Weird Clutch Petal Issue
Thread Starter
Pro
Joined: Sep 2005
Posts: 501
Likes: 0
From: Mesa Az
Weird Clutch Petal Issue
Hi Guys,
I am having a weird issue I would like to run past you all.
After installing my LS3 intake manifold and L92 heads I put my C6 on the dyno to see what gains I made.
Afterwords driving home I noticed an issue with my clutch petal when I would do a pull getting on to the freeway. The petal seems to lose pressure and not shoot all the way back to its regular position like normal. It doesn't seem to be "slipping" like rpm's shooting up, but its a weird feeling. Then after a little while it goes back to normal.
I have checked the clutch fluid which looks full and rpm's aren't moving. Clutch is stock and hasn't been beaten on.
(Random description)
During regular driving, (for talking point) the clutch petal is 10 inches from the floor board. After a full 3rd gear pull the clutch petal is stiffer and only around 5 inches from the floor board.
If you then go easy and just drive normal the clutch petal returns to normal and feels fine (thus why I don't feel like the clutch is toast)
Has this ever happened to anyone?
Thanks guys!
I am having a weird issue I would like to run past you all.
After installing my LS3 intake manifold and L92 heads I put my C6 on the dyno to see what gains I made.
Afterwords driving home I noticed an issue with my clutch petal when I would do a pull getting on to the freeway. The petal seems to lose pressure and not shoot all the way back to its regular position like normal. It doesn't seem to be "slipping" like rpm's shooting up, but its a weird feeling. Then after a little while it goes back to normal.
I have checked the clutch fluid which looks full and rpm's aren't moving. Clutch is stock and hasn't been beaten on.
(Random description)
During regular driving, (for talking point) the clutch petal is 10 inches from the floor board. After a full 3rd gear pull the clutch petal is stiffer and only around 5 inches from the floor board.
If you then go easy and just drive normal the clutch petal returns to normal and feels fine (thus why I don't feel like the clutch is toast)
Has this ever happened to anyone?
Thanks guys!
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Most clutch pedal issues are traced to dirty clutch fluid. Have you been doing regular changes per the "Ranger method"?
Check Ranger's site for full clutch fluid info and video:
http://www.rangeracceleration.com/Clutch_Care.html
GM's admission:
http://forums.corvetteforum.com/1561070929-post3.html
More:
http://forums.corvetteforum.com/kens...al-effort.html
Check Ranger's site for full clutch fluid info and video:
http://www.rangeracceleration.com/Clutch_Care.html
GM's admission:
http://forums.corvetteforum.com/1561070929-post3.html
More:
http://forums.corvetteforum.com/kens...al-effort.html
Thread Starter
Pro
Joined: Sep 2005
Posts: 501
Likes: 0
From: Mesa Az
I haven't really put too many miles on the car but after reading on here a bit I am seeing I should change the clutch fluid around every 4kish miles? So just plan on doing that every oil change? I was thinking the fluid might be boiling and thats why it takes a second to come back up.
Thread Starter
Pro
Joined: Sep 2005
Posts: 501
Likes: 0
From: Mesa Az
UPDATE:
I flushed the clutch fluid a few times and still have the problem. I did notice that after I would do a pull (when the petal wouldn't come back up) I could put my foot under the petal and pull it back to somewhat refresh where the petal was...
VERY odd... anyone have this problem? Solution ideas?
I flushed the clutch fluid a few times and still have the problem. I did notice that after I would do a pull (when the petal wouldn't come back up) I could put my foot under the petal and pull it back to somewhat refresh where the petal was...
VERY odd... anyone have this problem? Solution ideas?
Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Sounds like a master cylinder problem.
I'm surprised you haven't gotten more responses. Maybe this new info will get some more folks chiming in. How do you feel about replacing the master? Maybe with one of Tick's new adjustable units?
http://forums.corvetteforum.com/c6-t...r-cyl-kit.html
Please keep this updated.
I'm surprised you haven't gotten more responses. Maybe this new info will get some more folks chiming in. How do you feel about replacing the master? Maybe with one of Tick's new adjustable units?
http://forums.corvetteforum.com/c6-t...r-cyl-kit.html
Please keep this updated.
Retired & lovin' it!
Joined: Mar 2005
Posts: 4,475
Likes: 549
From: Jackson NJ
UPDATE:
I flushed the clutch fluid a few times and still have the problem. I did notice that after I would do a pull (when the petal wouldn't come back up) I could put my foot under the petal and pull it back to somewhat refresh where the petal was...
VERY odd... anyone have this problem? Solution ideas?
I flushed the clutch fluid a few times and still have the problem. I did notice that after I would do a pull (when the petal wouldn't come back up) I could put my foot under the petal and pull it back to somewhat refresh where the petal was...
VERY odd... anyone have this problem? Solution ideas?
Thread Starter
Pro
Joined: Sep 2005
Posts: 501
Likes: 0
From: Mesa Az
The return spring broke or fell out a long time ago and I never had an issue with it before. Do you think that's the issue? I have read so many different reviews on keeping it in, replacing it, or just leaving it out.
(ps, sorry for the spelling error haha)
(ps, sorry for the spelling error haha)
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Team Owner
Joined: Sep 2005
Posts: 20,352
Likes: 568
From: Ventura County, Calif
Thread Starter
Pro
Joined: Sep 2005
Posts: 501
Likes: 0
From: Mesa Az
@ 1_C6, I am trying to troubleshoot without replacing the clutch as I am tight on funds and would rather fix the issue if at all possible without the bankroll of replacing the clutch. (and yes, I would pay someone to do it because its a nightmare haha).
Maybe I will replace the spring and see if that helps, though, I don't understand why it wouldn't be that way all the time not just on higher load pulls...
Maybe I will replace the spring and see if that helps, though, I don't understand why it wouldn't be that way all the time not just on higher load pulls...
Myth Buster
Joined: Apr 2011
Posts: 211
Likes: 2
From: In the lead Tx
@ 1_C6, I am trying to troubleshoot without replacing the clutch as I am tight on funds and would rather fix the issue if at all possible without the bankroll of replacing the clutch. (and yes, I would pay someone to do it because its a nightmare haha).
Maybe I will replace the spring and see if that helps, though, I don't understand why it wouldn't be that way all the time not just on higher load pulls...
Maybe I will replace the spring and see if that helps, though, I don't understand why it wouldn't be that way all the time not just on higher load pulls...
Myth Buster
Joined: Apr 2011
Posts: 211
Likes: 2
From: In the lead Tx
Well it doesnt hurt to do some research in order to understand the entire workings of your system, but you symptoms as youve described have shown up here multiple times. In fact we just got back from The Texas Mile event and the C5 is doing the same thing. We ordered a clutch
keep us posted since its always good to know what others find.Good luck
keep us posted since its always good to know what others find.Good luck
Le Mans Master
Joined: Jun 2009
Posts: 6,724
Likes: 652
Well it doesnt hurt to do some research in order to understand the entire workings of your system, but you symptoms as youve described have shown up here multiple times. In fact we just got back from The Texas Mile event and the C5 is doing the same thing. We ordered a clutch keep us posted since its always good to know what others find.Good luck
keep us posted since its always good to know what others find.Good luck
Unfortunetly, I think you're correct as well.The symptom is not unlike an aggressive drag race launch where the pressure plate heats up and doesn't return the pedal to the full up position, or stays on the floor, until the pressure plate cools down.
My clutch, at 53K miles, is starting to exhibit the same hanging pedal symptom when I go WOT and go for the 4th gear shift. During normal driving and WOT runs upto/into 3rd gear I don't notice it, but when I'm WOT and shifting into 4th the pedal may be 1/2 to the floor when I go to depress the clutch.
IMHO, the heat from the lack of full clutch lockup is causing the pressure plate to heatup/deform causing the pedal to hang.
Last edited by FNBADAZ06; May 31, 2011 at 04:40 PM.
Le Mans Master
Joined: Jun 2009
Posts: 6,724
Likes: 652
My Katech LS9X clutch should be in sometime next week but I'm not sure when I'll have the time to bring the car to the shop. I also need to purchase the Katech Remote Bleeder kit
Myth Buster
Joined: Apr 2011
Posts: 211
Likes: 2
From: In the lead Tx
I cant hardly begin to diagnose or even suggest that your hydraulics are not at fault, but in my case the scenerio stands. Ive actualy done hydro replacement at customers request and then still did clutches. Its terrible but its true. If someone else has solved this issue with just a master replace that could possible give you hope, although it might be a false hope. To suggest the slave is the issue would not hold water either since its quite simple by design. Its just a seal with a plastic sleeve that transfers the movement to the throwout brg. When they fail fluid leaks out on the ground.Just a bit of extra info, if you do install an after market clutch be sure to check the assembled height of the clutch. Ive seen premature brg and clutch failure do to incorrect PP adjustment, and even slave over extension on a set up that is too short.
