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Slipping clutch

This is a discussion on Slipping clutch within the Manual Transmission forums, part of the Drivetrain category; But get this...only at part throttle. Master = updated GM Slave = updated GM (spaced out with the SPEC provided ...

  1. #1
    Slow'er'Ass Mr. Luos's Avatar
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    Slipping clutch

    But get this...only at part throttle.

    Master = updated GM
    Slave = updated GM (spaced out with the SPEC provided spacer)
    Just rebleed to make sure that wasn't it.

    Flywheel = stocker (machined)
    Clutch = Spec 5

    It holds perfectly fine under WOT into 4th gear. Barks the tires and no slip.
    But if I punch it from 2500 RPM's or so in 3rd, 4th, or 5th it will spin up like it has a stall then grab in the upper RPM's.

    Now...the engagement point on the pedal is literally right at the top. Not even an inch of movement to disengage.
    Everything seemed fine up until recently. 3500 miles on the parts.

    Could the flywheel have been machined too much?? I made the mistake of not getting an exact amount taken off.
    What is too much?

    Thinking about trying a SPEC billet steel on it to see if that does it. Good idea? Bad??

    Any other ideas?
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    No ideas eh?

  3. #3
    Slow'er'Ass Mr. Luos's Avatar
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    Ordered a SPEC billet steel flywheel.
    Installing on the 11th.

  4. #4
    The Bandit Wesman's Avatar
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    Well I can tell you right now that the clutch should NOT be engaging that high on the pedal.

    That leads me to believe that something is way out of adjustment or spec. I believe that our hydraulic systems are self adjusting, so even if the clutch disc was worn down badly, it still should grab *near* the stock engagement point.

    Does your Spec 5 clutch have centrifigal weights on it?? Because that would explain why it doesn't slip at high RPM's, only at low RPM's. If the flywheel that you have is the improper thickness (too thick), that could cause clutch itself to be too close to the slave cylinder, which would cause the engagement point to be very high on the pedal, as well as put excessive wear on the T/O bearing and pressure plate fingers. It could also cause the clutch not to disengage all the way, if there is not proper clearance between the pressure plate and the transmission for the slave cylinder to release all the way.

    Hope you get to the bottom of it, let us know what you find out.

  5. #5
    Senior Member INMY01TA's Avatar
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    I wouldn't skimp on the clutch. I'd get a Mcleod or Text.

  6. #6
    Did you delete torque management recently??

  7. #7
    Slow'er'Ass Mr. Luos's Avatar
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    Doesn't have enough torque anyways.


    And I was right. But it damaged more than just the flywheel.

  8. #8
    Slow'er'Ass Mr. Luos's Avatar
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    It was more than just the flywheel.
    Overheating occured. We think it never really grabbed 100% thanks to the stock flywheel being taken down too far. Parts were fighting to hold.

    Pressure plate...


    Check out the cracks...


    Disc...


    Old stock flywheel...


    New SPEC flywheel...


    And how my car sits until Friday after work...




    New clutch coming soon.

  9. #9
    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
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    lookin good, man those old parts were BEAT

  10. #10
    Slow'er'Ass Mr. Luos's Avatar
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    3500 miles

  11. #11
    The Bandit Wesman's Avatar
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    Glad you got to the bottom of the issue

  12. #12
    Slow'er'Ass Mr. Luos's Avatar
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    Gets new clutch tomorrow.

  13. #13
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    pewter
    2001 z28 lingenfelter 383

    how do u like the nittos on the rear on the street??? how long do they last...how sticky?? im putting down ONLY 400 rwhp ( comprared to u only hehe) i need some dam grip

  14. #14
    Slow'er'Ass Mr. Luos's Avatar
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    They grab great compared to a street tire.
    Wear is rough. I figure 10,000 with them holding my power.

  15. #15
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    pewter
    2001 z28 lingenfelter 383

    10k is not bad..thats 2 seasons......all i EXPECT out of any real sticky tires is 2 seasons........getting 3 is a bonus!!!

  16. #16
    Slow'er'Ass Mr. Luos's Avatar
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    That is being easy on them.
    No racing.

    I run MT DR's for track.

  17. #17
    Slow'er'Ass Mr. Luos's Avatar
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    Well...I no longer have a stalled M6.

  18. #18
    The Bandit Wesman's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Well...I no longer have a stalled M6.
    Thats good lol.

    Hows the new clutch setup??

  19. #19
    Slow'er'Ass Mr. Luos's Avatar
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    I like it.
    I do need to get used to the new engagement point, but it drives nice.
    Little more street friendly.

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