Transmission wont go in or out of gear

[Jhall.IV]

I drive a 2020 civic si sedan with roughly 30k miles on it.



Okay so my trans started being weird starting on halloween night, just driving rough being very difficult in and out of gears and generally just not great. It proceeded to keep getting worse for the following days to the point i had to force first and reverse to move the car at all and double clutch and match the rpms dead on to be able to change gears and even then it wasnt smooth at all. I tried everything short of replacing the trans. It feels like driving without synchros but at the same time like my clutch isnt disengaging fully. Its a very weird mixture of issues.

i changed the trans fluid, checked over the master and slave cylinders, double checked my shifter several times and even replaced the cable that runs directly from the bottom of the shifter to the trans.

upon replacing that cable it fixed my issues for 24-48 hours and less than 200 miles and the problem is back. It came back in the same manor and is progressively getting worse again.

all mods that could possibly relate to this:
Hasport 82a rmm
Clutchmasters fx350 for the stock flywheel
Clutchmasters lightened flywheel
Prl braided clutch line
Acuity full assembly short shifter

all of which have been on the car for several thousands of miles, the clutch has over 10k miles on it itself.

Does anybody have any idea what it is or could be?

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[vandalSI]

so you're using unsprung clutch disc and unsprung flywheel?

 

[iamrealskinny]

I drive a 2020 civic si sedan with roughly 30k miles on it.



Okay so my trans started being weird starting on halloween night, just driving rough being very difficult in and out of gears and generally just not great. It proceeded to keep getting worse for the following days to the point i had to force first and reverse to move the car at all and double clutch and match the rpms dead on to be able to change gears and even then it wasnt smooth at all. I tried everything short of replacing the trans. It feels like driving without synchros but at the same time like my clutch isnt disengaging fully. Its a very weird mixture of issues.

i changed the trans fluid, checked over the master and slave cylinders, double checked my shifter several times and even replaced the cable that runs directly from the bottom of the shifter to the trans.

upon replacing that cable it fixed my issues for 24-48 hours and less than 200 miles and the problem is back. It came back in the same manor and is progressively getting worse again.

all mods that could possibly relate to this:
Hasport 82a rmm
Clutchmasters fx350 for the stock flywheel
Clutchmasters lightened flywheel
Prl braided clutch line
Acuity full assembly short shifter

all of which have been on the car for several thousands of miles, the clutch has over 10k miles on it itself.

Does anybody have any idea what it is or could be?

So.. you installed the version of the clutch designed for the DMF onto the Lightened flywheel?

 

[Jhall.IV]

Yes, it was a dumb mistake when ordering it that i didnt realize until i had the product in hand about to install and my clutch was slipping horrendously at that point

 

[Jhall.IV]

I had no issues for over 10k miles and had no chatter. The clutch holds once in gear perfectly and ive never had any issues till just recently

 

[iamrealskinny]

I had no issues for over 10k miles and had no chatter. The clutch holds once in gear perfectly and ive never had any issues till just recently

Just making sure I got this right.

So you got the wrong clutch, did you get the correct clutch before you installed it?
Or you continued to install it even though it was wrong?

I believe if you have the SMF, you should be using a sprung clutch version.

I believe that could the reason you are having this issue.

Then again I could be wrong.

 

[Jhall.IV]

No i stayed with that clutch and i figured it would give me issues off the bat but not work perfectly and smooth as all hell for 10k miles and i dont understand how replacing that cable would effect it for awhile if it is the clutch/flywheel. Im not trying to be rude just to figure out my issue before i spend another 1500 and switch to yhe type r retro fit

 

[iamrealskinny]

No i stayed with that clutch and i figured it would give me issues off the bat but not work perfectly and smooth as all hell for 10k miles and i dont understand how replacing that cable would effect it for awhile if it is the clutch/flywheel. Im not trying to be rude just to figure out my issue before i spend another 1500 and switch to yhe type r retro fit

Once again, just asking questions.
What "cable" are you talking about?

I simply asked if you put the correct "clutch" in.
For the Dual Mass Flywheel, it requires a "UNSPRUNG" clutch.
For the Single Mass Flywheel, it requires a "SPRUNG" clutch.

Now, you chose to put in the "UNSPRUNG" clutch into the transmission when you needed the "SPRUNG" version. Unless I am reading this wrong.

The way I see it, that could be causing your issues.
Then again, I could be wrong.

Clutchmasters seem to be hit or miss with 10th Gens.

Did you adjust the clutch pedal?

 

[SDAlexander8]

Sounds like the clutch isn’t fully disengaging when the pedal is depressed. If that’s the case, the synchros are gonna take a huge beating as they fight the clutch keeping the shaft spinning.

 

[Memogiyi]

Have you gotten any check engine lights?

I would say check your sensors as well to be safe. I was having some trouble after my clutch install (unsprung clutch + dmf) and was thinking it was my clutch cables as well, but it turned out being the speed sensor breaking off a piece and going into the transmission.

Do you still have warranty?

 

[Gotch]

Warranty after a clutch replacement??? Lmao. How the hell does a 2020 Si have a clutch replacement already? I have 110k (kms) on the stock clutch, tuned...

 

[Memogiyi]

Warranty after a clutch replacement??? Lmao. How the hell does a 2020 Si have a clutch replacement already? I have 110k (kms) on the stock clutch, tuned...

Lol technically he doesn’t have to tell the dealer the clutch was replaced. Just take it in for a diagnosis. But don’t know if that’s an option for him.

 

[Gotch]

Um ya, no... they will immediately tell the clutch was replaced.

 

[Memogiyi]

Right but if the clutch is not the issue they may fix it under warranty.

 

[Gotch]

The clutch is the issue, probably incorrect installation or set up.

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