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  1. 8th gen si tranny and a 9th gen si tranny differences

    Hey y’all just wondering if there’s any differences between the 2 trannies and also would a 8th gen civic si Tranny fit on a k24z7 (9thgencivic si engine). Is it worth installing a 8th gen si tranny and even modifying the gears? Would like to hear y’all input. I have a great offer on a 8thgen...
  2. Engine swap or transmission change?

    9th Gen Civic General Chat
    Hey guys, I'm building my civic 2015 touring it's basic version automatic. I was thinking if it's a good idea to swap my engine with 2015 SI sedan or just do the transmission change from auto to manual? Has anybody done this before pls guide on your experience this will be my first time...
  3. 2013 civic lx (automatic) hesitation between gears

    Mechanical Problems & Technical Chat
    Starting from stop there is a little hesitation through the first three gear changes. Power and acceleration is still there once it finally connects. It has stalled at a stop sign after pressing on the accelerator and coming out of reverse into drive. This problem has been present throughout...
  4. Rough Shift after Coasting

    Mechanical Problems & Technical Chat
    Hello all, I own a 2012 civic AT (bought used at 60,000 miles) with 130,000 miles currently. Maintenance history of full transmission fluid flush at 60,000 and 100,000 miles. If I perform the recommended procedure for checking tranny fluid (car is warmed up, parked on level surface, engine off...
  5. FS : Acuity shiftknob, K-Series transmission spring, shifter cable bushing

    For Sale Section
    Everything is new, took out of the box for photo purpose only. Trade in the car (2015 Si) before i was able to install all of these. $150 for everything shipped in the continental US. Shipping to Alaska, Hawaii, and Canada at buyers expense. Thanks for looking.
  6. Transmission / Clutch Repair

    Mechanical Problems & Technical Chat
    Hi guys, Some history: Replaced the MTF with OEM Honda MTF Installed the K-Tuned CMC/SMC with DOT4 fluid Adjusted CMC engagement point to be juuuuuust before you can no longer use cruise control (very quick) Turned off rev hang Adjusted the fuel cut from 1st to 2nd to 10ms Adjusted rev...
  7. Transmission Clunks when car is warmed up

    Drivetrain Problems
    Hi everyone, My civic is a 2012 ex manual transmission with 140k kms. Lately I have noticed that when the car is at operating temperature the transmission tends to have a two part clunk when shifting gears. One clunk when the clutch is depressed and I am shifting and another when I am releasing...
  8. Bad throw out bearing or not? HELP!!!

    Drivetrain Problems
    Hi all Ill be posting a video link in here. Long story short I have a 2013 civic si, and recently bought a stage 4 clutch kit (un-sprung) from Action Clutch. I babied the car and new clutch for the first 800miles didn't do anything crazy. But now I am having a issue where when my foot is not...
  9. Is this a transmission leak?

    General Maintenance
    LONG story short. My 2012 Civic was recently rear-ended at high speed and the car is a total loss. Miss it dearly. Progressive did a total loss valuation and identified both "obvious" engine and transmission leaks that I was unaware of. I can't argue the engine oil leak-- they sent pics of what...
  10. 2nd Gear Grind

    Mechanical Problems & Technical Chat
    Hello! So I have a 2012 Civic Si Coupe that I just purchased. It has an AEM CAI, secondary cat delete, and Greddy 70mm exhaust. When driving spiritedly, when I shift into 2nd from at or near the red-line of 1st, it grinds until the RPMs drop. It also doesn't even feel like it is going into...
  11. 2nd A/T rebuild only 150k miles...please help!

    Drivetrain Problems
    Admins please move if not in correction thread. As title says, I'm facing my 2nd A/T rebuild at only 150k miles. I baby this car, all required maintenance and honda fluids and recommended times. At 90k miles my dealership had to rebuild it(luckily under warranty), but now 60k miles later I'm...
  12. Transmission problems

    General Maintenance
    I recently noticed that my clutch is a lot harder than other models. I was wondering if I have a bad clutch and if I need to change the transmission fluid. Is there anyway to diagnose what is happening to my car. When I shift, it is also harder than other models.
  13. Auto Transmission leak/crack? (pictures included)

    Mechanical Problems & Technical Chat
    Just hit 50k miles on my 2012 auto lx 4door. The shifts have been a little rough, so I decided it's time to change the ATF (automatic transmission fluid) even though Honda said it was fine at around 48k miles when I got my oil change. Got that gravel cover off and discovered this...
  14. Honda Civic 2015 - CVT Transmission Low Fluid Indicator

    New Member Introductions
    Hi, I bought a used 2015 Honda Civic and last night I found some green liquid under the car. It looks like it leaked from the transmission. It was enough to soak a paper towel. I don't know when it started leaking and how much oil had leaked. I could not find a dip stick to check fluid level...
  15. DIY - Si Transmission Fluid Change (Photo Heavy)

    Maintenance/Repair and Practical
    Ok, I've been searching for a DIY with lots of photos and haven't seemed to find one. I decided to make my own instead. It's a fairly simple job, but it can be time consuming if you've never done this before. It also gets a little messy. Just take your time and be patient. Here goes nothing lol...
  16. 2012 EX strange problem above 5k rpm

    Drivetrain Problems
    Hello all! New to the forum and to civic ownership! I have to say before I bought this car I was perusing your site and now that I have one felt it was time to connect with the inter webs group of people who know more than I! I also hate starting a thread with a problem, so for starters I...
  17. Transmission problem, '14 5spd MT

    Mechanical Problems & Technical Chat
    Hey guys, I've been searching for an answer to this question for years at this point, even took the car to Honda a few times... I've found questions that are similar, but not quite what I am experiencing - or perhaps exactly what I have, but they described the problem differently. Initially...
  18. 2014 civic si 10k miles transmission seaping

    Drivetrain Problems
    Hey guys I got a new 14 civic si and I just hit 10k miles and I went to change my oil and while I was under the car, the tranny had the sealent pealing of the bell housing and there was a form of dirty black fluid that wasn't wet but I can remove with my finger wet. Should I go to the dealer and...
  19. Glass transmision?

    9th Gen Civic General Chat
    Hey all. I was hanging out with an acquaintance of mine the other night and he was talking shit about K series transmissions. He was calling them glass transmissions and are known to be bad. He had also mentioned something about 3rd gear being the worse. I have not heard anything like this...
  20. 2013 Civic EX rattle/vibration sound under heavy acceleration - Anyone else pblm?

    Drivetrain Problems
    Hello I have a 2013 Civic ex sedan. It is the 5 speed automatic. Under heavy acceleration, I hear a rattling near redline in every gear (through 1st, 2nd, 3rd, etc). It seems to be coming from the shifter assembly inside the car. **I found that putting slight pressure (gently pulling shifter...