2017 s550 gt 6 speed won’t shift into gear

Discussion in 'GT350 and S550 Technical Forum' started by Wotfun, Oct 7, 2019.

  1. Wotfun

    Wotfun TMO Advanced

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    Apologies if there’s another post that already addresses this. I searched repeatedly with no luck.

    I drove my mustang at an HPDE at VIR 2 weekends ago. Halfway through my last session on Sunday afternoon, the car would not go into gear while the engine was running and it started making a high pitch whining noise.

    I got a uhaul and towed it home. Now it’s sitting at the Ford dealer. They said it would be about 2 weeks before anyone could even check it. (It’s been there a week so far.)

    The car has less than 18k miles and 4 track weekends - about 16 twenty minute sessions.

    Any thoughts/suggestions?
     
  2. TMSBOSS

    TMSBOSS TMO Addict

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    Throw out bearing and or clutch are the likely causes.
    Should be covered under warranty
    Good luck with repairs.
     
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  3. Wotfun

    Wotfun TMO Advanced

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    Thanks! That’s what I was thinking too. Also, wondering if it’s just gonna break again. (For comparison, my last track car was a 60k mile BMW Z4 6 speed, with original clutch, transmission, and all related parts. Of course it didn’t have near the power or torque of the mustang, but I drove it harder than the mustang and it never gave any sign of a mechanical problem.)

    Is the s550 really up to long term track use, without having things breaking?
     
    Last edited: Oct 7, 2019
  4. JeffV8

    JeffV8 TMO Race

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    My clutch came apart at 5000 miles. Ford dealer installed the Exedy clutch kit which I bought. Dealer told me they ate the labor $$ saying ford said it was a consumable item. They found out after they pulled everything out of my car.. Good Luck
     
  5. Wotfun

    Wotfun TMO Advanced

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    I get that the clutch is a wear item. BUT, I’ve never dropped the clutch, never done a burnout, and rev match my downshifts. I don’t think I’ve done anything that should cause a clutch, or anything related to the drivetrain, to fail.

    Do you know why your clutch failed so soon?
     
  6. steveespo

    steveespo Lord knows I'm a Voodoo Child Moderator

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    OEM Valeo clutches don’t like high rpm and failure rate at tracks is fairly high. A high performance clutch should be an expected expense at some point. The higher you rev and harder you drive, the sooner the change.


    Sent from my iPhone using Tapatalk
     
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  7. JeffV8

    JeffV8 TMO Race

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    E22F52B2-A3F8-4529-A7A4-2A0D962D1B09.jpeg 6CF09EEC-D833-42E1-A892-21E32B639921.jpeg 86F51C8B-81D3-45C7-B94D-9EADFCA601D0.jpeg I only do SCCA track nights. No burnouts either. From what I have read it happened a lot.
     
  8. Wotfun

    Wotfun TMO Advanced

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    @JeffV8, I appreciate the additional info and pics. Sure hope your new Exedy clutch holds up better for you.

    @steveespo, Thanks for the insight re oem clutch not liking high rpms.

    It still seems odd to me that my 10 year old bmw with more than triple the miles had zero mechanical issues with all stock/standard parts and my practically new “performance pack” mustang is already having issues that make it undriveable. If anything, I drove the bmw harder than the mustang and for more track events.
     
  9. steveespo

    steveespo Lord knows I'm a Voodoo Child Moderator

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    They don’t like back torque from high rpm downshifts, that’s what fails the disc facings. The high rpm also causes the diaphragm on the pressure plate to overcenter and that is the pedal to the floor symptom. 2015-20 GT350/2018-20 GT dual mass flywheel and clutch seems to perform better at high rpm but it is real heavy and involves swapping a lot of parts.


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  10. Wotfun

    Wotfun TMO Advanced

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    @steveespo, That’s helpful. Does rev matching on high rpm downshifts address the problem?

    When mine failed, my clutch did go to the floor with only minimal resistance near the end of the normal clutch travel. Almost like the brake feels with boiled fluid and the associated fade.

    Considering that I do want to continue tracking my car, what upgrades are recommended? I’m guessing an aftermarket clutch. Maybe one rated for much higher horsepower? Does anything else need to be upgraded?
     
  11. Wotfun

    Wotfun TMO Advanced

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    Update: Ford dealer looked at my car yesterday. They said clutch friction material came off. Ford is covering under warranty.

    I was thinking about asking them to install an aftermarket clutch. Service advisor said he thought they’d do that, similar how Jeffv8’s was handled. But, he also said if anything went wrong related to the aftermarket clutch parts, Ford warranty would not cover it.

    Then he told me about another customer who’s clutch came apart. One of the springs in the clutch came loose. When he tried to start the car, the spring somehow jammed the starter. The torque from the starter trying to spin broke the piece off the engine block that the starter mounts to. Since the problem was due to oem parts failure, Ford fixed it under warranty, including a new short block.

    So, I’m going to stay stock until the warranty expires. Then I’ll learn how to install an aftermarket clutch.
     
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  12. JeffV8

    JeffV8 TMO Race

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    Wotfun I would put in the after market setup. You would have to buy it yourself. They wouldn’t put a Ford performance clutch in it. That’s when they said if I bought my own they would install it. After they did all the work on it they found out ford wouldn’t pay them for warranty work. I didn’t pay them a dime for labor.
     
  13. Wotfun

    Wotfun TMO Advanced

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    Update #2: The clutch was covered under warranty because the friction material just came apart in chunks. If it had just worn down, similar to the way brake pads wear down, it would’ve been treated as a wear item. Interestingly, the service advisor wasn’t sure if the 5 year/50k mile power train warranty would provide the same coverage.
     
  14. Wotfun

    Wotfun TMO Advanced

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    My understanding is parts and labor for mine are being covered under warranty. Mine looked like yours though - pieces of the friction material just broken off the rivets. My service advisor said my driving didn’t cause the failure. He said it was something defective about the clutch.
     
  15. Wotfun

    Wotfun TMO Advanced

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    How do you like your Exedy clutch so far?
     
  16. JeffV8

    JeffV8 TMO Race

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    Works good. I stall it at the traffic light once in awhile lol
     
  17. Wotfun

    Wotfun TMO Advanced

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    Awesome! Guessing you stall it occasionally because it engages a little more abruptly than the oem clutch?
     
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  18. JeffV8

    JeffV8 TMO Race

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    Yes 90% of the time no problem. lol
     

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