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Old 05-29-2013, 01:00 AM   #1
Rabamaro
 
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Crunchy Clutch

On the way home from the G17 Fbody Gathering in ATL this weekend, I made a couple 6th-3rd downshifts at 65 mph. After the 3rd time, I noticed a grinding sensation when I depressed the clutch nearly to the floor. I can still row through the gears just fine, but I can't help but notice this suttle grinding that I can feel through my foot when I depress the clutch when I'm coasting to a stop sign or red light or even sitting at idle. There are no unusual noises that I can hear either. When the car is off, it feels totally smooth.

Worth mentioning might be the fact that my dealer noticed that something "fell out from under my car" when I had them replacing an axle that I broke while at the track 4-5 weeks ago. It looked like a little sliver of soft metal not much bigger than a twist tie. They told me that they thought it was a clutch sliver, but it felt fine and had no issues until yesterday.

Mods are in my sig. Any insight would be appreciated!
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Old 05-29-2013, 06:52 PM   #2
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No one?
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Old 06-26-2013, 05:46 PM   #3
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Update:

Took it to lethal last weekend. My slave and throwout bearing were completely destroyed! I'm going to go ahead and get them to install a ZR1 clutch, MGW shifter and port my intake manifold.
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Old 06-26-2013, 06:06 PM   #4
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Do a search on ZR1 clutch reviews. There are a bunch of unhappy people out there.
Just my $.02
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Old 06-26-2013, 06:51 PM   #5
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Originally Posted by blufin View Post
Do a search on ZR1 clutch reviews. There are a bunch of unhappy people out there.
Just my $.02
I picked it up used from a guy on here for $600 with only a couple thousand miles on it and no passes at the strip. His slave failed, so he bought a new clutch thinking that was the root of the problem. When he found out it was the slave, he just kept the new one and sold the used one. I just sank a ton of money into a house and didnt have the extra coin for a street slayer.
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Old 06-26-2013, 09:00 PM   #6
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Quote:
Originally Posted by Rabamaro View Post
I picked it up used from a guy on here for $600 with only a couple thousand miles on it and no passes at the strip. His slave failed, so he bought a new clutch thinking that was the root of the problem. When he found out it was the slave, he just kept the new one and sold the used one. I just sank a ton of money into a house and didnt have the extra coin for a street slayer.
Please do some research,you don't wont to be the next one with a bad slave and the repair bill...It is ALOT cheaper to do it right the first time,you will save the most money if you get a Street Slayer .If I can help you out let me know,please do your homework it will save you a lot of time and money.
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Old 06-26-2013, 09:47 PM   #7
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I had the ZR1 clutch and loved it... Also had lingenfelter billet steel flywheel and new slave cylinder... Also install ideal garage master cylinder... Clutch felt just like stock... No complaints here... My SS made 628rwhp 553 rwtq...
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Old 06-27-2013, 08:48 AM   #8
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Originally Posted by kevin1106 View Post
I had the ZR1 clutch and loved it... Also had lingenfelter billet steel flywheel and new slave cylinder... Also install ideal garage master cylinder... Clutch felt just like stock... No complaints here... My SS made 628rwhp 553 rwtq...
Exactly what I got minus the idealG. The guy I bought clutch from also included the LPE return spring.

And I realize going with the street slayer may save me in the long run, but it was all about going with what I had available here and now. I'm at 500 whp now and take it to the strip 3-5 times a year. If I can get a year and a half to 2 yrs out of it, I'll be happy.
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Old 06-27-2013, 10:16 AM   #9
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Originally Posted by Rabamaro View Post
Exactly what I got minus the idealG. The guy I bought clutch from also included the LPE return spring.

And I realize going with the street slayer may save me in the long run, but it was all about going with what I had available here and now. I'm at 500 whp now and take it to the strip 3-5 times a year. If I can get a year and a half to 2 yrs out of it, I'll be happy.
I would run away from any clutch that needed a return spring,i think that says a lot.I understand your reasoning and hope I can help you when the time comes.,
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Old 06-27-2013, 11:57 AM   #10
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Quote:
Originally Posted by Rabamaro View Post
I picked it up used from a guy on here for $600 with only a couple thousand miles on it and no passes at the strip. His slave failed, so he bought a new clutch thinking that was the root of the problem. When he found out it was the slave, he just kept the new one and sold the used one. I just sank a ton of money into a house and didnt have the extra coin for a street slayer.
I believe the fault lies with the upgraded zr1 clutch. I don't think many reported issues with the ls9x clutch but quite a few with the ls9r clutch. I went through 3 slave cylinders with my ls9r clutch. $200+ per slave and 300+ each time you drop the tranny all because of a clutch that cost 1600 bucks. I basically paid for the SS triple by going that route. But now I have the Street Slayer triple and have no regrets and I've been on the same slave cylinder for 10,000 miles, my clutch pedal is easy because I don't have an "upgraded" return spring on it, and it doesn't grind gears shifting fast.
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Old 06-27-2013, 12:01 PM   #11
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but to your original post is sounds like floater damage or loose or missing spring. On previous cars that is the only thing that has given me that sensation. But only way to know is to take it down.
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Old 06-27-2013, 12:48 PM   #12
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Originally Posted by CyberPredator View Post
I believe the fault lies with the upgraded zr1 clutch. I don't think many reported issues with the ls9x clutch but quite a few with the ls9r clutch. I went through 3 slave cylinders with my ls9r clutch. $200+ per slave and 300+ each time you drop the tranny all because of a clutch that cost 1600 bucks. I basically paid for the SS triple by going that route. But now I have the Street Slayer triple and have no regrets and I've been on the same slave cylinder for 10,000 miles, my clutch pedal is easy because I don't have an "upgraded" return spring on it, and it doesn't grind gears shifting fast.
What's the difference btwn the LS9x vs LS9r?
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Old 06-27-2013, 12:50 PM   #13
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Originally Posted by CyberPredator View Post
but to your original post is sounds like floater damage or loose or missing spring. On previous cars that is the only thing that has given me that sensation. But only way to know is to take it down.
Shawn at Lethal sent me the pic of my slave. It had completely come apart.
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Old 06-27-2013, 01:01 PM   #14
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Mine did the same thing about 3 weeks ago, only mine gave me no warning. 1st to 2nd fine, 2nd to 3rd clutch pedal went to the floor and stayed. Slave and throw out bearing destroyed. My street slayer shipped yesterday. :-) I can't wait to drive my car again!

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Old 06-27-2013, 03:33 PM   #15
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Originally Posted by Rabamaro View Post
What's the difference btwn the LS9x vs LS9r?
ls9r is the upgraded pressure plate version. supposed to be good for 900lb of torque or something around there. The X is the stock untouched ls9 clutch. In our cars probably good for around 700lbft
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Old 06-27-2013, 03:36 PM   #16
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Originally Posted by Rabamaro View Post
Shawn at Lethal sent me the pic of my slave. It had completely come apart.
Sorry to say it but if you keep that clutch in your car it will probably keep doing the same thing. The vettes don't have that issue so I think it has something to do with that spacer we have to use to put it in our cars.( Maybe not big enough or to big not really sure just hypothesizing)
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Old 06-27-2013, 03:48 PM   #17
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Sorry to say it but if you keep that clutch in your car it will probably keep doing the same thing. The vettes don't have that issue so I think it has something to do with that spacer we have to use to put it in our cars.( Maybe not big enough or to big not really sure just hypothesizing)
I'm fairly certain that the one I have is the LS9x clutch. I have two friends who have the same setup and love theirs.
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Old 06-27-2013, 04:04 PM   #18
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Just confirmed that its the LS9x rated around 700ftlbs. That's the one without the issues correct?
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Old 06-27-2013, 05:15 PM   #19
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Just confirmed that its the LS9x rated around 700ftlbs. That's the one without the issues correct?
From my understanding they are the same clutch,one is heat treated which is suppose to make it stronger? It has the same stack height. I can tell you we replace a lot of those systems for numerous issues,one customers disc flew apart when it broke and we had to rebuild it for him so he could get some of his money back,,,,,
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Old 06-28-2013, 12:43 PM   #20
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Just confirmed that its the LS9x rated around 700ftlbs. That's the one without the issues correct?
The X is the one I've seen with less issues. But it's not any kind of confirmed science, it's just what I've noticed over the years. But you already have had the big issue with them so I don't think you will be one of the the lucky ones.
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Old 06-28-2013, 02:22 PM   #21
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The X is the one I've seen with less issues. But it's not any kind of confirmed science, it's just what I've noticed over the years. But you already have had the big issue with them so I don't think you will be one of the the lucky ones.
Well that's disconcerning.
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Old 06-29-2013, 02:00 AM   #22
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I replaced my slave and throwout bearing last October (2012) and at the same time had the Mcleod RXT installed. I also have a separate clutch reservoir. I'm getting a slight gravelly feeling on and off in the clutch pedal. The clutch still engages about an inch off the floor and shifts fine. Some times the clutch chatters and due to my cam I have to slip it to get the car moving. I'm guessing the slave is going out again?

I don't race drag race the car and it's not a daily driver, however I did autocross the car twice at the Good Guys show last March. After my first run at the autocross my clutch was so hot I couldn't get the car in reverse. After letting it cool it drove fine.

Any suggestions?
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Old 06-29-2013, 09:11 AM   #23
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Originally Posted by gnturboray View Post
I replaced my slave and throwout bearing last October (2012) and at the same time had the Mcleod RXT installed. I also have a separate clutch reservoir. I'm getting a slight gravelly feeling on and off in the clutch pedal. The clutch still engages about an inch off the floor and shifts fine. Some times the clutch chatters and due to my cam I have to slip it to get the car moving. I'm guessing the slave is going out again?

I don't race drag race the car and it's not a daily driver, however I did autocross the car twice at the Good Guys show last March. After my first run at the autocross my clutch was so hot I couldn't get the car in reverse. After letting it cool it drove fine.

Any suggestions?
That slight gravelly feeling is how mine started out. Eventually I could hear a steady metal on metal grind or shearing while sitting at idle with my foot off the pedal.
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