I hope GM will come up with replacement for the clutch.Its .I beleive most of us who opted for the 6spd tranny wanted it to enjoy certin type of driving and manuevaring that will be lost from current set up.
May be current clutch cant handle all the torque available!!!!

omar

 

I was told by my dealer Corvette Tech today the C6 is having the same problem possibly as the C5. They want to wait and see if it is ongoing in my car. If it is they have to take the Exhaust, Drivline and Clutch out and either replace it or realign the springs. I do not wat the dealer tearing my car apart. I will drive it this weekend to see if it happens again.

 

this may be good news, as you can see i also have the same issue.

hopefully a tsb comes out and it can be fixed in a day. I go through withdraws when i don't have my daily vette fix.

http://forums.corvetteforum.com/showthread.php?t=998907

 

It happened today every time I got in the 5500-6000 rpm range in 3td. The dealer is replacing my clutch on Monday they told me.

Ted

 

If they replace it with the same part number you may have the same problem. The new unit has not been released yet. It might be better to wait until it is released then to tear down your tranny twice.

 

Thanks for the info

 

I beleive this prob is common on all 6 spd C6......I think GM knows about it to and may be was intentionly made that way.

I for one wont accept such interference with my driving habbit wich could result in accident ..some times its only mille seconds that separtae us from escaping or manuevaring out and 4 one dont want my clutch to stick down during it.

I hope GM will come out with an announcment concerning this odd
clutch behavior..either fix it or acknowledge it so we can shop somewhere for a solution to this problem

omar

 

You will have less problems.

 

TT=Arial Black]undefined[/FONT] I think g.m is using a CDV meaning a clutch delay valve like BMW's use. what do you think, I don't know for sure? What does everyone think?

 

Maybe G M has installed a clutch delay valve in our c-6's like the BMW does? What does everyone think?

 

Maybe G M has installed a clutch delay valve in our c-6's like the BMW does? What does everyone think?

 

the last time i checked 6000 to 6500 rpm is well above any posted speed limits so if you clutch did stick to the floor during a accident you where hauling a$$ and blah blah blah blah blah.......... as fo me i bought a vette. i got the z51 suspension with quicker gear ratios for the track. if when i am at the track this was happening i would be upset. it is still cold here but if this is happening it will show up bad at the strip and i have not heard much about this. about 30 more days and weather should break and to the drag strip we shall go.

 

I know another C6 in the area that is had the same problems I am having. He had the Slave unit replaced and the clutch replaced. No problems since. Pops back up fine under hard shifts. Seems some affected units had air in the hydrolic lines that caused teh clutch to stay to the floor at high RPM's. IT is going to the dealer tomorrow to be fixed. I will keep you posted.

 

The C5 was famous for 'clutch sticks to floor' during 'spirited' driving. There was a TSB on it. My C5 did it all the time and I waited a long time to take it in to the dealer because everyone on the forum said the only fix was an aftermarket clutch. When I finally had Chevy look at it they told me there was a TSB and replaced the entire clutch system with Z06 parts. They are not going to recall for this because most owners don't drive hard enough to experience it. I had hoped the problem was fixed on the C6 but I guess not.
BTW the clutch design is a diaphram type and is noted for this behaviour.(sp) Years ago chevy guys replaced these pressure plates with aftermarket 'finger type' plates that could be adjusted to increase pressure with RPM-like Ford.

 

Time for a nice german transmission! ZF for me!

Seriously - put an aftermarket clutch in - problem solved.

 

Was just discussing this in another thread yesterday

C6/C5 issues

1. gas gage
2. column lock

and now clutch

Any C6 rear diff or Tranny leaks yet?

 

Clutch Pedal Does Not Return to Up Position During Shifts at High Engine RPMs (Inspect Date Code and Replace Clutch Kit) #05-07-31-001 - (Apr 8, 2005)
Clutch Pedal Does Not Return to Up Position During Shifts at High Engine RPMs (Inspect Date Code and Replace Clutch Kit)
2005 Cadillac CTS-V

2005 Chevrolet Corvette, SSR

with Tremec T56 6-Speed Manual Transmission (RPOs M10, M12, MM6)

Condition
Some customers may comment that while shifting at engine speeds greater then 6000 RPMs, the clutch pedal does not return to the up position. As the engine speed decreases, the clutch pedal will return to the up position.

Cause
It is possible that when the engine speed is greater than 6000 RPM and the clutch pedal is depressed, centrifugal loads on the clutch diaphragm spring may be greater than the clutch return load from the diaphragm spring. This force created by RPM would be directionally opposite to the clutch bearing force, causing a near net zero or less than zero return force. As a consequence, the clutch pedal may be stuck at the bottom of travel at the floor. Once the engine speed reduces to less than 6000 RPM, spring return load dominates and the clutch pedal returns to normal function.

Correction
Inspect the clutch date code and replace the clutch kit if built PRIOR to the following date code:

• 4M21A/B/C for CTS-V and SSR

• 4M13A/B/C for Corvette





Remove the transmission to inspect the date code on the clutch pressure plate (4). Refer to the applicable procedure below:
- Corvette -- Clutch Assembly Replacement (SI Document ID #1399532)

- CTS-V -- Clutch Assembly Replacement (CTS-V) (Document ID #1453054)

- SSR -- Clutch Assembly Replacement (SI Document ID #1581481)





Important:
The suspect clutches were built PRIOR to the following date codes:



• 4M21A/B/C for CTS-V and SSR

• 4M13A/B/C for Corvette


The date code is located on the pressure plate cover as shown above.
Replace the clutch kit (see part list below) if the date code on the pressure plate is PRIOR to the following date code:
- 4M21A/B/C for CTS-V and SSR

- 4M13A/B/C for Corvette


The date codes are interpreted as follows:


- The first character is the year.

• 4 = 2004

• 5 = 2005

- The second character is the build month.
Important: The letter J is not used in the month code.



• January = A

• February = B

• March = C

• April = D

• May = E

• June = F

• July = G

• August = H

• September = I

• October = K

• November = L

• December =M

- The third character is the day of the month.

- Important: It is possible that the fourth digit, the shift code, may not be present on the date code. The shift code does not pay a critical part in determining a suspect clutch kit.


The fourth, and final, character is the shift code = A/B/C.

Parts Information
Part Number
Description
Qty

12581713
Plate Asm, CLU Press & DRVN (W/CVR)

(CTS-V and SSR)
1

24233084
Plate Asm, CLU Press & DRVN (W/CVR)

(Corvette)
1


Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

K0800
Disc And/Or Clutch Cover, Clutch - Replace

(CTS-V)
2.4 hrs

Disc And/Or Clutch Cover, Clutch - Replace

(Corvette)
4.5 hrs

Disc And/Or Clutch Cover, Clutch - Replace

(SSR)
2.9 hrs

 

When Service Bulletin #05-07-31-001 was mentioned on another forum, it was noted that date code 4M13 translates to December 13, 2004, the build date of the CLUTCH, not the CORVETTE. Before letting your dealer disassemble the car to inspect the date code, then leave it apart for days while ordering parts, remind them that any car built before mid-December could not POSSIBLY have a clutch built after December 13th! So just have them order 24233084 and don't bring in the car until parts are there. Also, for those of you who are not having too much of a problem with your clutch, why not wait until late in your warranty, and get some wear out of your original clutch...

 

cuz it's a real bummer during a race when the clutch won't come off the floor......

 

I was having the same problem with the clutch sticking to the floor. I brought it to the dealer and they bleed the system. The mechanic said there was air pockets. Well it worked, I can know powershift without the clutch sticking to the floor.
I also spoke to Dave from Cartech and he said that it would probably happen again because the hydraulic fluid GM uses is brake fluid and that is has a low boiling point. He recommends changing it to synthetic with has a boiling point of about 600 degrees.
Hopes this works.

*POWERSHIFT-Shifting through gears at W.O.T.