2016 - 2021 Honda Civic 6 speed transmission service

On this video I cover how to replace your transmission fluid on 16-21 Honda civic with the 6mt non type R models.
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The sole purpose of this video is for informative and educational purposes of my process and experiences. Bc auto solutions/hondamobilemechanic is not responsible for any individual actions taken from this video. Always wear protective hand, eye, ear, and respiratory equipment. Results may vary and are not guaranteed. Use this information at your own risk. Always seek professional help in diagnostics and repairs.
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[@RDeanOdell]

Any chance this is the same procedure as a 22+ SI civic? I watched to the end and you mentioned there are only slight differences… Thanks for the great content.

[@BCautosutions]

Yes very similar. Can definitely use this as a reference.

[@edwardinvegas]

@@BCautosutions Another question. How long of an extension bar would you recommend needed to get to the fill bolt for the 22' Civic Si?

[@BCautosutions]

@ I would get atleast a 24”

[@shahrukhbakar3248]

I just changed the MT fluid on my 2017 Accord Sport 6MT. I can confirm there was no fill plug washer, and I went to the dealer and indeed the parts catalogue didn’t show one either. It’s really strange to not have a fill plug washer and not a great idea to have the fill plug tightening directly on the transmission case. I’ll add one next at next fluid change.

[@BCautosutions]

@@shahrukhbakar3248 yup that sounds about right.

[@Charkatak]

Remember doing AT fluid change on 2010 Acura RL and this top bolt was so tight that even pushing with my body took some effort to loosen.

[@BCautosutions]

@@Charkatak yeah they are ridiculous right and you lose a lot of leverage due to the extensions flexing.

[@shahrukhbakar3248]

The MT capacity for the 2017 Accord Sport 6MT says 1.9L at change and I measured the fluid when I drained it - got 1.95L from what I presume is the factory fill. I filled in 2.0L of Honda MTF.

[@BCautosutions]

@@shahrukhbakar3248 thanks for sharing!

[@shahrukhbakar3248]

Another nice feature for manual transmissions is that you can simply specify a fill capacity and as long as that capacity is put back in, the transmission is properly filled. Simplicity itself. No need for check bolts or complex procedures to check the level.

[@shahrukhbakar3248]

*Almost* makes up for the lack of a dipstick. Would still prefer one but the drain/fill procedure is so easy that it’s OK to not have a dipstick. Will change yearly.

[@BCautosutions]

@ ✅

[@BCautosutions]

@ 💯

[@eric9249]

'24 2.0 6mt owner here. Purchased brand new with near to 0 miles on the odo. I can confirm; there was no washer on the gearbox fill plug from the factory.

[@BCautosutions]

@@eric9249 yup, I’ve seen this countless times (basically every time unless someone has been in there like myself) funny part it had some sweating around the full plug indicating it needs one.

[@catsspat]

Same here with 2024. I guess I'll put one on the next time I flush it.

[@BCautosutions]

@ not sure why Honda opted to leave it out. I’ve seen a few with stains indicating fluid seeping past the bolt. Not a huge deal but still better with one imo.

[@shahrukhbakar3248]

@@BCautosutions have you noticed any issues with having a fill plug washer? It seems like there are more than enough threads to allow for one and there is a machined surface on the transmission case for sealing

[@BCautosutions]

@ I add one every time and never had any issues

[@markhumphrey9402]

Thank you for sharing this information, so appreciative!!

[@BCautosutions]

Thank you for supporting!

[@RM18188]

Great video. I use Amsoil MTF in 2014 SI with really good results.

[@BCautosutions]

@@RM18188 yes I’ve used it before. Great stuff and definitely better than the oem stuff.

[@edwardinvegas]

Thanks looks simple enough with my 14' CR-V and 09' Civic both are AT I lterally just drain and measure what comes out and that is exactly what goes back in and use new OEM crush washers. Looking forward to seeing how to do this with my 2022 Si 11th Gen. Im sure its similar as you say. I still have time with only 13K.

[@BCautosutions]

@@edwardinvegas yup that’s always a proven method u less if it has a leak then I do the level checks. Thanks for watching

[@belovedLion80]

I have to do this on my 22’ si as well. I’m just under 27k. Was waiting to hit 30k

[@BCautosutions]

@@belovedLion80 ✅✅

[@badarahmed5137]

Can you please make a video on 10th generation accord hybrid system and 2.0 engine review ? I’m highly interested in that vehicle instead of the 1.5T.

[@BCautosutions]

@@badarahmed5137 yes will do. When I get one in the shop I’ll make a video. In short, it’s a much better and reliable option vs the 1.5t in every way.

[@badarahmed5137]

@ is the 2.0 in the hybrid less reliable than the 2.4 ? That’s what I have now at 211k miles and I’ve maintained it meticulously.

[@BCautosutions]

@ they have their own set of issues. Usually influenced by poor maintenance on both of them. Numbers speaking of possible failure points the k24 is less reliable.

[@leandrobenitez67]

Is this the same procedure for the 2018 accord 6mt?

[@BCautosutions]

@@leandrobenitez67 yes although shields and air boxes are different

[@sergeyparshin8682]

Form the factory, there’s no crush washer on the fill plug. Amsoil MTF provides far more enjoyable shifting experience. And lastly, you missed setting the step via removing the check.

[@eric9249]

The Amsoil MTF, what is its weight in cSt? I would bet $$ it's the wrong viscosity and would probably provide for worse shifting in cold climates.

[@BCautosutions]

@@sergeyparshin8682 ✅ no crush washer there is ludacris so I always add one. We only use oem fluid at the dealer although I’ve used amsoil and agree. I put in what came out and it calls for, anyone can check the level if they wish.

[@sergeyparshin8682]

@@BCautosutions I’ve done the same twice when I was changing MTF in my civic. Just had it done again a month ago, and figured I’d follow the “procedure” and crack that check bolt open. Sure enough, with two full quarts it was barely dripping from the check hole, which means two quarts is all you need and can save time in future when changing it. Thanks for the content!

[@BCautosutions]

@ thanks for the support, as always! Also appreciate input as well.

[@sergeyparshin8682]

@ on a side note, would you happen to have filmed the front struts replacement on 3rd gen Pilot? Just did a timing belt on mine, and noticed the front struts shocks are leaking. Got everything ordered, just looking for a good video reference to prepare for the job

[@sdalexander8505]

No crush washer on the fill plug. Honda wants Hondabond used as a seal for it. There’s a 6mm level check bolt on the side as well. That has a tiny little crush washer that the dealership never stocks. Think they told me they had to order it from japan. I guess nobody changes it.

[@Candybuiltsi]

Trust me dawg you do not need nor want Honda bond on that a crush washer works more than good enough. Coming from someone with a fully built transmission who changes their mtf every 5k miles.

[@BCautosutions]

@@sdalexander8505 no Hondabond is found on there nor will I ever use Honda bond on a fill plug. You don’t want any old Honda bond falling there at the time of the next service. Crush washer is fine and is what I always add. I rarely check the level unless if it had a leak or if I do a trans rebuild.

[@sdalexander8505]

@@BCautosutions I agree, I don’t want Hondabond in my trans. I’m just saying that is what Honda’s instructions say. I doubt a tiny bit of Hondabond falling into the trans would hurt anything. Nothing is going to leak out of the fill plug at the top of the trans case anyway. The plug on the CVTs is like a wine bottle plug and not tight at all. I think the refill calls for like 1.92 quarts MTF. So yanking the check bolt allows you to drain out the tiny bit of excess from 2 quart bottles. But also, 0.08 quarts extra is not going to hurt anything either.