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  1. #1
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    Chattering and winding noises

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    So a few days ago I noticed a weird winding noise almost as if the car was supercharged. Thought it could be the timing belt but happens when in gear (1-6) and accelerating. No noise free revving the car, sound goes away as soon as I let off the throttle or push the clutch in. I also get clutch chatter when idling, pushing the clutch in the chatter goes away. Car accelerates fine, goes into gears smoothly and is not slipping. Any ideas?
    16 Fiesta ST- Cobb Stage 1, Whoosh Intercooler, GFB DV, Stratified E30
    Evo 9- Full bolt-ons, FP 71HTA, E85 Self tuned

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    Member 173 Rep Points Krug's Avatar
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    Quote Originally Posted by Erbarry View Post
    I also get clutch chatter when idling with clutch depressed, pushing the clutch in the chatter goes away.
    This is confusing me - do you mean you get chatter when idling in neutral and the clutch pedal fully pressed down or with the pedal up? "Depressed" means "pressed down," because English is a hot mess.

    In any case, it sounds like you've got a bearing that is on its way out and causing the chattering at idle and the whine when under load. It could also be gear noise from low fluid level. Check your trans fluid level and see if your axle seals are leaking, which would be the most likely cause of a low fluid level.

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    I have a dual-mass flywheel that chatters with the clutch pedal out. It also has a loud clack as you load the trans from releasing the clutch pedal. Told the dealer about it (for a second time); they replaced the axle shafts which had no impact of course.

    Do you have the 2.1L of fluid in the trans to meet the 1" below fill hole specification? There hasn't been any reported failures, but some have noted a whine noise from the transmission. All of them had changed something or other to increase HP beyond stock.
    2016 Ford Fiesta ST Kona Blue ; Engine, Suspension will remain untouched ; Southwest Ohio ; Winter: 215/45R17 Continental ; Seasonal: 205/40R17 Bridgestone

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    I’ll check the fluid but I did replace it with Motul DCTF about 25k ago, I was going to replace it soon with the same fluid. There has been no signs of leaks on my driveway and I just rrplaced the engine oil and it was pretty clean under the engine/tranny.

    Quote Originally Posted by Krug View Post
    In any case, it sounds like you've got a bearing that is on its way out
    Throw out bearing? Which bearing should I be looking st?
    16 Fiesta ST- Cobb Stage 1, Whoosh Intercooler, GFB DV, Stratified E30
    Evo 9- Full bolt-ons, FP 71HTA, E85 Self tuned

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    Member 173 Rep Points Krug's Avatar
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    It could be. Has your clutch pedal feel changed since this issue began? That would be an indicator of a bad throwout bearing. If not, it could be another bearing in the transmission. Either way, start with the most simple/cheapest solutions and work up from there. Inspect the axle seals and fluid level first. Leaking/weeping axle seals will not necessarily leave stains under the car, as it may be a very slow leak and/or leak when the car moving instead of parked. A visual inspection will let you know for sure.

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    So I checked under the car no visible leaks, no residual fluid anywhere, seals were good. I drained the fluid and refilled it, measured fluid was around 1.5 manual says 1.6. Started the car, checked under there and the noise is coming from the transmission housing. The fluid was pretty dark with metal dust.
    Quote Originally Posted by Krug View Post
    It could be. Has your clutch pedal feel changed since this issue began? That would be an indicator of a bad throwout bearing. If not, it could be another bearing in the transmission. Either way, start with the most simple/cheapest solutions and work up from there. Inspect the axle seals and fluid level first. Leaking/weeping axle seals will not necessarily leave stains under the car, as it may be a very slow leak and/or leak when the car moving instead of parked. A visual inspection will let you know for sure.
    16 Fiesta ST- Cobb Stage 1, Whoosh Intercooler, GFB DV, Stratified E30
    Evo 9- Full bolt-ons, FP 71HTA, E85 Self tuned

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    1.5l is actually quite low, at least to me. IIRC our transmissions come with about 1.7l of fluid from the factory, which many consider to be underfilled, and the common recommendation is an even 2.0l of fluid. The condition of your fluid also sounds very concerning. It seems to me as though you've got one or more bearings somewhere in the transmission that was starved of lubrication and got smoked. Hate to say it, but you're probably looking at getting some serious trans work done to resolve the issue.

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    Senior Member 1118 Rep Points TyphoonFiST's Avatar
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    Quote Originally Posted by Erbarry View Post
    So I checked under the car no visible leaks, no residual fluid anywhere, seals were good. I drained the fluid and refilled it, measured fluid was around 1.5 manual says 1.6. Started the car, checked under there and the noise is coming from the transmission housing. The fluid was pretty dark with metal dust.
    What's the mileage of your vehicle? You may still be under powertrain warranty...Unless your out by mileage....
    Is this your bush? Are you king of the forest?

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    The manual states 1.6l dry fill, I have a 2016. I’m at 52k so I believe I’m good to go on the warranty side, and will take in tomorrow.

    So I just looked into it and many have said they’ve filled the tranny with 2l fml.
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    Quote Originally Posted by Erbarry View Post
    The manual states 1.6l dry fill, I have a 2016. I’m at 52k so I believe I’m good to go on the warranty side, and will take in tomorrow.

    So I just looked into it and many have said they’ve filled the tranny with 2l fml.
    This is one of the very rare instances where you should just ignore what the manual states. 1.6l leaves very little room headroom for error or mishap, like say if you developed a leak. A 2.0l fill will NOT harm the transmission in any way, and will help guarantee good lubrication and healthy operation with the only drawback being a possible but very minor and nigh imperceptible reduction in fuel economy.

    I hope you can get your transmission replaced under warranty, and then you can replace the factory fluid with 1.80l to 2.0l of something nice like Motul Multi DCTF, Motul Gear 300 75W-90, BG Synchro Shift II, or Ravenol 75W-80 MTF-2.

 

 
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