Understanding the Acura Sport Hybrid

[@MrPatdeeee]

I've said it before and I will say it again; and probably in the future: John Kelley is the greatest DIY instructor on this planet IMHO. If one can not learn from him, they can NOT learn period. Thank you John. You are truly a cut-above. I enjoyed every minute learning how this incredible 7 gear transmission works. WOW!

[@WeberAuto]

Thank you very much

[@MrWilliam.Stewart]

John is, a legend. By all definitions of a legend, John qualifies.

[@younes530]

i share the same point of view. thank you very much Mr John D. Kelly

[@WeberAuto]

The reverse mystery has been solved! A big thank you to Michel Kraus. Solution: "Even Gears" clutch engaged -> reverse idler -> reverse gears -> planetary gear set -> 5th gear. 54/34 * 51/54 * 35/63 * (1+(111/39)) * 48/42 = 3.663:1

[@DolganoFF]

Gosh, that's a lot of gears turning!

[@mibars]

So that's like the 2nd solution using different clutch and gears that gives exact same result! That's amazing :) My solution was "odd gears" clutch engaged -> reverse gears -> reverse idler -> 2nd gear. It also came out to be 3.662. Option with using "even gear" for reverse makes sense allowing preselection of reverse for quicker shift.

[@raspam]

I can't help, but calculating it over and over again with the above figures I always get 3.66300...:1. But I don't get fussy about it: just the 3rd decimal :-D

[@WeberAuto]

@@raspam You are correct. I fixed the error

[@yohanantadesse6816]

hello there sir , is there anyway that I can get the dimensions of the whole transmission components ?

[@pgs8597]

I’m always amazed at mans ingenuity to invent these things and then package it in a relatively small housing. Awesome.

[@WeberAuto]

You and me both!

[@65oh7]

That's a very neat package, and apparently if you reverse the drive wheels and add two turbos, it's the secret sauce of the NSX.

[@WeberAuto]

Good point. We would need to add two more gears too.

[@JamesSmith-dn8lb]

Also the fit hybrid minus the two rear motors.

[@Remi-xp6vx]

Wait, what? Please explain, I want to make my MDX even faster. :). The MDX is also 4 wheel drive with the two electric motors in the back wheels. Great video.

[@miguelborromeo6010]

Good Lord ! This is just sooo complex and so many parts = many actuators that can fail. Im sure its more reliable than a dry clutch but all those moving masses mean energy loss. Weakest component are the dual clutches and actuators. I prefer the eCVT from Toyota hybrids. However i do like the fact that there is only 1 electric motor on this transmission.

[@mrgold3591]

@@miguelborromeo6010 Acura version is a replacement for displacement, turbo(s), or supercharger. You also get regen braking and torque vectoring with or without engine power to improve handling. Extremely smooth and invisible system. Never about getting improved mpgs (a happy by product of the Sport Hybrid design for only $1500).

[@mynsxt6]

I have this transmission in my 2014 rlx hybrid and I love how smooth and quietly it shifts!!!!!

[@WeberAuto]

Thanks for watching

[@Shabbe02]

How many miles?

[@mynsxt6]

@@Shabbe02 160k, preparing to change the transmission fluid in 2 weeks x3 dw1

[@mrgold3591]

Love the explanation of how the hybrid 7DCT works. I have both the MDX and RLX hybrids and the powertrain is extremely smooth and always seems to be in the right gear for performance or economy driving. All 17-20 MDX hybrids come with the same 4 motor set-up as the 14-20 RLX hybrids (NA Engine, 7DCT+front electric motor, twin rear electric motors). The RLX hybrid can reverse in electric mode only with the 2 rear motors; but, the MDX hybrid always starts the 3.0L engine in reverse. I can't tell if the MDX hybrid is also engaging the rear electric in reverse because the display screen switches to the back-up camera. The 7DCT is one of the top rated and reliable transmission Acura/Honda has in its inventory. The only downside was you cannot tow with this transmission. Too bad Acura/Honda decided to drop the hybrid powertrain option.

[@pilozm]

I drive the MDX Sport Hybrid and knew there was a lot of complexity going on, but you putting it on video really brings it home. The engineers that designed this are brilliant, which means you are also, in order to explain this. 🙇‍♀️ Thank you

[@WeberAuto]

Thank you very much

[@bdevine12]

For the life of me I do not know why more people didn't buy the Sport Hybrid option for the MDX, I believe it was only 2k when we bought ours. The amount of performance increase you get over all the other same year MDX's is very noticeable. I think most people think slow hybrid when they see they it and are shocked when it flies off the line. I really wish they put this drive train in the ASpec version, I also wish Acura didn't kill it and improved upon it. One caveat for this video, the MDX Sport Hybrid has the same setup as the RLX, twin electric motors in the back, one in the front but a 3.0l gas engine. The RLX Sport Hybrid has the same electric motors but the gasoline engine is a 3.5l.

[@marcospilozo1752]

@@bdevine12 I miss that car for long trips. It was a little more expensive, so fewer people wanted to pay more. You are right that it was similar to the RLX, but also *similar* drivetrain to the NSX.

[@mrpontiac83]

Best explanation of a dual clutch transmission I've seen... Nice work as always!

[@WeberAuto]

Glad you liked it!

[@sajanaabeywardana9725]

I have waited for a video of hybrid vehicle with dual clutch transaxle from you professor..Amazing..You did it..I suggest Honda hybrid DCT systems for ur upcoming videos.

[@WeberAuto]

I am happy you like it

[@calholli]

He just did one of the Honda hybrids.

[@edwardmyers1746]

Glad to see you Professor! Have a happy holidays!

[@WeberAuto]

Same to you! Thank you

[@micku9954]

Well and clear explained ! much better than Acura oem online training

[@WeberAuto]

Thank you

[@SvcGlobal]

Another new technology hybrid transaxle with dual clutch so well explained, thanks Professor!

[@WeberAuto]

Thank you very much

[@JessieAMorris]

Wonderful video! I love watching and I'm glad to see that you're still making videos. I missed the content during the 7 month hiatus.

[@WeberAuto]

More to come! Thank you

[@nickmayo2974]

John, I hope your student's appreciate your considerable talents in instruction. Also, as an Acura dealer tech, thanks for showing a hands-on demonstration of the construction and function of this A/T. I've seen a lot of the information in self-study modules, but this really helps to get a grasp of how it all works together. Thank you so much! I've learned a lot from your videos like this one(as well as the ZF9, that was a good one too).

[@WeberAuto]

Thank you very much

[@Mo.Jo.]

Would love to see a video on the 8 speed DCT with torque converter from the TLX/ILX - though I'm sure there is a lot of overlap with this one.

[@WeberAuto]

I would like to get one to explore, but it is low on my priority list right now. Thanks for watching

[@AlexRuark]

More reliable than the Focus dual clutch? That is a low bar my friend!!! Thanks for another fascinating video.

[@WeberAuto]

Lol. Thank you

[@dominicfong6341]

So glad to see you again dear Professor Kelly, Seasons Greetings, please stay safe and healthy always sir.

[@WeberAuto]

Thank you

[@dudleyfuddpucker7017]

John, you are awesome. Happened on these videos quite by accident, but owning both an RLX hybrid and a Prius found your videos on both incredibly clear and informative. Keep up the great work!

[@GGY1976]

My 2020 RLX Sport Hybrid averages 28mpg while doing all wheel drive with 4 engines making 377 hp and 350ft pound of torque. Pretty amazing!

[@v0ster]

Thanks for video! Yes , this is the same transaxle which used in Japan market Honda FIT, Shuttle, Vezel, there is only difference is a dual clutch, which different that you showed in your video.

[@WeberAuto]

Thanks for the info!

[@jamesterrill1938]

Mr. Kelly you present a great video. I have had 3 Acura vehicles and would like to have one of these new ones....

[@WeberAuto]

Thank you

[@mooring10]

Thanks for making videos like this. I have to watch most of them more than once and spot something I missed every time! Explanations are detailed, organized, and well paced. You are truly a gem of a teacher.

[@jehminjung89]

So Glad you are looking well Mr. Kelley Thanks for another great upload

[@WeberAuto]

Thank you very much

[@jayh1947]

Thank You for the explanation even though it blows my mind that it is in production with a warranty. You really are a great resource for us old guys..............Jay

[@WeberAuto]

Thank you

[@charlesdeblanc3386]

Expertly explained in easy terms and useful demonstrations. I'm working on getting my L3 and have learned so much from your videos. Thank you John!

[@MrPatdeeee]

John I can't stop thinking about this awesome transmission. So I have some trivia; that takes me back to the 40's. I remember very well the "new" phrase "Synchro-mesh"; that eliminated the problem in manual transmissions. Often called "Gear Jerking". And that horrible sound. LOL This phrase was everywhere in the auto-world, when it came out. I was taught this in auto-shop in HS, in 1949 when I was 17 yrs old. And just think, your using the word "synchronize"; BUT used in a different way; is awesome. I can't get over that we are using something that went away; only to come back in a better way of using it. Wow! In other words: in the old days the synchronizer items were constantly used to "mesh" gears from one gear to another. But in the new way, there is NO constant meshing of gears; for they are always in mesh; yet we still use the synchronizers and their "fork" drivers. Wow! What hath man wroth? I am blown away. But I doubt that I could've learned it (age 88 now), IF, it had not been for your rare innate style of instructing. Thank you, thank you kind Sir.

[@WeberAuto]

Thank you for sharing. Happy holidays

[@skrevox]

Amazing content as always. Greetings from Kenya 🇰🇪

[@WeberAuto]

Thank you

[@bo-boboski4118]

Im amazed by this guy... hes just sitting there getting winded by just... sitting there. Amazing

[@kristianhermann5971]

Intriguing design. Thanks for the walkthrough John. I've read Honda made a dry-clutch version for the Fit Hybrid (for other markets), only to be replaced with yet another transaxle design. There's certainly lots of effort spent on design at Honda!

[@WeberAuto]

Thanks for watching

[@ericcindycrowder7482]

Also I find it interesting that Honda/Acura decided to use the LuK electric motor actuator to move the shift forks. Most of the European DTC including Porsche PDK use hydraulic pistons and a valve body to move the shift forks. FYI, the 2nd gen NSX 9 speed DTC also uses the LuK electric shift actuator and a pair of hydrostatic electric actuators (also LuK/Delphi) to generate hydraulic pressure for clutch application.

[@WeberAuto]

Good information. Thank you

[@Spector_NS5_RD]

Thank you for these well detailed videos, John. I love listening to good teachers who can explain processes and operations in a way i can understand. There's a wealth of information on the channel, thanks to you!

[@WeberAuto]

Thank you

[@thomasmogensen1]

Thank you for the walk through, very informative. And really interesting to see. Really cool transmission looks very well build and thought trough.

[@WeberAuto]

Thank you

[@cheetah.motors]

That was the best explanation I've ever seen, thank you ❤

[@dennishorsthuis1507]

Thx U for your Time! I own and Love the 2014 RLX Hybrid

[@WeberAuto]

Thank you. I am happy to hear you like the RLX hybrid

[@andy16666]

Great content as always, John. Really admire your attention to detail.

[@WeberAuto]

Thank you

[@tinolino58]

I love your explanations! They are interesting to me even I am trained in VERY LARGE transmissions for steamturbines, powerplants für nuclear submarines and planetary gears up to 130t, etc.

[@WeberAuto]

Thanks for watching

[@JlerchTampa]

"I know, I'm getting sick of it too" While a little repetitive it is VERY educational and gets the point across. BTW, Damn this is pure machine and design porn, Thank You!

[@WeberAuto]

Thank you!

[@WpC-i3v]

Excellent explanation, Professor.

[@samdevisser1881]

Thank you, professor for sharing your wealth of knowledge, I;m enjoying it very much, each time over and over again. Have a good day too.

[@WeberAuto]

You are very welcome

[@mscir]

Great explanation, thank you. Sounds like we need a new terminology for transmissions. Decades ago I had a VB with a manual transmission but no clutch, it was called the Volkswagen Automatic Stickshift. I like the idea of having an electric motor driving each wheel.

[@WeberAuto]

Thank you

[@ГалинаРешетняк-т3х]

From Russia with love ! With love to your videos

[@WeberAuto]

Thank you

[@MarioDallaRiva]

No.1) you're amazing at explaining complex systems, Professor!! No.2) as impressive as this Acura unit is, I can't help but be even more impressed by the "simplicity" (note the quotations) of the BEV motor/inverter/gearset as you've shown in detail on say the Chevy Bolt!! I look forward to the Tesla content 👍🏻👍🏻👍🏻

[@WeberAuto]

Thank you very much

[@drdoolittle5724]

The first Honda automatic boxes were I gathered achieved without paying anyone royalties so is the dual clutch a royalty gain for Porsche? Thank you very much for your superb teaching.

[@WeberAuto]

Thank you

[@vincelacbayog7147]

Thank a lot for like this free training

[@WeberAuto]

You are welcome

[@vincelacbayog7147]

Keep safe always sir godbless

[@elcheapo5302]

It's amazing how much engineering goes into a DCT...and I still can't stand driving a vehicle that has one. Thanks, Professor!

[@terrencerueger3886]

Honda Africa Twin motorcycle with 6 speed transmission is DCT. Will be interested in seeing one of those apart. Unless of course its my motorcycle. Lol

[@WeberAuto]

Thank you

[@fascistpedant758]

You must be thinking of CVTs.

[@terrencerueger3886]

@@fascistpedant758 not sure who you are referring to. Africa Twin motorcycle has DCT not CVT. El Cheapo says he "still can't stand driving a vehicle that has one".

[@fascistpedant758]

@@terrencerueger3886 Most people hate CVTs but don't notice the difference between a DCT and a conventional automatic.

[@fascistpedant758]

Many thanks John. Have a very Merry Christmas.

[@WeberAuto]

Same to you! Thank you

[@SeanBZA]

Friend has a Proton Savvy, which is a single clutch automatic. Shifts on it can best be described as glacial, as it will actuate the clutch, wait for a time, then change the gearbox to the appropriate gear, and slowly release the clutch to engage. Drive it and you are never going to get any fast changes, though it is otherwise a peppy vehicle for the mass and engine size.

[@WeberAuto]

Glacial shifts. That is a great description!

[@metricstormtrooper]

There's more moving parts in that transmission than in a whole EV.

[@WeberAuto]

Yes there are!

[@williamgoode9114]

Why you need all that gearing when you have electric input, Prius has non other than their "diff" drive, this seems like a legacy solution when they don't understand electric motors

[@g1981c]

@@williamgoode9114 nobody is stopping you from driving a Prius :)

[@williamgoode9114]

@@g1981c well it won't sell cos there's no advantage in performance and a huge cost in machining, most legacy companies are going to fail, and with thinking like this, Honda is one of them

[@g1981c]

@@williamgoode9114 what do you care how much machining is involved if it's all done by robots. it's all recyclable materials and doesn't require tons of copper, lithium, cobalt or neodymium like your beloved Tesla.

[@alejandrovallinacollado3969]

Un gran trabajo como siempre muy claro !!! Pena en España no se venda este modelo para poder probarlo!! Un saludo y esperando más videos

[@WeberAuto]

Muchísimas gracias

[@LiquidTurbo]

This is an incredible KZbin channel, thank you so much for this content.

[@abdullahbinshahid3199]

Very interesting, the dry dual clutch hybrid Honda uses in it's compact hybrid cars (hrv hybrid or vezel in Japan)/fit hybrid/grace hybrid) is similar as in it's also 7 speed, and the motor is only connected to the odd input shaft, but also completely to the odd clutch assembly, so it can drive 1st 3rd 5th and 7th independently of the engine, and it only drives through those odd gears only for eg engine in 2nd, motor in 3rd, engine in 6th, motor in 5th. But the motor shifts independently of the engine half the time, so shifts happen like: motor in 1st, engine starts in 2nd; motor shifts to 3rd while engine is still in 2nd; engine shifts to 3rd and now matches the motor; motor is still in 3rd while engine shifts to 4th; motor and engine both shifts to 5th etc. But one drawback; motor shifts are single clutch operated so when in motor power, you can feel the single clutch 'pause' between shifts (but if you're going with even a little bit of inertia the engine always kicks in to cover up the motor shift 'lag')

[@wongchai807]

Great break down sir!

[@WeberAuto]

Glad you liked it!

[@wongchai807]

@@WeberAuto 👍👍 it wasn't on my radar but I saw a used one for a good deal. Someone said it was the baby nsx without a turbo. That made me really look into it. I'm not big on the hybrids because I'm not familiar with the technology but I do trust Honda 100%

[@A2an]

Just beautiful explained, I just love this session. I always wait to it's nice and quiet around me and then I see your video, you know concentration is needed 👍 Thanks to you for all the time and effort that goes into making this video. PS: The reverse gear is probably just a type error 😊

[@WeberAuto]

Glad you enjoy it!

[@compu85]

The layout of the dual wet clutches in this seems quite similar to the VW 02E DSG 6 speed dual clutch transmission, which has proven to be reliable long term. One odd thing with the VW setup is that reverse is on the even gear clutch, which is smaller just like this setup. Reverse also had a taller ratio on first, which made backing up on steep hills unnerving... lots of clutch slip. This is a much better setup that the 7 speed DSG + clutched flywheel electric motor the Jetta Hybrid had! Can this transmission pull away from a stop on electric power only? That would help solve the sometimes less-than-smooth action some DCTs can have in stop and go traffic.

[@WeberAuto]

Yes, electric alone or electric assist.

[@mrgold3591]

The MDX always starts the engine in reverse; while, the RLX hybrid can reverse in electric only mode or use the engine.

[@yianisss]

these videos are gold

[@WeberAuto]

Thank you!

[@savclaudiu2133]

Because it's a dual clutch transmission I think that the reverse gear should be powered by the "even gears" clutch so that it can smoothly switch to first gear. Therefore I think that the power path for the reverse gear is hollow input shaft gear -> reverse idler -> reverse shaft -> reverse gear -> odd gears shaft and to differential via the same path as the first gear.

[@WeberAuto]

You are correct. The reverse mystery has been solved. See the pinned comment at the top of the comment list.

[@king_br0k]

Odd gears use the larger clutch pack to reduce wear when starting from a stop in 1st gear?

[@WeberAuto]

Good point. Thanks

[@king_br0k]

@@WeberAuto thank you for the detailed explications

[@calholli]

@@king_br0k meh--- I think its just a fitment issue-- I think the smaller clutch would work just as good--- its just a matter of fitting one around the other as to why its so big. Besides, the electric motor helps a lot in 1st gear take off and that is by design. Dual clutches are known to burn "the clutch" when driving slow-- like in an offroad situation where you are constantly on and off the brakes and throttle pedal. Dual clutches do not do well in those places and you WILL smell the clutch burning and it will usually heat it the Trans and cause overheating sensors to go off and put it in limp mode... But using the electric motor for take off basically eliminates this problem. I can see this set up lasting a long time, as long as the motor's wire is suffeciently over built so that it will last forever. I wish they would just make it a manual trans with a shifter, I would like that so much better.

[@MrPatdeeee]

Makes sense. Thanks for you comment.

[@fascistpedant758]

I don't know? Both clutch packs seem to have about the same friction area. I think they're ~ equivalent.

[@grenjith]

thank you Prof Kelly. great video.

[@pablopicaro7649]

Marvelous explanation! IS this a similar technology to that used in Heavy Trucks that use a sequential type shift lever , (Wikipedia) The AM General M915 has a Caterpillar 16 speed semi-automatic transmission . I always remember the sound of Pneumatic pistons puffing when changing gears.

[@WeberAuto]

Yes, it is similar. Air powered shift forks, etc.

[@Username64870]

Thanks..please need a demo how shift forks are operated..? And monitored. ..?

[@WeberAuto]

Thanks for the suggestion.

[@Easterndmondbk]

I get it, but gee whiz. Things things this complicated in many cases don't seem to hold up. Love your work.

[@mrgold3591]

The 14-20 RLX hybrid and 17-20 MDX hybrid have the 7DCT and it just need schedule transmission fluid changes to keep peak performance.

[@harrytej]

Most modern cars are complex.. why would an average joe thing this is supposed to be simple

[@hectorrivera5230]

Thank you for such a great video. I was debating between buying a older Acura 2012 instead of the 2017 Rlx hybrid. Just because of the transmission. I'm very curious to know is it possible to post a video how to service that transmission. I can not find anything anywhere on how to service or even check it.

[@WeberAuto]

Thanks for the suggestion

[@av8bvma513]

Outstanding lecture Professor! Were you recording while attempting to install three shafts with only two hands? It would be nice to see the moment when they 'co-operated' and dropped into place...

[@WeberAuto]

LOL, yes, but I did not want to show the trouble it was installing them. ;)

[@mibars]

There is one issue with wet clutches: While they do last longer they are also more expensive to service. Sometime in the future we will see these cars scrapped because cost of maintainence of transmission would be prohibitive compared to the used car value.

[@WeberAuto]

That can be said about any transmission in any vehicle, but yes, they are expensive.

[@charleskertell783]

I have a 91 dodge D250 with a A518 RH that needs work what video's do you have that may be viewed to help me learn to work on it

[@WeberAuto]

No, sorry

[@mrabdellatif4427]

thank you verry musch Professor

[@WeberAuto]

You are very welcome

[@mibars]

Reverse cannot go through 3rd gear as 3rd gear is on the main, odd gear, shaft which in reverse is powering that reverse gear assembly. Power goes throigh 2nd gear on the bottom of main shaft assembly (35 teeth) meshed to reverse gear upper gear (63?) connected via reverse sleeve to bottom gear on reverse assembly (46?) meshed with idler (54) meshed with 2nd shaft (46) then through 2nd gear (59/29). If I've read your reverse assembly label right (63 and 46 teeth) then this gives (63/35)*(54/46)*(46/54)*(59/29) = 3.662

[@WeberAuto]

Thanks, the reverse mystery was finally solved. See the comment pinned to the top of the page for details.

[@andrewsmactips]

You should have a sign outside your shop saying: Gear-head arguments settled here.

[@WeberAuto]

LOL

[@ghenkhoash2440]

Thank you very much for the video, Could you please also do a video on Hyundai/Kia dual clutch hybrid system? thanks.

[@WeberAuto]

Thank you. Yes, it is planned

[@pdhabets]

Great video! Had to laugh when the first clutch piston popped out. By the way, curious if y'all are planning on doing one of the Lexus RWD hybrid transmissions? Like the L110, L110f, L310, etc

[@WeberAuto]

Thank you! Yes, I have an L110 right here. I am hoping to find the L310 too, but no luck so far.

[@Martinsp16]

Another great video professor, thank you very much.

[@WeberAuto]

So nice of you

[@bilekmeziane960]

Hello Mr John , I hope you’re doing alright. I have an MDX 2018 hybrid , my transmission was shaking and hesitating when it comes to shift , I took it to an Acura dealership,they told me that my transmission is defective, and I should replace it . I bought a used transmission that has 80k miles on it , I had a transmission shop replace it . When he was trying to program, relearn, and synchronize it , it didn’t work , I towed my car to an Acura dealership to preform a programming, they weren’t able to do it . Now the technician is suggesting a new blank TCM module and program it with that installed transmission. I would highly appreciate it if you could help me with any advice and witch route I should take . Thank you 🙏

[@younes530]

thank you very much for your videos. they are very interessting. Thank you again

[@rudolphna54]

Thank you Professor, your content is always amazing. I hope to see you one day take a look at the Hyundai/Kia 7 speed DCT to compare it to the Honda and Ford ones. I hope you have a great Christmas!

[@WeberAuto]

Thank you. That would be interesting

[@yonastekilu4047]

Every time when you post videos I got amazed and crazy. It is amazing but I would like ask you question that what is the difference between CVT and an automatic trans Axel? After watching some other guise video a got co fussed a little. Thank you

[@WeberAuto]

Thank you, I have videos on each type. See my playlists

[@ericcindycrowder7482]

Another great video. Maybe you can also do a video on the new Acura NSX which shares hybrid technology with the MDX hybrid.

[@WeberAuto]

That sounds fun, but highly unlikely

[@minnesotaimaging9726]

Thank you.

[@WeberAuto]

You're welcome!

[@u3b93]

Is it the same gearbox that is used in the Honda Vezel, an Hybrid SUV for the Japanese domestic market?

[@WeberAuto]

I do not know. Thanks for watching

[@tomb375]

WOW! Excellent Professor! Thank you so much. What do you drive? I have an old 2002 Acura RL, Still runs and looks like new! One of the best cars I've ever owned. Thank you so much for this video, I learned a lot! Subscribing now. I will watch all your video's, great instruction and information. Thank you for sharing your knowledge!!!!

[@WeberAuto]

Thank you very much!

[@tomb375]

Don't forget me, still waiting on that info on the 2007 Mercedes GL450 4matic. Thank you.

[@allenadahoo]

Thank you for great explanation , amazing

[@WeberAuto]

Thank you

[@JlerchTampa]

Hmm, those clutch apply pistons are fairly small in diameter / surface area (compared to similar pistons in an automatic transmission like a 4L60-E) so they must run at relatively high pressure. Probably not a problem, just an interesting design decision.

[@WeberAuto]

I thought the same thing

[@aspecreviews]

I think they should make more Acura hybrids.

[@WeberAuto]

Thanks for watching

[@berdia0305]

Hello professor !! Thanks for the informational video !!)

[@WeberAuto]

Thanks

[@dindoawitan6441]

Thanks for the another information that I got to you sir

[@WeberAuto]

Thank you

[@theautomotivegarage]

Thank you professor for all your knowledge and videos'' :)

[@WeberAuto]

Glad you like them! Thank you

[@davidellenbaum1229]

2800.00 just for the dual-clutch i would hope it would be reliable

[@WeberAuto]

Thank you for watching

[@sergeyspirin4539]

Hi professor John Kelly ! Thank you! Acura RLX there is no mechanical connection between the front and rear wheels?

[@WeberAuto]

For the Acura RLX Sport Hybrid there is no connection between the front and rear wheels. The rear axle is electric only.

[@normalizedaudio2481]

I just flap my wings and go. You humans are so complicated.

[@WeberAuto]

Lol

[@alexarce5317]

Greetings professor, greetings from Mexico City

[@WeberAuto]

Hello there!

[@auto756964]

Thanks!

[@WeberAuto]

Thank you so much for your kind gift, I greatly appreciate it!

[@herbward5240]

Reverse...is the Fred Flintstone method, aka open door , use left leg.

[@WeberAuto]

LOL! Thanks for watching

[@alexmaina6317]

Would you edit the video now showing the reverse gear path, I didn't quite get it

[@mibars]

One step is not shown in 1st gear and it kept me wondering how does it work if a ring gear is stationary: The catch is that ring gear can be locked or unlocked to free spin. Between planetary gearset and a flange I can see shifting mechanism for a 1st gear fork which locks ring gear in place. So it must be stationary in 1st gear for it to work and it also must be unlocked when the 5th gear is engaged, or more precisely when the 5th gear shift sleeve is engaged. Otherwise engaging 5th gear sleeve and keeping the ring gear stationary would lock the transmission. In all other situations ring gear can be locked or unlocked with no effect on power transfer.

[@WeberAuto]

The ring gear can be unlocked as necessary with another shift fork. I forgot to show that in the video.

[@黃翔榆-y9v]

感恩，謝謝分享！

[@ablackformula]

Could reverse be powered by the electric motor, where the planetary gear ratios need to be considered? Also, I'm very interested in the control unit! There must be a lot of safety devices in place to ensure no two gears are applied at the same time. I'm sure there's a lot of 5v reference circuits going on in there. The hydraulic pump circuit must also have full pressure at engine idle, in order to engage the clutch to start moving. I feel like as complicated as this video may have been, that's only the top layer to fully understanding this system. Thank you for all your time invested in this, I find it very interesting.

[@WeberAuto]

Thank you. Yes, there is a lot more to the controls and the shift mechanism

[@calholli]

Exactly why I would just rather it be a regular standard transmission and do away with the dual clutches and electronic shifting all together. I'm biased though, basically all I've ever owned are manual tran's-- They are the only way to go.

[@ablackformula]

@@calholli I agree.. I wanted to learn to drive manual but couldn't afford another car, so I sourced the parts and converted the car I already owned. Been driving manuals ever since. However, this is still very interesting to learn and from a performance view the shifting times can't be beat! And it has an electric motor built in lol

[@rubiocra]

thank you

[@WeberAuto]

Thank you

[@danlee2181]

Thank you for the great video. Do you have plans to make videos on Honda Clarity plug-in-hybrid in the future?

[@WeberAuto]

My previous video was on its transaxle

[@mclovin6629]

Honda needs to put this powertain on the new Honda Accord 🙏🏽

[@JJFLD]

Apologies if I missed it but how does the engine start? I know most hybrids use the electric motor to start the engine instead of a dedicated starter. Does does this use the electric motor and lock up one of the clutches to fire up the engine or does this have a separate starter?

[@mrgold3591]

Acura uses a regular starter when you press the Start button or use the remote start feature on the key fob. Once the gas engine is started, the electric motor within the 7DCT takes the V-6 in/out of EV mode as needed from idle up to hwy speeds under 84 mph. It is an extremely smooth transition in/out of EV mode and you sometimes have to look at the RPMs or Power Distribution screen to see which mode you are in (gas only, EV only, or combo of each). The gas engine stays on at +84 mph speeds with limited to no EV functions (no regen braking, no tq vectoring, no awd engagement, fwd only).

[@JJFLD]

@@mrgold3591 That is freaking incredible.

[@Modestmillionaire]

Special fixture = tying a couple of shop rags together and tying them around all 3 shafts to drop in together.

[@WeberAuto]

Thank you, great idea!