gerotor pump, geared lsd's, center diffs for transverse engines, torque vectoring diffs with or without spider gears and planetary gearsets
    This VTD subaru is one of their finest, at first it was viscous, later it switched to electro hydraulic.
    Lexus GS has a similar system before 2007, with planetary open diff with plates, after 2007 they switched to a torsen C fully mechanical diff

  • @EnergySeeker
    @EnergySeeker Před 6 měsíci +1

    very nice as usual thanks

  • @stevohmelike
    @stevohmelike Před 4 měsíci

    Outstanding

  • @Dustin_the_wind
    @Dustin_the_wind Před 6 měsíci +1

    Appreciate you, man.

  • @ova578
    @ova578 Před 6 měsíci +2

    Just so you know: an open diff is a constant 50/50 torque split. People often confuse that. An lsd or in this case the clutch pack allows the torque to go to the wheels that have the most traction.
    Therefore, when the diff is locked, it’s not a 50/50 split but a xx/xx split, meaning it changes dynamically. If both front tires are on ice and both rear are on asphalt, 90 something percent of the torque will go to the rear with the diff locked.

    • @speedkar99
      @speedkar99  Před 6 měsíci

      I understand your point. I sometimes get confused between torque and RPM.
      Also this diff is technically 45/55 seeing the difference in the size of the sun gears driving the output shafts.

    • @ova578
      @ova578 Před 5 měsíci

      @@speedkar99 yes but when its locked, that ratio goes out the window a bit depending on where traction is available

  • @Davo_1991
    @Davo_1991 Před 5 měsíci +1

    5:09
    That's what I like to hear, thanks man!

  • @thatotherboi8044
    @thatotherboi8044 Před 6 měsíci +2

    4:32 yup easy clap is the last thing I expected on this channel💀

    • @speedkar99
      @speedkar99  Před 6 měsíci

      LOL I say that all the time at home

  • @donwest5387
    @donwest5387 Před 5 měsíci

    it works great!

  • @michaelbrinks8089
    @michaelbrinks8089 Před 6 měsíci +5

    I can easily follow along & understand how an ice engine works & what all the parts are doing. I understand how a clutch & fluid torque converter work. The fluid torque converter itself is pretty genius. In how how they were able to use fluid & centrifugal force. To move the weight of an entire car with no actual mechanical shaft connection from the engine to the transmission drive shaft. But when in it comes to transmissions with all the gears, parts, valves,etc.. It boggles my mind trying to folliw along & fully grasp how all those parts work together & exactly what's going on inside.

    • @speedkar99
      @speedkar99  Před 6 měsíci +1

      I understand where you come from, it's because it's hard to visualize gearsets moving and clutches activating.

    • @michaelbrinks8089
      @michaelbrinks8089 Před 6 měsíci

      ​@@speedkar99 Plus trying to visualize how all the fluid travels around in the worm tray & trying to visualize what's happening in the valve body....I think the fluid changes directions and travels in different paths in the worm tray depending upon what gear it's in & how fast different shafts are spinning.
      But it's still mind boggling & I don't understand how someone can fully grasp everything that's going on inside......🆚 something like a jet turbine that's pretty easy to fully grasp how it all works.

  • @juliuslyimo2162
    @juliuslyimo2162 Před 5 měsíci

    Brilliant! Godbless you

  • @IvanAtThe555
    @IvanAtThe555 Před 6 měsíci +3

    That particular planetary centre diff (on the 5EAT) has a 40/60 F/R split when the clutch is open.

    • @speedkar99
      @speedkar99  Před 6 měsíci

      Isn't it 45/55? 2005 Outback

    • @IvanAtThe555
      @IvanAtThe555 Před 6 měsíci

      @@speedkar99 Could be me misremembering! Just knew it wasn't a 50/50.

  • @randywilliams4325
    @randywilliams4325 Před 5 měsíci

    Thanks for your effort . Mrs has a 2012 Outback 3.6r with that trans . I am a retired auto tech but did most of my work on Fords . I you pull the plug on the pan you get 4 qts out of it . I have been changing just 4 qts every 20000 miles . Trying to make the car go as far as possible . Those clutch packs look good for the mileage that unit had .

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Yep it sure looks clean.
      Keep doing fluid changes and it should last a while

  • @roberts8783
    @roberts8783 Před 6 měsíci +1

    please do a subaru cvt. great video

    • @speedkar99
      @speedkar99  Před 6 měsíci +1

      I sure will...if I can find one.

  • @BLKSG6
    @BLKSG6 Před měsícem +1

    12:15 I don’t think those are “sun” gears with “step-down planet gears” around the input and output shafts, that you might see with a ring gear. To me those look like they are functioning as differential side gears, going around together with both shafts until there is a difference in speed. Which is also why there are so many!!

  • @GeneFever
    @GeneFever Před 6 měsíci +4

    "...so you can make it to your local takeover and show the VQ boys how it's done."
    Always enjoy catching the shade tossed in with the lesson, good stuff @speedkar99

    • @speedkar99
      @speedkar99  Před 6 měsíci +1

      Ah glad you caught that one!

  • @E85_STI
    @E85_STI Před 9 dny +1

    Interesting video

  • @eyemastervideo
    @eyemastervideo Před 6 měsíci +1

    Amazing how complicated that system is. We definitely don't think about that when buying a car

    • @speedkar99
      @speedkar99  Před 6 měsíci

      Agreed! So many parts to make it work.

  • @marcstamper9079
    @marcstamper9079 Před 5 měsíci

    Great 👍 info. Does the WRX have a separate reservoir for the center differential apart from the front differential and transmission?

  • @Ian-vi6iz
    @Ian-vi6iz Před 5 měsíci

    Awesome video! Can you put it all back together???😅

  • @itftcomputers
    @itftcomputers Před 5 měsíci +1

    Thank you for the video. Can you install 5EAT instead of a 4EAT? Is that even possible?

  • @corey6393
    @corey6393 Před 5 měsíci

    Excellent video with very clear explanation of what is happening inside the mystery box. I own a 95 Legacy automatic, and have owned several others of similar and earlier vintage. DO those cars used a similar setup or do they have the more simple viscous coupler?

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Likely an open center differential

  • @11131618570
    @11131618570 Před 6 měsíci +2

    Pff, the engineering that went into this. Thanks for tear down.

  • @Aleks_Mechanics
    @Aleks_Mechanics Před 6 měsíci +2

    Notification Squad!🔥🔥🔥

  • @martinr8278
    @martinr8278 Před 4 měsíci +1

    Definitely superior manufacturing! Well done Subaru…..other brands start taking notes

  • @1uch1n11
    @1uch1n11 Před 6 měsíci +1

    hope the baby and fam is well!

    • @speedkar99
      @speedkar99  Před 6 měsíci +1

      Thanks for remembering! We are doing well.
      It's cold out so the baby won't make an appearance anytime soon.

    • @1uch1n11
      @1uch1n11 Před 5 měsíci

      Happy holidays homey @@speedkar99

  • @OutsideTheTargetDemographic
    @OutsideTheTargetDemographic Před 6 měsíci +6

    *uses broken bricks to hold transmission shafts
    Genius, man. 🍻

    • @speedkar99
      @speedkar99  Před 6 měsíci +1

      I didn't want to build a V-block just for this quick demonstration

  • @hearditfirst8010
    @hearditfirst8010 Před 5 měsíci

    Can you do a video on E-CCVT? Electronic controlled variable valve timing for intake

  • @itsmiketehdrummerguy
    @itsmiketehdrummerguy Před 5 měsíci +1

    Very interesting, it sounds like that when the AWD clutch is engaged, this system operates more like 4WD than AWD.

    • @speedkar99
      @speedkar99  Před 5 měsíci +1

      Yes but Most 4WD uses low gear range

  • @user-zo3fv9ex8h
    @user-zo3fv9ex8h Před 5 měsíci +1

    Worth to mention that in the selеctor position 1 the central dif remains locked on the low speed. In the past quite often the fail of the solenoid C caused the fail of RWD part, so Subaru became FWD only. We even installed a switch to toggle between FWD and AWD back in the days :)

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Awesome! My brother installed a toggle on his Infiniti G37

  • @Evdrad
    @Evdrad Před 5 měsíci +1

    I used to work for subaru and I will say I was surprised when I found out all Subarus (except the BRZ and solterra) have different awd systems same with diffs

    • @speedkar99
      @speedkar99  Před 5 měsíci

      Yeah they certainly are different