Strange LS9 Clutch issue
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 14 of 14
2004-2007 Cadillac CTS-V Performance Mods Discussion, Strange LS9 Clutch issue in Cadillac CTS-V Series Forum - 2004 - 2007; I just had the clutch replaced after only about 40k miles. The clutch was not disengaging. Pedal feel was normal. ...
  1. #1
    ronr's Avatar
    ronr is offline Cadillac Owners Enthusiast
    Automobile(s): CTS-V
    Join Date
    May 2004
    Location
    Fenton, Michigan
    Posts
    857

    Strange LS9 Clutch issue

    I just had the clutch replaced after only about 40k miles. The clutch was not disengaging. Pedal feel was normal. I bled it just to make sure and still no disengagement.

    I was buried at work and didn't have time to do it myself so had it towed to the dealership. They replaced it and I took the old parts over to Katech for Jason and I to look them over. The rebuildable piece from the Katech flywheel looked normal. The friction disk was only .015" thinner than new (probably has another 100k miles in it the way I've been driving.) However, we found a surprise.

    Some sort of insulating material had gotten in to the clutch and packed in to the clearance around the captured disk. It looks like some sort of brown almost hair like fiberglass material.

    Any idea where this could have come from and/or how it got in there? I thought the only way into the bell housing was a vent hole and there is way too much of this stuff to have just come in through a small hole.

    Since the parts have little wear should I be able to clean this thing out and sell it?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    FuzzyLogic is offline Banned
    Join Date
    Mar 2011
    Posts
    2,048

    Re: Strange LS9 Clutch issue

    It must've come from the heatshield surrounding the transmission. That's the only insulating material in the vicinity.

  4. #3
    rand49er's Avatar
    rand49er is online now Cadillac Owners 10000+ Posts
    Automobile(s): 2005 CTS-V, 2011 Cruze 1.4T 6MT
    Join Date
    Jan 2005
    Location
    South Lyon, MI
    Age
    65
    Posts
    13,380

    Re: Strange LS9 Clutch issue

    Why would that have been drawn in there?

    I'm coming up to 10k miles on my Katech LS9 clutch, and it's not exhibiting anything out of the ordinary.

  5. #4
    ronr's Avatar
    ronr is offline Cadillac Owners Enthusiast
    Automobile(s): CTS-V
    Join Date
    May 2004
    Location
    Fenton, Michigan
    Posts
    857
    Thread Starter

    Re: Strange LS9 Clutch issue

    Mystery solved. I spent some time today picking apart the old clutch and what I thought was insulation was actually the fiber glass binder from the captured disk which seems to have come apart. With the other disk only showing .015" wear it sounds like a defective clutch to me

  6. #5
    PISNUOFF Guest

    Re: Strange LS9 Clutch issue

    It sounds like it can't handle the 4000# car to me.

  7. #6
    FuzzyLogic is offline Banned
    Join Date
    Mar 2011
    Posts
    2,048

    Re: Strange LS9 Clutch issue

    Quote Originally Posted by PISNUOFF View Post
    It sounds like it can't handle the 4000# car to me.
    We need a PISNUOFF Certified™ parts list.

  8. #7
    ronr's Avatar
    ronr is offline Cadillac Owners Enthusiast
    Automobile(s): CTS-V
    Join Date
    May 2004
    Location
    Fenton, Michigan
    Posts
    857
    Thread Starter

    Re: Strange LS9 Clutch issue

    I sent some pic's to the guys at Katech and their hypothesis was:

    "That's caused by over-revving the drivetrain. For example, if you go for a 2-3 shift and accidently put it in first, but don't let the clutch out the input shaft and clutch disks are going drivetrain speed. At 10,000 RPM those disks can come apart. The burst speed is much lower when cold also."

  9. #8
    HAMSTAR is offline Cadillac Owners Enthusiast
    Automobile(s): 2006 CTS-V
    Join Date
    Apr 2012
    Location
    Seattle, WA
    Posts
    731

    Re: Strange LS9 Clutch issue

    Quote Originally Posted by FuzzyLogic View Post
    We need a PISNUOFF Certified™ parts list.
    Said list would be very short

    ----------

    Quote Originally Posted by ronr View Post
    I sent some pic's to the guys at Katech and their hypothesis was:

    "That's caused by over-revving the drivetrain. For example, if you go for a 2-3 shift and accidently put it in first, but don't let the clutch out the input shaft and clutch disks are going drivetrain speed. At 10,000 RPM those disks can come apart. The burst speed is much lower when cold also."
    **** that. That is a real ******* explanation.

  10. #9
    PISNUOFF Guest

    Re: Strange LS9 Clutch issue

    My discs looked perfect when the straps broke on both of my LS9's.

  11. #10
    ronr's Avatar
    ronr is offline Cadillac Owners Enthusiast
    Automobile(s): CTS-V
    Join Date
    May 2004
    Location
    Fenton, Michigan
    Posts
    857
    Thread Starter

    Re: Strange LS9 Clutch issue

    Here's a pic showing some of the carnage. Straps were fine.
    Attached Images

  12. #11
    ronr's Avatar
    ronr is offline Cadillac Owners Enthusiast
    Automobile(s): CTS-V
    Join Date
    May 2004
    Location
    Fenton, Michigan
    Posts
    857
    Thread Starter

    Re: Strange LS9 Clutch issue

    Does anyone reman these to replace the captive disk?

  13. #12
    killernoodle is offline Cadillac Owners Fanatic
    Automobile(s): 2005 CTS-V --- the RED one :)
    Join Date
    May 2010
    Age
    29
    Posts
    279

    Re: Strange LS9 Clutch issue

    It seems like you would be able to drill out the rivets and replace them with bolts on the captive disk. I wouldn't be afraid of doing that.

    Use grade 12.9 bolts and loctite.

    Harder part is going to be finding replacement friction disks.

  14. #13
    Den_93's Avatar
    Den_93 is offline Cadillac Owners Fanatic
    Automobile(s): 2011 CTS V
    Join Date
    May 2008
    Location
    Milford, MI
    Posts
    311

    Re: Strange LS9 Clutch issue

    You can buy a new presure plate and disk online for about $450 GM PN# 24260226 AC# 24260226. Theres a dealer in New Hudson if you want to save on shipping.

  15. #14
    ronr's Avatar
    ronr is offline Cadillac Owners Enthusiast
    Automobile(s): CTS-V
    Join Date
    May 2004
    Location
    Fenton, Michigan
    Posts
    857
    Thread Starter

    Re: Strange LS9 Clutch issue

    Thanks, I may give that a try.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting