CDaniel525

Ive had the same issue with my 08 C6 with the clutch sticking to the floor or just slightly above the floor intermittently, but only when drag racing at the track in 1st gear. I always do the Ranger fluid flush before heading to the track OR as soon as I get to the track, so Im pretty sure thats not the issue.

Weird thing is when it sticks to the floor, is that it usually feels like a great launch and throws me back in seat harder than other times when I slip clutch more. So, either its the spring holding the pedal up at bottom slighty OR the clutch is going out. I dont think its the clutch though seeing even when it sticks those launches feel great and its just intermittent and car has only 37k miles, and it did it when I first raced it at 30k miles. And theres only about 14 passes total on the car...

I just spent about an hour reading various threads on removing the spring OR installing the C5 spring...
I dont care about stiffer pedal, just want the clutch to release fully and allow for slip-free operation to get me the best 60' times...
Will removal or C5 spring help bringing the clutch up top or is this just something I need to deal with?

TIA - Chris

Cor430vette

Unsure about your specific question...however I did the C5 spring switch on my 08 cause I hated the feel of the C6 spring and man this feels allot better, smoother shifts etc.....easy and cheap install if I were you I would check it out and reinstall the C6 spring if you dont like it...couple bucks and couple minutes to install...

CDaniel525

I may just do that... Did you ever feel as if when you launched the car very hard, that the pedal would stick to the floor and/or hang way below the top of the pedal momentarily? Did the C5 spring fix that??
Thanks bud...

PRE-Z06

The condition you're describing is the diaphragm springs in the pressure plate getting weak from the heat. IMHO if you pull the assist spring it is just a band-aid and you still run the risk of damaging your synchros in your transmission. If you're going to be drag racing a lot or are looking to maximize your 60', I recommend you look into an aftermarket clutch.

FNBADAZ06

THe problem you are experiencing has nothing to do with the clutch over-center spring...it's the pressure plate diaphragm fingers that are the problem.The heat induced by the drag race launch is not allowing the fingers to return completely to the "engaged" position...therefore leaving the clutch pedal to "hang".

THe only cure is to switch to a clutch/pressure plate assembly that can withstand the heat and stress of a drag race style launch.

:edit....agree exactly with the post made directly above mine

SuperchargedStroker

My C5 had a spec clutch no clutch pedal spring. My C6 clutch pedal spring broke.
I replaced it with the one I took out of the C5. I hate it. It feels like a mushy pedal. I will eventually get around to removing it when I want to wrench my back again.
It does nothing in my opinion, unless someone can offer factual data.
It makes your pedal spongie..

FNBADAZ06

The spring is used to lessen the amount of muscle required to depress and hold the clutch pedal down (it does), and assist the pedal in making sure it returns to a full upright position and re-engages the clutch engagement microswitch (which it doesn't do IF the clutch pedal is already hung).

Mine broke 3 years ago and I've never installed the replacement one......and I'm at 60K+ on my original clutch (C6 Z06).

Neumonic2002

As soon as I had a cam installed earlier this year (around spring time) is when my clutch pedal started to stick to or near the floor, in fact, it happened to me the very first time I got on the car in 3rd gear (again, after the cam install)! I wasn't happy obviously, my car had just under 40K miles on it and had never done this before. I had ran my car in the 1/4 approximately a dozen times prior to the cam and it had never happened at any of the events?

Joe G told me to remove my spring all together so I did, guess what, it has never stuck to or near the floor sense and that was around 6K miles ago!

I say take the spring out!

Toxic c6

Mine did the same thing never had a problem until I put my cam in and it either sticks to the floor or just does not disengage the clutch fully especially shifting into 4th, but im going the Katech ls9x route to completely fix that problem.

Neumonic2002

Did you try removing the spring?

PRE-Z06

Just because you take the spring out doesn't mean it's not doing the same thing, you haven't allowed the clutch to hold more power. Notice the problem always arises when people add more power...

FNBADAZ06

Cor430vette

Yea, I have had that happen a couple of times too...I have not noticed it since the spring change out - but I also have not launched it as hard since I put it in! ..so based on what these guys are saying above sounds like we need a upgraded clutch assembly!!

CMY SIX

Big 0

TMyers

I would agree. I don't drag race but do HPDE's and autocross. Last year after a HPDE on the drive home the clutch went to the floor. I limped it home and let it set over night. The next day I took it out, the clutch came back up but it felt mushy. Upon dissasembly the pressure plate had a blue ring about 1 inch wide all the way around it. Installed the Katech LS7 clutch and could not be happier. Felt like I added 100 hp to the car.

Joe_G

I have taken out half a dozen springs at the track. Works every time to fix this problem. I took my spring out 4 years ago with 17k miles right after I put in a cam....clutch is still going strong today with 59,000 miles and 527 drag strip launches.

I'll tell you the same thing I tell everybody.

Try it. It's free and won't hurt.

CDaniel525

I defenitely gonna try to pull the spring... Hope for the best, expect the worst.

If that's what it comes to, what's the labor on installing a clutch??

Joe_G

Don't fret. You're going to be fine. Be sure and do the Ranger flush before and after the track events.

TMyers

11 hours by the GM book. Here that is $1100.