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Clutch Hydraulic Line Peak Torque Limiter

Silverstone

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Does anyone know definitively whether the 90 degree elbow between the hydraulic clutch line and the transmission has a clutch delay/one-way restrictor valve in it? The following TSB for the S550 directing replacement of that part in case people have certain issues with their clutches refers to the elbow as a "Peak Torque Limiter." I'm pretty certain we have this "Peak Torque Limiter" in our S650's as well.

https://www.mustang6g.com/forums/at...lutch-failure-peak-torque-limiter-pdf.745580/

I haven't found anything definitive on the question, but it seems to me that elbow wouldn't be capable of limiting anything if it were a simple hollow elbow.

Long winded reason for my inquiry: I've settled on completely removing the clutch spring after trying the Steeda clutch spring. I've read about potential long term implications of completely removing the clutch spring. That's life, I'll live with it. My impressions are that the car is much easier to drive smoothly 1st through 3rd gear with no clutch spring at all vs the stock clutch spring or Steeda. Never had issues with 3rd-6th. The Steeda noticeably reduced the clutch assistance from the stock spring but for me did not improve clutch friction point feel at all or make the car much easier to drive smoothly. After decades of driving nothing but manuals, this car was making me look like a newb with all the herky jerky clutch action in low gears/low speeds.

With no clutch spring, I can actually detect a friction point through my foot, though just barely. This tells me there is feel to be had. The question is, how much more, and is it being dampened by the "Peak Torque Limiter"? If the "Peak Torque Limiter" is essentially a "Clutch Delay Valve", I believe it is the major culprit for the poor clutch feel in this car.
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Skye

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I can't speak to the innards of the valve. But a hollow joint could limit fluid flow. The smaller or larger the orifice, the lesser or greater amount of fluid volume passing at a timed interval.

You've removed the spring and gotten close to the feel you're looking for. IDK if any of the tracking forums have threads of owners, mods they made to their valves or setups to dial in and get to where they want it.

Some are good on the stock spring and setup. Two days after receiving my car, I changed to the Steeda spring and haven't looked back. One I remember experimented with different springs to get the feel they were looking for. Others have removed it.

The valve though...unfortunately, I can't remember anyone removing or changing the valve and the effects afterward. The Hitmaster system referenced in the 6G thread, is more for drag racing applications vs. DD.
 
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Silverstone

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Not sure why you say I'm close to the feel I'm looking for.

Anyone know what the inside of that elbow looks like/is comprised of?
 

Skye

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Not sure why you say I'm close to the feel I'm looking for.
My bad. In removing the spring, I thought it took you towards the direction you were hoping for, but didn't get you all the way there.
 
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Silverstone

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My bad. In removing the spring, I thought it took you towards the direction you were hoping for, but didn't get you all the way there.
I'd say this is an accurate statement. I'm just not close to where I think it could be, if in fact there is what is essentially a clutch delay valve in the elbow. It's better, but still not good. In other manual cars I've owned with a CDV, removal made a world of difference...or just made the clutch feel normal. 🤨

If no one knows I might just pull one from a boneyard and dissect.
 


Zig

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I'd say this is an accurate statement. I'm just not close to where I think it could be, if in fact there is what is essentially a clutch delay valve in the elbow. It's better, but still not good. In other manual cars I've owned with a CDV, removal made a world of difference...or just made the clutch feel normal. 🤨

If no one knows I might just pull one from a boneyard and dissect.
Curious if any techs that performed the clutch line recall might be able to share some insight.
 

John S

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McLeod's clutch line kit includes a new elbow fitting with a bleeder. Why would Ford's OEM peak-torque-limiter fitting or any other aftermarket fitting want a restriction anywhere in that circuit?

S650 Mustang Clutch Hydraulic Line Peak Torque Limiter 1763770970696-d
S650 Mustang Clutch Hydraulic Line Peak Torque Limiter 1763770650919-9q
 

gbadger

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It’s interesting no one makes these for the tremec in the DH. I’ve been searching for a few months.
 
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Silverstone

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Curious if any techs that performed the clutch line recall might be able to share some insight.
Someone with this experience chiming in to answer the question would be awesome.
 

John S

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It’s interesting no one makes these for the tremec in the DH. I’ve been searching for a few months.
Attached is the 2022 shop manual illustration for the TR3160 clutch line. I didn't realize Ford had the recall referenced in the opening message but the hydraulic system seems the same as the MT82. Why would Ford change any of this on the 2024+ applications, It would be nice to hear from an expert what's unique about this circuit and the 90 degree fitting?

S650 Mustang Clutch Hydraulic Line Peak Torque Limiter 1763782161423-01


S650 Mustang Clutch Hydraulic Line Peak Torque Limiter 1763780552931-4g
 

gbadger

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Attached is the 2022 shop manual illustration for the TR3160 clutch line. I didn't realize Ford had the recall referenced in the opening message but the hydraulic system seems the same as the MT82. Why would Ford change any of this on the 2024+ applications, It would be nice to hear from an expert what's unique about this circuit and the 90 degree fitting?

1763782161423-01.webp


1763780552931-4g.webp
I don’t know. Ive called multiple vendors. They all say the tremec line is different and know one makes a kit for it yet.
 
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Silverstone

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this car was making me look like a newb with all the herky jerky clutch action in low gears/low speeds.
So....to followup, in the past week I took the car into the dealership for some drivability issues I was having. After scanning the car and looking through its dealer history, they found that while the car was on the lot before I purchased it, the car threw P2122 and P2127 codes for a throttle position sensor issue. I was told the codes were never fully cleared, so they did so.

Since getting the car back, over the last couple days the herky jerky clutch engagement action is basically gone. Low speed clutch engagement, rev matching, heel/toe-ing are all much improved. I don't have to think so much about trying to be smooth around a clutch that tended to operate like an on and off switch and was also inconsistent in engagement. In short, the majority of my clutch drivability issues may have actually been related to a throttle position sensor issue. Crossing fingers that this result sticks and it's not a flash in the pan.

I purchased the Mcleod clutch line and bleeder elbow kit but haven't installed it yet. Will follow up once I do to note what I find as far as what's inside the stock elbow and any differences/improvements/issues with the Mcleod kit.
 
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John S

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Good luck, let us know if the bleeder makes any difference in requiring endless pedal depressions to get all the trapped bubbles out.
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