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My SPEC clutch gave up....

This is a discussion on My SPEC clutch gave up.... within the Manual Transmission forums, part of the Drivetrain category; ... the ghost Thursday. It went from slipping badly to a metal on metal screatching sound, so now it's parked ...

  1. #1
    Bad habbit- Smoking Fords
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    Sunset Orange Metallic
    2001 Camaro SS

    Thumbs down My SPEC clutch gave up....

    ... the ghost Thursday. It went from slipping badly to a metal on metal screatching sound, so now it's parked awaiting the arrival of my LS7 clutch kit I ordered last Tuesday.
    2001 SS - 430 RWHP 412 RWTQ
    6 spd, FIPK, Corsa exhaust, LS7 clutch, Dart Pro PP LS1 heads, custom 220/224 cam, Kooks LT's. Ported TB, Full suspension, C5 ZO6 brake upgrade.

  2. #2
    Every day is a gift-enjoy preston1980's Avatar
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    Torch Red
    1999 Corvette Hardtop

    what kind of spec did u have? 3 or 4 or 3+ or what.
    How long did it last u?

    how much horsepower do u have?

  3. #3
    Bad habbit- Smoking Fords
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    Sunset Orange Metallic
    2001 Camaro SS

    I had a SPEC Stage II and about 425 hp at the crank. It lasted me only about 15,000 miles. Not enough to cause a stock clutch to slip let alone a stage II clutch.

  4. #4
    Every day is a gift-enjoy preston1980's Avatar
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    Torch Red
    1999 Corvette Hardtop

    the reason I ask is, I recently put in a spec 3+ clutch with an aluminum flywheel in my 99 t/a. I have 2 thousand miles on it and so far I love it. It was hard to break in, it took 1500 miles, but now I am loving it.

    I only have 350 horses or so, so I am thinking Im ok with it.

    It sure would suck if it sliped at 15k miles, I would be pissed, I spent a grand on everything total: (slave and master cylinder, clutch disk, lightweight pressur plate, aluminum flywheel, and tranny mount) not including labor

  5. #5
    Senior Member Zboner's Avatar
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    i have not heard really anything good about SPEC

  6. #6
    Story of My Life!! BIG D's SS's Avatar
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    I think it is like anything else there is good and bad. I have a complete Spec 3 plus with flywheel and and new hadraulics to go in mine just whenever I decide to put it in. Did you have a new flywheel or have your stock one turn when you put the Spec 2 in? I know that is a requirment and did you have the shim in there? Just want a little more info on the situation.

  7. #7
    Bad habbit- Smoking Fords
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    Sunset Orange Metallic
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    Quote Originally Posted by BIG D's SS
    I think it is like anything else there is good and bad. I have a complete Spec 3 plus with flywheel and and new hadraulics to go in mine just whenever I decide to put it in. Did you have a new flywheel or have your stock one turn when you put the Spec 2 in? I know that is a requirment and did you have the shim in there? Just want a little more info on the situation.
    I put in a SPEC steel flywheel and the shim with the clutch and pressure plate. I will have picts of the old flywheel, clutch and pressure plate as soon as I'm finished installing the LS7 clutch.

  8. #8
    Senior Member INMY01TA's Avatar
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    Spec clutches are pieces of crap! This is old news.

  9. #9
    Senior Member Hurley711's Avatar
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    414 RWHP 395 RWTQ
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    LS7/LS2 combo here and so far so good.....380+ to the wheels

  10. #10
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    After doing quite a bit of research, it seems all the clutch houses use the same pressure plates for the different brands. I don't know how many different actuall manufactures of these there are, but I bet I would not need the all the fingers on one hand to keep track.
    I am in a slightly different boat, I have an LT1, but use an internal slave, so I have hung out here an a few other places ocasionally to gain any knowledge that I could.
    At the most, clutch houses will change the spring fulcrum point to adjust the leverage of the pressure plate. From what I gather, most of them just give them a spiffy paint job. Take a close look at the pressure plates available from someone like Hays, who has a great web site showing lots of different PP's, and compare. Same hat, same spring, etc.
    So that leaves the "easy" part, the disc to come up with something else to market. Your down to configuration choices basically. It is truely a tough compromise, streetability vs. holding power. Organic on the low end, Iron on the extreme end.
    Just my observation, but NO ONE that I have seen has it all. High power, excellent street, and MORE than say, 50K miles, most have much less before failure. If you have high power, race, love to play, etc, you are gonna pay. I am in the middle of a tranny drop right now with a mutt setup. But having a mutt setup has forced me to spend HOURS on the internet reading up on everything I can find.
    Just my observation, worth what you paid for it, etc. But I really think there is no holy grail yet.

  11. #11
    Bad habbit- Smoking Fords
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    Sunset Orange Metallic
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    Quote Originally Posted by INMY01TA
    Spec clutches are pieces of crap! This is old news.
    Thank you for your extremely insightfull opinion. Yes I do aggree SPEC clutches are not good daily driver clutches.

    Moving on now, I have just finished the install of the LS7 clutch kit and it is a beautifull thing. The holding power of a Stage III clutch with OEM diveability.

  12. #12
    Senior Member INMY01TA's Avatar
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    They're not good for anything. A guy in our club (EFA) had one blow up on him years ago and NO ONE around here has ever used one since. There are lots of threads like this one posted on Tech proving nothing much has changed. READ THIS. http://www.ls1tech.com/forums/showth...highlight=spec

  13. #13
    Bad habbit- Smoking Fords
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    Sunset Orange Metallic
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    I know all about the exploding clutches, I sell lots of SPEC clutches and mine is the first I've ever had a failure with. Just look at the picts of this clutch after only 10K miles of daily driving!


  14. #14
    The Pulse of the Maggots SicWs6's Avatar
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    1999 Trans Am WS6

    where can you purchase the ls7 clutch and flywheel?

  15. #15
    seriousblack
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    I just ordered a spec stage III + clutch. I'm curious how's yours holding up? Are you racing often? Powershifting? I had a RAM Powergrip Rated @ 600Hp-It started slipping a few days ago after I started powershifting the car. I have an 02 SS Dynoed 387 Rwhp. ..........Thanks

  16. #16
    seriousblack
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    OH GREAT! I just ordered a Spec III+ Thinking it was better than the RAM Powergrip 600hp clutch that just took a shit on me! Why do you say that? whats not good about them?

  17. #17
    seriousblack
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    Wahts up with the LS7 Clutches? Are they better than the aftermarket products from Spec, Ram, Zoom etc? Please educate me..........Thanks

  18. #18
    COME AT ME BRO Soltakr's Avatar
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    I have spec 2 with 150 shot wet kit and it's holding up so far. I'd say about 10,000 mile on it so maybe I'm do for a grant finally. They do chatter from time to time. I sell a lot of different clutchs for C5/C6 corvettes mainly. The Exedy clutch are just awesome but the price is very high about $1,400 -$1,800. In my opinion and the techs at my shop, we are leaning towards the Luk Gold edition clutch. Holds good with very smooth pedal pressure for daily driving. Its the same one the Lingenfeter uses for there twin turbo cars. Look it up, maybe it can help.

    Just my 2 cents, drive safe eveyone

  19. #19
    Every day is a gift-enjoy preston1980's Avatar
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    1999 Corvette Hardtop

    All I know is: My spec 3+ is working great for now, I power shift it hard and it takes it every time. No slipping at all. NO vibrations. scratch 3rd every time. Rev it to 6 grand and drop it, it works perfect.

    The spec 3+ has a metallic clutch disk, which ingages hard, yet still wears good. It is very aggresive.
    As far as chatter goes, you just have to learn how the clutch works, once your used to it, no chatter, if someone else drives your car, chatters alot

    I think the drill mod really helps clutches last longer. It stops the alot of the slipping on engagement. Probally not good on your tranny gears, but I hear the 6 speeds are pretty tough.

    So spec gets my vote.

  20. #20
    Bad habbit- Smoking Fords
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    Sunset Orange Metallic
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    I also sell alot of clutches for LSx engines and have found that virtually all the aftermarket clutches (except for the LUK Pro Gold) are hit or miss. Some work great, some just don't last. LUK is the OEM manufacturer of the LS7 clutch and seems to be the only "aftermarket" clutch that works consistantly well. This of course is just my 2¢.

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