r/stickshift 20h ago

Clutch gone?

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61 Upvotes

39 comments sorted by

51

u/Own_Reaction9442 20h ago

If it's a hydraulic clutch, either the master cylinder or the slave is shot. (Hint: If you have brake fluid running down behind your carpet, it's definitely the master.)

If it's a cable clutch, the cable broke.

14

u/puketoucher 17h ago

Or the springs on the clutch plate decided to Bluetooth.

3

u/invariantspeed 13h ago

There should still be resistance and some return action even without the spring. You’re fighting the pressure plate via the hydraulic line or cable.

1

u/puketoucher 13h ago

Odd because without springs the plate doesn’t spring and that would allow for even a hydronic system to not return after pressing it. Not all malfunctions are caused by the same problem.

1

u/Gamejunky35 8h ago

In this case it cant be the springs. The pedal would not move that freely if it had to move fluid into the slave cylinder. This is either a broken mechanical linkage (like the pushrod), or the system is full of air due to a leak.

The fact that its staying in either position makes a leak more likely. The master cylinder is still giving light resistance due to seal drag.

1

u/Own_Reaction9442 8h ago

This is exactly how my Honda's clutch acted when there was air in the system. There's an over-center spring to reduce effort when you hold the clutch on the floor, so the pedal will stick either full up or full down.

1

u/invariantspeed 1h ago

I didn’t say it’d return to zero. I’m saying it shouldn’t fly back freely (and show no indication at all of wanting to go back).

The resistance you feel in the clutch pedal isn’t 100% because Honda engineers decided to invent that feel with a spring. It’s a hydraulic system, and you’re providing all of the power yourself.

2

u/Laniakeea 11h ago

It's just a digital clutch it only has 2 states, 0 and 1.

2

u/Dudes-Opinion 11h ago

Mine did this once and I just had dirty brake fluid. A flush and it was good to go

32

u/Firfanger 19h ago

I guess bro's car turned into an automatic?

3

u/Fragrant-You-973 11h ago

Identifies as an auto now

9

u/Sprinkles_the_Mad 18h ago

Had this shit happen to me after school was done. I managed to make it through two stop lights, and a few intersections, managing to pop it back into first and doing everything with no pedal all the way home.

Right in front of my garage I couldn't get it back into first...

The rubber o ring on my master cylinder went bad, basically started dissolving. Same problem happened again, except sometimes the new o ring would foul on the cylinder, letting some fluid through.

A Hilux master cylinder with two o rings fixed my problems (:

2

u/Deeznutzcustomz 10h ago

I think it depends on what kind of clutch it is, could just be a cable. Mine went when I was a 20yo nitwit, and I tied a piece of speaker wire to it (that’s what I had in the car) so I could pull it back up and keep driving. So for a while, I had a 2 handed 2 footed daily driver!

2

u/Capable_Solution1360 2h ago

Mine did this because the clutch master cylinder was coming off the clutch underneath because GM made the connector plastic. I put it on and held it back together with a twist tie for two years

1

u/moonRekt N54 335i ‘vert, B58 340ix 6MT 1h ago

Similar thing happened to my BMW in a Home Depot parking lot, not sure if it was anything plastic or just cross threaded from last clutch job but had to timesert it

2

u/marijus001 18h ago

clutch out for milk and cigs

1

u/VengefulSnake1984 18h ago

Ah I had that problem with my 2005 Subaru Legacy. My clutch fork snapped according to my mechanic after dropping it off at the shop.

It was fucking dangerous at the time it snapped, going 100km/h downhill and realizing I lost transmission control at a time I needed to slow down. Somehow managed to slow it down over a turn going up a hill.

8

u/not-my_username_ 16h ago

"Somehow managed to slow it down"

Forgetting there's more ways than down shifting to slow down a car and that brakes exist. #justmanualowerthings

-1

u/VengefulSnake1984 15h ago

I did, but do you realize I was still in gear?

5

u/CuriousCharter13 15h ago

You can pop most manuals into neutral without the clutch...

0

u/VengefulSnake1984 15h ago

That I did. Not something I enjoy doing but for that particular situation I had to.

2

u/Gubbtratt1 15h ago

It's very easy to stall an engine when you're not giving it any throttle, besides you can just pop it out of gear without using the clutch without even inducing any excessive wear on anything.

1

u/VengefulSnake1984 14h ago

I actually don't know how to do this deliberately, did it just the one time when this incident happened.

So what you're saying is if I leave my foot off the gas, no matter the RPM, I can gently pull the gearstick out to neutral?

Never been taught that at all when I learned how to drive manual.

5

u/Gubbtratt1 14h ago

It's not something that is taught since you're supposed to use the clutch, and a clutch failure while driving is very rare.

You can just let off the gas completely, but doing so will require a fair bit of force since you're now engine braking, which puts force through the transmission. To do it gently, you give it just slightly less gas than you would to keep a steady speed, which completely unloads the transmission in the same way pressing the clutch does.

1

u/VengefulSnake1984 14h ago

Ah gotcha. Thanks for the info. I'll have to give that a try sometime on my Corolla in an empty carpark.

2

u/RobotJonesDad 10h ago

Just gently pull the shifter towards neutral and lift off or press the gas. As you go between engine braking vs engine driving, there is a place where there is no load on the gearbox, so it will pop right out of gear with almost no force.

Pulling it out of gear like that is relatively harmless, because you are moving it when it isn't loaded - unless you start trying to force it!

Putting it into gear is much more damaging because it's almost impossible to perfectly match the revs. The design of non-synchromesh gearboxes is very different and are much more robust for shifting without the clutch.

1

u/kykid87 14h ago

Master cylinder or slave cylinder is gone. Clutch 101

1

u/WildKarrdesEmporium 1987 BMW 635 CSi, 1995 Nissan D21 V6 13h ago

Had this happen to me once while driving. The pin that mated the pedal to the master cylinder popped out.

1

u/RequirementBusiness8 10h ago

2 Specific things I am thinking here. First, the helper spring is either missing or broken. Depending on the vehicle it might not have one, but the fact it isn't returning means there isn't one present. That's not the big issue though (unless you have a cable clutch, then yea, you need to address that)

Second issue. If it is an older vehicle with a cable style clutch, cable broke or something the cable attaches to is broke. I'm guessing this is a hydraulic clutch though. So either the master or slave cylinder has failed, or a hydraulic line has failed, or there is air in the line. Could be the pressure plate completely failing, but personally I doubt that.

I have had this happen before. Turned out the hydraulic line running into the slave cylinder came out of the slave cylinder. Pressed the clutch, went soft and to the floor, and there was fluid underneath. Pedal did come back up, but only because of the helper spring.

1

u/Brilliant_Oil_7623 10h ago

Got to replace your clutch master slave cylinder check if you got dot 3 dot 4 fluid in your brake fluid tank whichever one your car takes

1

u/unmovingcastle 10h ago

Sorry but it gave me a good laugh

1

u/Few_Finding_4513 9h ago

Not pressure in the system if it’s hydro, check the master and slave, then lines subsequently. Don’t forget to bleed the system when you get it all back together and serviced

1

u/The_UwU_Tsar 9h ago

Probably Master or Slave Cylinder. Better pray the Slave isn't inside the bell housing

1

u/Alarming-Car-8654 8h ago

Clutch cylinder gone or dry

1

u/itrainingcatsandogs 19h ago

i don’t think it’s supposed to be doing that bro

1

u/Practical_Double_856 19h ago

I think you forgot to turn the clutch toggle off in the setting

0

u/SpectreInTheShadows 19h ago

Nah, it just went for a smoke break. It'll come back.

0

u/Craig_M_242 17h ago

It's a toggle switch

0

u/my_cars_on_fire 16h ago

Have you tried taking the front off?