Lmmgr

Waldorf Chevy charged $407.26 to flush and bleed. Not covered under warranty. Owners manual indicates changing at 30,000 miles or 2 years.

rmorin1249

Have you been doing a lot of drag racing?

Lmmgr

No. I'm an old man of 61. Don't use anywhere near the 455 HP. Except, I did use Launch Control 1 time. I held on and didn't suffer a heart attack.

Indy-hp

This was a common issue with C6s, and I changed the fluid at every oil change until I had several oil changes. You can search for the instructions. Use a turkey blaster to suck the black stuff out of the reservoir and replace it with new. Pump the clutch a few times and do it again a few times until it stays clear.

I read recently that the black fluid is not burnt or even bad, but just discolored from the seals in the system that bleed black until you have tens of thousands of miles on the car. My C6 did eventually stop having black clutch fluid.

Joy c7

Our 2013 427 Vert with only, 2,000 miles the clutch fluid looked like black tar, Never beat it. the only time I tried to pull a hole shot the clutch pedal stuck to the floor and I could smell clutch dust two months later. One reason we got an automatic this time

ben dover

Too damn much money for that job.

Joy c7

And yes sold 427 for C7 no regrets.

Gary '09 C6

it appears that GM is still using the same seal material for the slave cylinder that was used for the C6 M6s...
why won't GM fix this by upgrading the material used ? the cost differential can't be that significant...

rmorin1249

HaHa, I'm almost 66 and getting my first Corvette.

Joy c7

I read somewhere that the C7 slave cylinder is the same one that they used in the C6's

Steve2150

If they are using the same clutch slave cylinder in the C7 as in the C6, then GM lied when they issued this statement when they introduced the C7. This is from the GM Authority page.

You already know that the 2014 Chevrolet Corvette C7 Stingray is an all-new model… you may also know that the designers and engineers only used two parts from the previous-generation C6 on the C7. We didn’t know what those were… until now.
Specifically, they are the cabin filter and roof latch. How’s that for all-new?

Read more: http://gmauthority.com/blog/2013/03/here-are-the-two-carry-over-parts-from-the-c6-to-the-c7-corvette/#ixzz3ehOqCh7M

JerryU

Did my own after 1 year using a simple procedure I used with my C6; 1) remove fluid from small clutch reservoir with a $2 syringe, 2) fill up the small clutch reservoir with DOT 4 brake fluid, 3) pump clutch 30 times and 4) repeat procedure 4 to 6 times. The clutch fluid circulates as the clutch is pumped. This is a pic of the removed clutch fluid after the 1st and 6th time. Easy to do, took about 1/2 hour and cost $4 for one container of DOT 4 brake fluid (specified in manual) and a ~$2 for a syringe. Plan to do each year, which should be the at least as good as the GM procedure, IMO. Here is a PDF of what I did: http://netwelding.com/Clutch_Fluid.pdf
I paid $125 to have the dealer flush and bleed the brakes in my C6 after 2 years. May just replace what is in the brake fluid reservoir, which is not as good but better than nothing.




Clutch Fluid After 1st and 6th Change

WelderGuy

The concentric slave cylinder was dreamed up by bean counters to reduce weight and save a little money.



These things live in a hellish environment of high temperatures and microscopic clutch dust. The dust gets into the fluid, and eventually causes the seal to fail and bind up. This leaves you with the clutch pedal stuck to the floor at the worst possible time. Similar problems have been experienced with CSCs on some Fords and on Nissan 350Zs and 370Zs.

NTMD8R

The method of changing the fluid you are referring to is the "Ranger" method.
(He elaborated and discussed and documented the method for us).

And just to let you know how bad it can be....
On my 2007 MN6 with less than 10,000 miles on it, and still under warranty....
Autocrossing one day and the clutch pedal stays on the floor.
Have it towed to Chevy dealer.
They replaced the slave cylinder AND the flywheel.
$2800
They said the flywheel was burnt.
I said this should be under warranty.
They said NO.... GM says NO.
So I contacted GM.... yup... the clutch is a "consumable".
What a crock of BS.
So, yes, I paid the $2800 (what choice did I have ?)

If I had known I was going to have to pay, I would have taken it to my
own mechanic, and had them install after-market parts.... so no further hassle.

Just a warning... it COULD happen to you.

Splitter

Lol

AFVETTE

Guess the new members were unaware of this and the easy and cheap solution aka Rangers Clutch Fluid service. I used his method on my 99, 03 Z06, 06 and 07 Z06. Always before,miring and after track events. Never had a clutch problem.

CriticalmassGT

That's all it is. The color of the fluid does not necessarily indicate that the fluid is bad.

vetehead

Here goes yet 1 more part I'm hearing carried over.. what happenned to just 2...

JoesC5

On a recent road trip to Utah, one in our group was driving their 98 C5 pace car with the M6. It had 28,500 miles and had never had the clutch fluid changed(not in the owners manual to do so).

We left Torrey, UT one morning and didn't make it a mile down the highway, when his clutch stuck to the floor. Stuck on the side of the road in the middle of nowhere.

I drove back to Torrey to see if the Phillips 66 station had any brake fluid. Luckily they had one bottle of DOT3(which is specified in the 1998 owners manual). Using a paper towel, we emptied the reservoir and there was definitely a build up of solid black material at the bottom of the reservoir. Cleaned it out with a paper towel. Poured in some fresh brake fluid and was able to pull the clutch pedal up and then pumped the pedal 15 times. The fluid was still black, so repeated it three additional times, until the fluid was clear after pumping the clutch pedal 15 times.

He drove the remained of the trip(~1500 miles and a lot of clutch pedal action in the mountains in Colorado, etc) without further incident. When he got home, he flushed the system(Ranger's method) with DOT4.

The black solid particles in the clutch fluid was just that, solid particles, not a discoloration from the seals.

I do the "Ranger" flush on my 2009 Z06 twice a year(43,000 miles now) and have never, not once, had the clutch pedal stick to the floor. When I change my fluid(using DOT4) I see some solid particles in the reservoir, but not anywhere as bad as the pace car on our trip.

Before I head out on our next road trip to Gettysburg, Maryland, Virginia, etc, in October, I'll again flush my clutch system(Whopping $4 and 15 minutes of my time in my driveway).

AORoads

The new C7 may have only two old parts from C6, but that doesn't mean the new parts are of a different design. It may be a different size only. Or shape. Or capacity. Or output. To fit a C7. But same design.