LS9 Clutch Carnage
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2004-2007 Cadillac CTS-V Performance Mods Discussion, LS9 Clutch Carnage in Cadillac CTS-V Series Forum - 2004 - 2007; Broke the pressure plate last Tuesday night. One of the fingers broke and took out the starter housing and blew ...
  1. #1
    PISNUOFF Guest

    LS9 Clutch Carnage

    Broke the pressure plate last Tuesday night. One of the fingers broke and took out the starter housing and blew a couple holes in the bell housing.










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  3. #2
    jpoole's Avatar
    jpoole is offline Cadillac Owners Fanatic
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    Re: LS9 Clutch Carnage

    Damn man. Were you having a vibration problem at 1800 - 2300 and then gone just due to the increased RPM? I put a kit in and am having the vib problem. I had it balanced yesterday and am waiting for the reinstall, but I won't be getting this back till tomorrow. The way mine was vibrating, seemed like it would cause a failure. I had both my clutch and flywheel balanced and was told that both were way out of neutral balnance. Just hoping neutral balance is correct as every vendor / manufactorer has said they were but the service manual is different.

    Also, did you use new GM bolts or ARP?

  4. #3
    PISNUOFF Guest

    Re: LS9 Clutch Carnage

    That's an LS9 pressure plate that failed in 4th gear at 5500 rpm. It went 'bang' and I couldn't disengage the clutch anymore. I had to shift with the clutch the rest of the way home.

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  6. #4
    whisler151's Avatar
    whisler151 is offline Cadillac Owners Connoisseur
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    Re: LS9 Clutch Carnage

    Damn. That sucks. I bet that bang scared the sh*t out of you.

  7. #5
    CancerJCC is offline Cadillac Owners Connoisseur
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    Re: LS9 Clutch Carnage

    Quote Originally Posted by whisler151 View Post
    Damn. That sucks. I bet that bang scared the sh*t out of you.
    Yeah ouch. Sucks Brian, why do you figure it failed? Just a normal defect within tolerance and you got "unlucky" or something wrong completely?

  8. #6
    PISNUOFF Guest

    Re: LS9 Clutch Carnage

    Quote Originally Posted by whisler151 View Post
    Damn. That sucks. I bet that bang scared the sh*t out of you.
    Heck yeah it did. It was full bore 4th gear. I'm thinking it had to be a manufacturing defect because I can't believe that I'm the only one consistently punishing this clutch.

  9. #7
    crankedupforit's Avatar
    crankedupforit is offline Cadillac Owners Connoisseur
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    Re: LS9 Clutch Carnage

    Quote Originally Posted by PISNUOFF View Post
    Heck yeah it did. It was full bore 4th gear. I'm thinking it had to be a manufacturing defect because I can't believe that I'm the only one consistently punishing this clutch.
    I'm sure your right about that. The LS9 clutch is a mature well engineered piece.

  10. #8
    CI-V-IL is offline Cadillac Owners Fanatic
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    Re: LS9 Clutch Carnage

    OUCH! At least you got a new sig out of it:

    PISNUOFF
    Exploding LS9 Clutches Like It's My Job.
    Cadillac(s) I Drive:2007 CTS-V

  11. #9
    rjoffe is online now Cadillac Owners Connoisseur
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    Re: LS9 Clutch Carnage

    Quote Originally Posted by PISNUOFF View Post
    4th gear at 5500 rpm.
    That's moving right along!

  12. #10
    shadybx7's Avatar
    shadybx7 is offline Cadillac Owners Connoisseur
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    Re: LS9 Clutch Carnage

    the fatty strikes again.. Katech giving you any hassle about getting it warrantied for a defect?

  13. #11
    PISNUOFF Guest

    Re: LS9 Clutch Carnage

    I didn't buy it from Katech. I Only bought the flywheel from them. I deal with Luke for all my stock GM parts. I'm sure there isn't going to be a problem getting the issue taken care of.

  14. #12
    c4ss's Avatar
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    Re: LS9 Clutch Carnage

    That's a serious clutch you just shredded. Here's to hoping it's a defect

  15. #13
    PISNUOFF Guest

    Re: LS9 Clutch Carnage

    I am pretty sure it was a defective strap, although the other ones seem to have some discoloration from heat. At least after 3000 miles, the mating surfaces still look perfect.



    Here is the discoloration.


  16. #14
    rand49er's Avatar
    rand49er is offline All V1s should be maggied.
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    Re: LS9 Clutch Carnage

    I can just hear the racket in those first few pics ... must've a bit noisy.

    Yeah, 5500 RPM in 4th gear is some serious speed. Were you in Mexico again?
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels, plus a couple more. Mustang dyno'd at 472 RWHP/411 RWTQ.

  17. #15
    PISNUOFF Guest

    Re: LS9 Clutch Carnage

    Randy - Como fue la Florida?

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