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Hi, just want to share a newly uploaded video on YouTube describing how Honda’s e-CVT ‘transmission’ works.

I know, I know, it is not a traditional transmission with varied gear ratios; from a broader perspective it serves the same purpose of diverting engine power to the front axle just as a traditional transmission does.

Some interesting points I picked from this video:
1. An additional 2.455 reduction gear is there from motor to front axle, making the motor to final gear ratio 8.398. I wasn’t aware of this reduction gear before.

This puts 232 lb ft of motor torque amplified to 1948 lb ft if I do the math right.
View attachment 526425

2. A permanently applied clutch is there on the flywheel for safety breakaway. This is something good to learn.
View attachment 526426

3. This e-CVT ‘transmission’ needs ATF similarly to a traditional transmission. The ATF serves the purposes of cooling, engaging clutch, and lubricating gears.

It seems no much fluid will be left inside during ATF change since the inside structure is so much simpler than stepped ATs.

Please explain quoted sentence would you?

Please explain quoted sentence would you?

It seems no much fluid will be left inside during ATF change since the inside structure is so much simpler than stepped ATs.
Did you mean “it seems NOT much fluid...”? And why? I mean the drain and refill spec in manual is 2.3 quarts so?? I’m wondering how much fluid in TOTAL is in this e-cvt? Anyone know?

 

[.167026]

If you have ever watched a tear town video of modern ATs, you’ll understand what I mean. There are so many oil channels inside the transmission making it impossible to drain all out by the bottom plug. That makes ATF change less effective if you can only drain 60-70% of all fluid inside.

I meant the structure of this e-CVT case seems less capable of hiding fluid here and there.

Yes. I also understand that this transmission does not have a torque converter and would also mean IMO anyway that it would hold a lot less fluid. Taking that in consideration and basically why I’d like to find out how much in total fluid it actually holds because if it’s less then the other 6-10 speeds typically using this DW-1 fluid one could assume MORE drain and refills at the 2.3 quart change would certainly be better and recommended to keep the fluid clean. I’m unsure of the filtering also with this trans and wondered what if any it had AND whether it’s serviceable? If not certainly another reason to keep it clean! Found this and thought it explains this system pretty well.