What did you do to your Fiesta ST today ?

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I can second @SteveS... do NOT hold the clutch pedal down at traffic lights for the Fiesta ST.
There has been enough members reporting clutch hydraulic issues that I've considered it legitimate and not customer abuse or just, "Murphy's Law".
I did this for well over 250,000 miles on a prior car but its slave cylinder was on the outside of the transmission, attached to the bell housing; and never had issue an issue. I had to replace only the clutch master cylinder once in its 327,000 mile ownership. (leaked brake fluid onto the floor of the passenger cabin) The slave never had to be replaced. My FiST is <80k but could tell the clutch hydraulic was starting to behave a little differently. I quit holding the pedal at lights and so far I haven't detected the behavioral change again; though it has mostly been parked since Oct 2024.

The slave cylinder is inside the transmission and the seals seem to be vulnerable to the additional heat transfer that occurs when pushing the clutch spring. Seal failure, which can leak either by pushing out fluid or allowing air entry, for the slave cylinder means pulling the transmission. If there's anything we can do to stave that off, I'd certainly do it.
Great info, thanks.
i usually coast up to lights in neutral...i guess ill have to pay attention to how i chill at red lights now.
 


Grsemky

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Had a charge hose pop off while running errands, luckily I was able to get to it after removing the passenger headlight... Damn was it gutless N/A🤣
 


Grsemky

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Took mine in for the weekly carwash and detail.
I park in dirt lots at home and at work. so its a must.
Arizona life is dusty.
Especially on our dark paint, I washed mine and go back out later and there's a fine dusting covering the car😩😩 honestly though all the rock chips on the hood is what gets me, damn road construction!!
 


rallytaff

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I can second @SteveS... do NOT hold the clutch pedal down at traffic lights for the Fiesta ST.
There has been enough members reporting clutch hydraulic issues that I've considered it legitimate and not customer abuse or just, "Murphy's Law".
I did this for well over 250,000 miles on a prior car but its slave cylinder was on the outside of the transmission, attached to the bell housing; and never had issue an issue. I had to replace only the clutch master cylinder once in its 327,000 mile ownership. (leaked brake fluid onto the floor of the passenger cabin) The slave never had to be replaced. My FiST is <80k but could tell the clutch hydraulic was starting to behave a little differently. I quit holding the pedal at lights and so far I haven't detected the behavioral change again; though it has mostly been parked since Oct 2024.

The slave cylinder is inside the transmission and the seals seem to be vulnerable to the additional heat transfer that occurs when pushing the clutch spring. Seal failure, which can leak either by pushing out fluid or allowing air entry, for the slave cylinder means pulling the transmission. If there's anything we can do to stave that off, I'd certainly do it.
You should be in neutral at red lights with your left foot NOWHERE near the clutch. Riding the clutch is a huge NO-NO!
 


Ricky_Bobby_24

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Not today but this weekend I got to knock out a huge bucket list item. Drove it on the Nürburgring Nordschleife for a few laps. Naturally I was standing still compared to the Porsche and BMW's.
Learned a ton and look forward to going back again before I return stateside in the near future.
These track photographers sure have skill and I was able to snag a few beautiful shots.
Screenshot 2026-06-17 003000.png
 


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