? about clutch slipping
Thread Starter
Intermediate
Joined: Apr 2005
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From: duryea pa
? about clutch slipping
Hi, i just got a 2000 c5. The car drives good under normal driving conditions. When the tracktion controll is off from a dead stop, car takes off pretty good however when i hit second gear it feels like the clutch is slipping. what it is doing the RPMs revs up but it feels like the car isnt moveing to good and then i smell an odor. It does not always do it, sometimes i get rubber in second gear. it only does it when i shift from 1st to second. Sometimes when i hit it down on the highway i smell the same odor.
Is my clutch starting to go? or is it another problem like the tracktion controll not working properly?
Is my clutch starting to go? or is it another problem like the tracktion controll not working properly?
Drifting
Joined: Jun 2004
Posts: 1,887
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From: Havin' fun in Frederick, MD!!!
St. Jude Donor '05 '09
It does sound like the clutch. Try it in higher gears. The clutch slips more in higher gears than it does in lower gears because there is less mechanical advantage and more of a load.
Good luck
Good luck
Thread Starter
Intermediate
Joined: Apr 2005
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From: duryea pa
Originally Posted by lemansbleu2004
It does sound like the clutch. Try it in higher gears. The clutch slips more in higher gears than it does in lower gears because there is less mechanical advantage and more of a load.
Good luck
Good luck
under raceing conditions it only does it from 1st to 2nd. but it does not do it all the time. when i am crusing down the highway, i drop in 3rd, hit the gas down, it does not slip but i smell something burning.
Race Director
Joined: Dec 2003
Posts: 12,599
Likes: 1
From: Texas
I had the burning smell when I first started driving my C5 and it wasn't my first manual tranny. Now does the slipping occur right away or after a few runs? I have "glazed" the clutch before and thought something was terribly wrong but apparently it just needs to cool down. My understanding is that glazing heats up the clutch and kills the friction (much like overheated brakes) thus causing slipping. Now if its happening right away this might be cause for alarm. Good luck!
Thread Starter
Intermediate
Joined: Apr 2005
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From: duryea pa
after a few runs. the car runs 12.99 in a 1/4 mi. than it runs 13.7, 13.8 when it slips. do you think i can rule out every other possibility and blam the clutch.
should i replace the clutch, pressure plate, and fly wheel? or is there another fix? it is going to coast me about 1500.00 to get the job done.
what do you mean by "glazing"?
thank you very much for the help, i need some more advice.
should i replace the clutch, pressure plate, and fly wheel? or is there another fix? it is going to coast me about 1500.00 to get the job done.
what do you mean by "glazing"?
thank you very much for the help, i need some more advice.
Race Director
Joined: Dec 2003
Posts: 12,599
Likes: 1
From: Texas
I had what my understanding of glazing was after a few back to back runs. I ran the RPMs high and too slowly let out the clutch, first never fully caught (felt like I never fully released it) and I redlined, shifed to second and same thing just bad slipping. I let it sit, worried that something broke, but fired her up later and drove her home just fine.
Race Director
Joined: Aug 2000
Posts: 10,649
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From: Central Florida
You can overheat the clutch by slipping it too much
(1) on a hard launch and/or
(2) on a poorly synchonized strong shift
When either occurs, the rotating surfaces slip against one another at high speed (rpm) causing extreme heat. This actually can make the rotating disc friction surfaces slippery. They will stay slippery until the rotating bodies return to normal temperatures.
It is also true that a clutch will start to slip as it reaches the end of its service life and the friction surfaces lose their effectiveness and the pressure plate loses its full clamping force.
The first place to look is at your driving/launch/shift techniques.
If those are not producing heat, then try this:
Accelerate slowing in 4th gear to about 3500 rpm. Hammer the throttle. If you detect no slippage of the clutch....take another look at your clutch/throttle habits during launch and shifts.
Ranger
(1) on a hard launch and/or
(2) on a poorly synchonized strong shift
When either occurs, the rotating surfaces slip against one another at high speed (rpm) causing extreme heat. This actually can make the rotating disc friction surfaces slippery. They will stay slippery until the rotating bodies return to normal temperatures.
It is also true that a clutch will start to slip as it reaches the end of its service life and the friction surfaces lose their effectiveness and the pressure plate loses its full clamping force.
The first place to look is at your driving/launch/shift techniques.
If those are not producing heat, then try this:
Accelerate slowing in 4th gear to about 3500 rpm. Hammer the throttle. If you detect no slippage of the clutch....take another look at your clutch/throttle habits during launch and shifts.
Ranger
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Thread Starter
Intermediate
Joined: Apr 2005
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From: duryea pa
just got back from my test, heres what happend.
when i am in 4th gear building up my RPMs to 3500, than pushing the throttle all the way down, no slipping. i did this 3 times going up hill.
i tried it at 3000 RPMs going up hill it did not slip but it smelled. my wife said it smells like "rotten eags".
is there nothing wrong with the clutch but the driver?
should i have it replaced or just wait a while?
i read in another post that maybe i should have the fluid changed? the car has 36500 miles on it.
thank you very much for your help
when i am in 4th gear building up my RPMs to 3500, than pushing the throttle all the way down, no slipping. i did this 3 times going up hill.
i tried it at 3000 RPMs going up hill it did not slip but it smelled. my wife said it smells like "rotten eags".
is there nothing wrong with the clutch but the driver?
should i have it replaced or just wait a while?
i read in another post that maybe i should have the fluid changed? the car has 36500 miles on it.
thank you very much for your help
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Originally Posted by yazu
just got back from my test...it did not slip but it smelled. my wife said it smells like "rotten eggs"
With the car fresh from an overnight rest, drive conservatively to warm the car. Then repeat the test. Then pull over to a safe place. Pop the hood. Sniff the driver's side firewall by near the rear-most spark plug. If that smell is very strong in that location, that is clutch.
If that test produces "eau de clutch" then your clutch is nearing the end of its service life.
How many hard launches are on the car in those 36K+ miles?
Ranger
Thread Starter
Intermediate
Joined: Apr 2005
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From: duryea pa
i am dumb founded
Ranger,
took the car out today for another test as you said. in 4th gear rev slowly up to 3500 RPMs hitting the thoddle down, no slpipping. pulled over on the side of the road to smell under the hood buy the drivers side firewall and did not smell anything out of the orderary.
i tried it back in drag race mood. tracking controll off regular pull out(not hard) the tranfer from 1st to second was not bad but a little slipping. tried it with tracking controll on and i got second gear rubber.
then i tryed it wit tracktion controll on again only this time i launch it hard. all it did was rev up (like the clutch was slipping bad) and i got lots of smoke.
let it cool down for a few minutes. i went on a dead road put tracktion control off and see if i can do a burn out. all the car did was spin the tieres. no clutch slipping.
i guess what i am tring to figure out if the traction controll is working properly?
how does the traction controll work?
or is my clutch at the end of its service life?
please help thanks
took the car out today for another test as you said. in 4th gear rev slowly up to 3500 RPMs hitting the thoddle down, no slpipping. pulled over on the side of the road to smell under the hood buy the drivers side firewall and did not smell anything out of the orderary.
i tried it back in drag race mood. tracking controll off regular pull out(not hard) the tranfer from 1st to second was not bad but a little slipping. tried it with tracking controll on and i got second gear rubber.
then i tryed it wit tracktion controll on again only this time i launch it hard. all it did was rev up (like the clutch was slipping bad) and i got lots of smoke.
let it cool down for a few minutes. i went on a dead road put tracktion control off and see if i can do a burn out. all the car did was spin the tieres. no clutch slipping.
i guess what i am tring to figure out if the traction controll is working properly?
how does the traction controll work?
or is my clutch at the end of its service life?
please help thanks
Thread Starter
Intermediate
Joined: Apr 2005
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From: duryea pa
Thanks Ranger.
i did not get your pm it might be down. my email address is
wdrozjr@adelphia.net i am looking forward on talking ot you
thanks
bill
i did not get your pm it might be down. my email address is
wdrozjr@adelphia.net i am looking forward on talking ot you
thanks
bill
Thread Starter
Intermediate
Joined: Apr 2005
Posts: 27
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From: duryea pa
Tsab, any help i get i greatly appreciated
Ranger, thank you for taking the time to talk to me. the car does not have active handling. the fluid is black like you presumed it to be.
i am now doing a search on competition mode or drag race mode.
thanks for the help
Ranger, thank you for taking the time to talk to me. the car does not have active handling. the fluid is black like you presumed it to be.
i am now doing a search on competition mode or drag race mode.
thanks for the help
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 31
From: Central Florida
Originally Posted by yazu
...Ranger, thank you for taking the time to talk to me. The car does not have active handling.
I am now doing a search on competition mode or drag race mode.
The fluid is black like you presumed it to be.
I am now doing a search on competition mode or drag race mode.
The fluid is black like you presumed it to be.
Glad to meet you and work on you car by phone.
Starting with the black clutch fluid...The Syringe for changing clutch fluid in the master cylinder ...I'd suggest changing the fluid every few days until it remains clear and then again every time it start to look cloudy. I've followed this regime on my 02 and not had the pedal act up.
If your car doesn't have JL4 Active Handling, it won't have "competitive driving."
Ranger
Last edited by Ranger; May 19, 2005 at 09:13 PM.
