Clutch Pedal Sticking
Thread Starter
Instructor
Joined: Jun 2020
Posts: 134
Likes: 5
From: Texas
Clutch Pedal Sticking
2002 C5 base with 70k miles. I am making 400 hp to the wheels.
Clutch pedal sticks to the floor when doing a hard pull at high rpm. I understand it has to do with the pressure plate or the hydraulic fluid. Currently doing the ranger method to get all that old clutch fluid out of the system.
Should I be looking for a better clutch kit assembly?
Should I replace my master clutch cylinder?
Any advice is appreciated.
Clutch pedal sticks to the floor when doing a hard pull at high rpm. I understand it has to do with the pressure plate or the hydraulic fluid. Currently doing the ranger method to get all that old clutch fluid out of the system.
Should I be looking for a better clutch kit assembly?
Should I replace my master clutch cylinder?
Any advice is appreciated.
Advanced
Joined: Dec 2020
Posts: 52
Likes: 24
From: Tampa, FL
I did the Ranger method; no better. I removed the exhaust and did an actual bleed of the slave cylinder (tough job!); no better. I replaced the master with a Tick adjustable ; noticeably better, but NOT fixed. It’s in for slave and clutch replacement now 😞.
Thread Starter
Instructor
Joined: Jun 2020
Posts: 134
Likes: 5
From: Texas
I have already done the ranger method and my clutch fluid is crystal clear. I removed the clutch assist spring to see if it helps as well.
How much power are you putting down?
Le Mans Master
Joined: Jul 2010
Posts: 6,012
Likes: 726
Noo!! Such a shame the clutch hydraulics has a big flaw in these cars. I'll probably start looking at a clutch as well.
I have already done the ranger method and my clutch fluid is crystal clear. I removed the clutch assist spring to see if it helps as well.
How much power are you putting down?
I have already done the ranger method and my clutch fluid is crystal clear. I removed the clutch assist spring to see if it helps as well.
How much power are you putting down?
.
Last edited by helga203; Sep 8, 2021 at 10:47 AM.
Melting Slicks
Joined: Dec 2004
Posts: 2,847
Likes: 1,144
From: Sleepy Hollow- NJ
Same response in your other thread about the camshaft.
Changing fluid may help you out for a little while. At your RWHP levels it's likely time for a new clutch. If you are currently running an oem Luk clutch it's likely slipping.
Same thing happened to me after going over 420rwhp. Replaced the stock Luk with a c6 Z06 Luk (before I knew any better). That new Luk took a **** after less than 10k miles. First track event it started sticking to the floor again. Replaced with a Centerforce clutch and with 40k miles and now FI it's still holding up with no stickage.
Changing fluid may help you out for a little while. At your RWHP levels it's likely time for a new clutch. If you are currently running an oem Luk clutch it's likely slipping.
Same thing happened to me after going over 420rwhp. Replaced the stock Luk with a c6 Z06 Luk (before I knew any better). That new Luk took a **** after less than 10k miles. First track event it started sticking to the floor again. Replaced with a Centerforce clutch and with 40k miles and now FI it's still holding up with no stickage.
Last edited by Johnny Hardcore; Sep 8, 2021 at 10:59 AM.
Thread Starter
Instructor
Joined: Jun 2020
Posts: 134
Likes: 5
From: Texas
Thread Starter
Instructor
Joined: Jun 2020
Posts: 134
Likes: 5
From: Texas
Same response in your other thread about the camshaft.
Changing fluid may help you out for a little while. At your RWHP levels it's likely time for a new clutch. If you are currently running an oem Luk clutch it's likely slipping.
Same thing happened to me after going over 420rwhp. Replaced the stock Luk with a c6 Z06 Luk (before I knew any better). That new Luk took a **** after less than 10k miles. First track event it started sticking to the floor again. Replaced with a Centerforce clutch and with 40k miles and now FI it's still holding up with no stickage.
Changing fluid may help you out for a little while. At your RWHP levels it's likely time for a new clutch. If you are currently running an oem Luk clutch it's likely slipping.
Same thing happened to me after going over 420rwhp. Replaced the stock Luk with a c6 Z06 Luk (before I knew any better). That new Luk took a **** after less than 10k miles. First track event it started sticking to the floor again. Replaced with a Centerforce clutch and with 40k miles and now FI it's still holding up with no stickage.
Le Mans Master
Joined: Jul 2010
Posts: 6,012
Likes: 726
Last edited by helga203; Sep 8, 2021 at 11:34 AM.
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Thread Starter
Instructor
Joined: Jun 2020
Posts: 134
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From: Texas
Do you have the link to the exact centerforce clutch you used?
Le Mans Master
Joined: Jul 2010
Posts: 6,012
Likes: 726
Melting Slicks
Joined: Dec 2004
Posts: 2,847
Likes: 1,144
From: Sleepy Hollow- NJ
No I did not. It was plug and play without balancing. I went with the 11 inch dual friction (only because I didn't realize the "12 inch is better". I've had 13 years and 40k+ miles and 100 track passes with that 11 inch and it's been excellent. It's still holding up with 634rwhp and 568rwtq. I went with a Fidanza Aluminum flywheel.
You can get the C5 12inch Centerforce as a kit with the their flywheel. I believe Corvettemods.com is where I got it. They still sell them.
I did remove the extra weight ring because it chattered and drove me nuts. Spoke with a Centerforce engineer whom instructed me and confirmed it was okay to remove. The weights are their to keep stock clutch feel..
There are many other performance clutch options. In my case I tried the Centerforce on a whim after my brothers using them in their Mustangs for years with great results.
I too can say I've experienced great results with their Dual Fruction clutch in a high power C5.
You can get the C5 12inch Centerforce as a kit with the their flywheel. I believe Corvettemods.com is where I got it. They still sell them.
I did remove the extra weight ring because it chattered and drove me nuts. Spoke with a Centerforce engineer whom instructed me and confirmed it was okay to remove. The weights are their to keep stock clutch feel..
There are many other performance clutch options. In my case I tried the Centerforce on a whim after my brothers using them in their Mustangs for years with great results.
I too can say I've experienced great results with their Dual Fruction clutch in a high power C5.
Last edited by Johnny Hardcore; Sep 8, 2021 at 08:39 PM.
Thread Starter
Instructor
Joined: Jun 2020
Posts: 134
Likes: 5
From: Texas
No I did not. It was plug and play without balancing. I went with the 11 inch dual friction (only because I didn't realize the "12 inch is better". I've had 13 years and 40k+ miles and 100 track passes with that 11 inch and it's been excellent. It's still holding up with 634rwhp and 568rwtq. I went with a Fidanza Aluminum flywheel.
You can get the C5 12inch Centerforce as a kit with the their flywheel. I believe Corvettemods.com is where I got it. They still sell them.
I did remove the extra weight ring because it chattered and drove me nuts. Spoke with a Centerforce engineer whom instructed me and confirmed it was okay to remove. The weights are their to keep stock clutch feel..
There are many other performance clutch options. In my case I tried the Centerforce on a whim after my brothers using them in their Mustangs for years with great results.
I too can say I've experienced great results with their Dual Fruction clutch in a high power C5.
You can get the C5 12inch Centerforce as a kit with the their flywheel. I believe Corvettemods.com is where I got it. They still sell them.
I did remove the extra weight ring because it chattered and drove me nuts. Spoke with a Centerforce engineer whom instructed me and confirmed it was okay to remove. The weights are their to keep stock clutch feel..
There are many other performance clutch options. In my case I tried the Centerforce on a whim after my brothers using them in their Mustangs for years with great results.
I too can say I've experienced great results with their Dual Fruction clutch in a high power C5.
Racer
Joined: Aug 2004
Posts: 438
Likes: 15
From: satellite beach fl
https://ls1tech.com/forums/manual-tr...-write-up.html
Long read, skip down to 'What is drill mod?' and then 'Next step is to replace your clutch master cylinder'.
Drill mod works in most applications
Long read, skip down to 'What is drill mod?' and then 'Next step is to replace your clutch master cylinder'.
Drill mod works in most applications
Last edited by purrvert; Sep 8, 2021 at 08:07 PM.
Thread Starter
Instructor
Joined: Jun 2020
Posts: 134
Likes: 5
From: Texas
https://ls1tech.com/forums/manual-tr...-write-up.html
Long read, skip down to 'What is drill mod?' and then 'Next step is to replace your clutch master cylinder'.
Drill mod works in most applications
Long read, skip down to 'What is drill mod?' and then 'Next step is to replace your clutch master cylinder'.
Drill mod works in most applications
Melting Slicks
Joined: Dec 2004
Posts: 2,847
Likes: 1,144
From: Sleepy Hollow- NJ
Seems many do not have issues with vibration post install when moving to an aftermarket clutch and flywheel...but some do. It depends on the balancing of the new assembly as well as the engine balancing of the specific vehicle. In my case I installed two separate brand new assemblies in my own garage without balancing and had zero issues with vibration.
I'm typically not that lucky, so chalking it up to the new assemblies being balanced enough when changing both the flywheel and clutch at the same time.
Le Mans Master
Joined: Jun 2016
Posts: 5,426
Likes: 3,972
From: Cincinnati, OH
Most likely clutch.
I know plenty with Quarter master clutches, stock MC and stock slave cylinders with no pedal issues...
I have Tick MC (stock bore size) as a cheaper attempt to fix my problem, stock slave cylinder and 10.5" SPEC Stage 2 with 10.5" aluminum FW with no pedal issues. I had plenty of issues with stock ls6 clutch...until it eventually broke a PP finger or two...at 70k mi.
I know plenty with Quarter master clutches, stock MC and stock slave cylinders with no pedal issues...
I have Tick MC (stock bore size) as a cheaper attempt to fix my problem, stock slave cylinder and 10.5" SPEC Stage 2 with 10.5" aluminum FW with no pedal issues. I had plenty of issues with stock ls6 clutch...until it eventually broke a PP finger or two...at 70k mi.