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Hybrid transmission fluid - 9th gen - when to change it?

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Rudi

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Discussion starter · #1 ·
our '17 EXL hybrid has 22k miles. i'm not sure when B3 service light will come up.

at what mileage you change transmission fluid on a hybrid?
 
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#2 ·
Rudi said:
our '17 EXL hybrid has 22k miles. i'm not sure when B3 service light will come up.

at what mileage you change transmission fluid on a hybrid?
Click to expand...
It says when to change it, in your manual, code is number 3.
 
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#3 ·
Same as the other models (?), most report the B3 code coming up between 50-60K, some change the fluid every 20-30K. Having talked to a few trans. re builders they said on a reg. cvt it is more important to keep the fluid clean as dirty fluid will cause the belt to wear faster, their recommendation was a trans. fluid change every 20-25K. On my 04 auto. I have done a change every 30K, no transmission problems @
535K.
 
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Discussion starter · #4 ·
2Accordz: did you read my question? i know that it is B3 service code.

i want to know at what mileage this code will come up (30k?) and if it's recommended to change trans fluid before that.

KW2004Accord: Thank you so much! As always your answers are very helpful. Have a great day.
 
#5 ·
A '17 does not have a CVT and there is no belt.

That said, I have 46K and haven't had any messages other than oil changes yet.

Sent from my Pixel 3 XL using Tapatalk
 
#6 ·
Severin said:
A '17 does not have a CVT and there is no belt.
Click to expand...
Wrong.

The Hybrid has a CVT. Honda even calls it a "eCVT". Articles and YouTube videos that say it has no transmission are not accurate. (EDIT: removed steel belt reference)


Regarding Transmission Fluid changes, I've only read of 30k intervals for the CVT's including the Hybrid, at which point are drop and refill of 3qts is done. Just like the previous gens.

If by chance 60k is the interval given by Honda for the Hybrid, I'd still do 30k. Every Honda I've had likes refreshes in the 15-30k range, proven by UOA's.
 
#7 ·
#9 ·
Maybe not in the sense that we think of, calling it a eCVT makes it confusing, maybe the trans. fluid is used for the overdrive clutch or (?) as explained in your posted video, I stand corrected, thought they used a belt. DW-1 is what the owners manual recommended pre 2017 on the hybrid, don't know if that changed for the model yr. 2017.
 
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#10 ·
namegoeshere said:
So the Hybrid has a transmission. It's an eCVT. But instead of CVT fluid, it uses DW-1?

:confused:
Click to expand...
Yes, there is a transmission one that even uses Honda's DW-1 ATF.

The videos you posted explain it well. Engineering Explained is one of my favorite YouTubers.

I removed my reference to the "steel belt" because I cannot find where I got that information, or it was my own confusion among Hybrid and 1.5L CVT's tranny's. Not sure. So I retract.


And here's the facts from the Hybrid manual regarding Transmission Fluid change intervals;

15k is in fact for severe use and 47,500 (OR 3 YEARS) is for normal driving.

Image
 
#12 ·
Sorry, you are absolutely wrong...
Normally the electric motors drive the wheels. When the ICE drives the wheels is does so through a clutch at a final drive ratio appropriate for speeds > 40mph to highest speeds.

'13 -> '15 use a completely different hybrid system and drive train than '17 and up; read the letter from Honda and watch the videos.

lazytomcat said:
Absolutely wrong. 9th gen Accord 2013-2017 does have CVT for 4 cylinder engine or regular transmission for V6 engine
Click to expand...
Sent from my Pixel 3 XL using Tapatalk
 
#13 ·
Severin said:
Sorry, you are absolutely wrong...
Normally the electric motors drive the wheels. When the ICE drives the wheels is does so through a clutch at a final drive ratio appropriate for speeds > 40mph to highest speeds.

'13 -> '15 use a completely different hybrid system and drive train than '17 and up; read the letter from Honda and watch the videos.



Sent from my Pixel 3 XL using Tapatalk
Click to expand...
both right... Lazytomcat was referring to strictly ICE cars I believe....The hybrid is different than the regular gas cars...
the 4 cyl ICE cars have CVTs HCF 2
The V6 ICE, thats just a plain old trans...
Hybrids... well i give up ;)
 
#14 ·
I'm at 53,000 miles and haven't had the transmission fluid change code come up on me yet on the maintenance minder. Just had the oil changed for the fourth time a few weeks ago it didn't come up then so I'm guessing next year it will come up around 63,000 miles when my next oil change is due.
 
#15 ·
STL_Honda said:
I'm at 53,000 miles and haven't had the transmission fluid change code come up on me yet on the maintenance minder. Just had the oil changed for the fourth time a few weeks ago it didn't come up then so I'm guessing next year it will come up around 63,000 miles when my next oil change is due.
Click to expand...
Why wait, you may want to do it now.
 
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#16 ·
One of the problems with the HAH is there is very little description provided as to what components are there and how the whole thing works. The term, "eCVT" is not very accurate, IMHO, and I suspect it is a term invented to satisfy people who want to know but have difficulty understanding technical explanations. In reality the 2017 HAH has no transmission in the traditional sense. This is also the case for the 2015 model, which is essentially the same machine. Before that,I don't know. The eCVT is a generator and a motor with an electrical connection between them. I suppose it does transmit power and that is why Honda thinks it is correct to call it a transmission.

So with the above considered, where do you suppose the transmission fluid goes in an eCVT? Yes, there is no transmission fluid, and therefore changing it doesn't make sense.
 
#17 ·
Rudi said:
our '17 EXL hybrid has 22k miles. i'm not sure when B3 service light will come up.

at what mileage you change transmission fluid on a hybrid?
Click to expand...
Just a point to make, the 9th gen Accord Hybrids, and since, do not have transmissions in the normal sense. There is a gear train of course to get power to the drive wheels but no transmission. Even though Honda refers to it as an eCVT it is nothing more than the electric traction motor providing the go power up to ~45 mph and after that a clutch can add in power from the gas engine as needed. I think it's best to understand that since it does not operate anything like a regular CVT at all and therefore its needs for fluid change may be different.
 
Discussion starter · #18 · (Edited)
Ok, folks. Here is a report to my original post. It is edicated to all doubters of automatic transmission fluid change in Accord Hybrids and the rest of DIYers :)

At 41k miles replaced transmission fluid. Called the stealership just to check on pricing. Cost $155 before tax.

Enjoy:

If everything goes well will replace next time at 70k.

p.s. and nope at 41k miles there was no maint minder for tranny fluid
 
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#19 · (Edited)
I swear I noticed that my HAH 2017 cap says DW1. If so, isn't that AT LEAST one fundamental difference? And the volume of fluid? I saw an 8th gen transmission fluid change on youtube, but discounted it as being for the non-hybrid CVT. I just dont see how they are the same at all. Before I try to do a hybrid transmission fluid change myself, I am going to do a bit more homework/no assumptions.

update:
My manual shows:
Transmission Fluid Specified ATF DW-1
Transmission Fluid Capacity Change 2.33 US qt (2.11 ℓ)

Is the non-hybrid 8th gen accord the same? Volume of fluid sounds low. My 8th gen EX-L sedan used 4 quarts/litres, however it is sold in GWN (canada)?
 
#20 ·
@Rudi

If you put HCF-2 into your 2014, 2015, or 2017 Honda Accord Hybrid, then you just ruined it!!!

The 2014, 2015, and 2017 Honda Accord Hybrid uses ATF-DW1.

The 2014 Plug-In uses ATF-DW1

The 2013, 2014, 2015, 2016, and 2017 4 cylinder gasoline-powered engine with the CVT uses HCF-2

The 2013, 2014, 2015, 2016, and 2017 6 cylinder gasoline-powered engine with automatic transmission uses ATF-DW1

The manual transmission versions of the 2013, 2014, 2015, 2016, and 2017 Accords, regardless of engine size, use MTF
 
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RickBlaine
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