My truck is going in to get the squeaky pedal and hard clutch documented before warranty goes out. My dealer was real nice and said as long as it's documented when GM finds a fix it will be covered.


Does GM have anything official I can point them to to get these problems documented? I've heard a lot of good info but nothing absolute they can look into. Thanx.

You just need to take it in and tell them the problems and tell them to fix it. They then put it into their computer and if necessary, contact the regional tech center for directions on how to fix. I am in the same situation. a thread on this forum talks about soon to come out fix for the squeaky clutch and hard pedal. do a search and you will find it. . .

I do not doubt they have a "fix" and know what problem is. They are probaly just trying to find cheapest way or for it to go out of warranty like the piston slap problem in some GM 5.3's and 6.0's for undersized pistons (or over bored cylinders)from day one.

Jeli:


Found this on another site. It is just a piece of the entire post. Maybe this guy is on to something. Look at the bolded text..


ColoradoKid,

NV241 manual shift transfercases were used behind all NV3500 transmissions. My ZF is not screwed up. Every one I have played with is the same….a bit noisier than the New Venture transmission. I did have a hard clutch pedal after driving on the highway for a while and found the release bearing/slave cylinder assembly was dragging on the input shaft sleeve. Cleaned up the sleeve with emery cloth and replaced release bearing assembly and corrected the jumpy grabby clutch engagement issue.

Actually, the more miles my ZF gets on it the better is flows through the gates. Still not as smooth as a NV5600 but not too bad.

My clutch pedal squeaks and creeks on warm days too! LOL…of course, all 3 of us Silverado manual trans owners would only know that.


Maybe this will help..


L8r

Jeli,


I believe my hard clutch pedal has been fixed. At least I haven't had it happen again.I took my truck in and they said "GM says" the truck was filled with dot 3 fluid instead of dot 4 so they will replace the Clutch master cylinder and the clutch slave cylinder. After they did this it hasn't shown any sign of trouble so far. The dealer didn't have a clue what I was talking about but after checking with GM (?) they found the answer. Good luck and thanks for the tip on my shifter.


Steve

Jeli,


I believe my hard clutch pedal has been fixed. At least I haven't had it happen again.I took my truck in and they said "GM says" the truck was filled with dot 3 fluid instead of dot 4 so they will replace the Clutch master cylinder and the clutch slave cylinder. After they did this it hasn't shown any sign of trouble so far. The dealer didn't have a clue what I was talking about but after checking with GM (?) they found the answer. Good luck and thanks for the tip on my shifter.


Steve

You cannot help but wonder why they cannot get this right. I have 91 camary that went 215,000 miles to present with a hydraulic clutch and I have not had 2 cents of trouble with it and it is all original. I may have topped it off once at most and it still works fine. Even has original clutch.

I did have a hard clutch pedal after driving on the highway for a while and found the release bearing/slave cylinder assembly was dragging on the input shaft sleeve. Cleaned up the sleeve with emery cloth and replaced release bearing assembly and corrected the jumpy grabby clutch engagement issue.





I have a hard time buying this. Even a slight rub at 2000 rpm is going to cause a lot of heat. Mine is too predictable as the ambient temps rise. But hey I've seen stranger things happen.

Jeli,


I believe my hard clutch pedal has been fixed. At least I haven't had it happen again.I took my truck in and they said "GM says" the truck was filled with dot 3 fluid instead of dot 4 so they will replace the Clutch master cylinder and the clutch slave cylinder. After they did this it hasn't shown any sign of trouble so far. The dealer didn't have a clue what I was talking about but after checking with GM (?) they found the answer. Good luck and thanks for the tip on my shifter.


Steve





BS !! http://www.dieselplace.com/forum/smileys/Angry.gif the "stealer" did the exact same thing to my truck 8 months ago. It still has all the same problems. the squeak is a result of the poor pedal design. the hard pedal is a result of clutch slippage due to a poor flexplate design. BTW, you swapped your "DOTS" backwards.

Deadeye, I'm not calling you on this but in my case I can't see my problem being clutch slippage. I have no chatter odd noises etc. I simply get on the highway and cruise 70 mph empty or loaded the clutch acts the same. Hard after a long drive, faster these past days in the 90's here. The clutch engage doesn't change.


I will agree heat is the key factor whether it's outside temps or clutch slippage. I definatley know what a clutch slipping feels like. Whatever the weak link is it must be on the hairy edge from the start.


7/22/04 yesterday it was 95 here. My pedal stiffened up quickly going home. The first 10 miles I was shifting but the last 8 miles was a straight shot and the clutch was as hard as after a 100 mile run. I ran to the store at 10pm. The clutch still felt a little stiff. Since it was still in the 80's I'm convinced my problem is heat releated. Not clutch slip but heat. Too bad they couldn't make a kit to duct air from the front to one of the vent holes on top of the trans bell housing.Edited by: Jeli

I dont have and never had a squeaky pedal and I know that nothing was slipping. It always was during a gental cruise of at least a half hour or more with no shifting. Then that first shift was very stiff. Sure sounds like heat building up pressure. Cant believe it was any kind of slippage.


Steve

I am wondering if to fluid and seal combo is binding in the slave cylinder bore at higher temps causing a stiff clutch.

The clutch is slipping. that is what creates the heat. it heats up the slave cylinder. the DOT 4 (or 3 if it hasn't been switched out) expands and puts pressure against the clutch. after a few seconds it cools some. the stealer installed a tranny cooler. the pedal still gets hard when accelerate hard but cools off faster. I stand on the pedal then pull it up with my toe. it then gets back to normal.


the HTJA turned up makes it worse. at stock it is hardly noticeable. the slippage is easily seen as the levels go up and is harder to detect a lower levels. at high levels and quick accel the pedal will go hard in 2 seconds while I watch the RPMs surge and the speedo barely move.


I have discussed this with a couple guys who work on trannys and are currently in process of designing (and now testing?) replacement flexplates and clutchs.


If you want to learn more search this forum for flywheels, flexplate, clutch and/or hard pedal and you will find some extensive threads . . .

BTW;


at the dyno day last Sat. my clutch worked fine with HJAT at lvl 3 all the way up to 103mph : 335 rwhp and ~650 ftlb torque. the second run at lvl 5 the clutch smoked BIG TIME and the clutch went immediately hard. This was the hardest the pedal ever got. the tech shut down the run . . .it is the clutch.

The stealer just called and they have ordered a replacement clutch pedal kit for my truck. If I can I will take a pic of the kit before they install it . . .

My dealer cant find the p/n on the clutch pedal kit....I had to give them the p/n on the new flywheel so i am not surprised about the pedal kit.... do you have the number so I can give it to them?

There are two different conditions that seem to cause the hard pedal -- prolonged highway driving and clutch slipping.


If you manage to slip the clutch it will get hard right away.


The prolonged highway condition is thought (by GM) to be caused by the clutch's self-adjust mechanism. I suppose that could be the case with a slipping clutch as well, but so could heat.


Last I heard, GM was not working on a fix, but they did in fact know about it. I don't think that they believe it causes any real problem, so I am not sure that they think it needs fixing. If it isn't heat related it may not be a problem.


My only fear is that it is in fact heat related (and could be a symptom of a real problem). Temperature readings in both the trans and the hydraulic fluid (why does it turn black -- is it *boiling*?) would certainly be enlightening.


I have not had the problem with CPMac's clutch kit so I haven't pursued it any further.

Joe V.


Glad to here Craig's kit is working well. I spoke with him yesterday, twice and expect to order a kit on Monday once he gets the parts from the machine shop http://www.dieselplace.com/forum/smileys/Clap.gif


My discussion with him indicated that the installation was pretty easy . . . .boy am I lookin forward to gettin this done http://www.dieselplace.com/forum/smileys/Big Smile.gif

I doubt my clutc was slipping all 2300 miles from florida to cause the hard pedal and narrow engagment.

I spoke with CPMac this am and he expects to ship me a dual disc kit this week. We discussed the hard pedal issue. He has looked into it some and is still not sure what causes it but likely not a heat inside the bell housing. This is because the sled pullin he has done quite a bit of just piles a lot of heat in there but does not cause a hard pedal. He agrees that something is causing a push pack on the pedal and MAY be due to some heat against he cylinder on the firewall but he has not examined this. He did have one customer with a single disk clutch and single mass flywheel that had a hard pedal pulling a trailer in Texas heat for 350 miles. To this point none of his customers with the dual disc clutch kit have had hard pedals.


Hopefully, when he gets some time he will check this forum and post what he knows for future customers . . . .http://www.dieselplace.com/forum/smileys/Big Smile.gif

took mine in for hard clutch and the dealer has never herd of this before and they don't know what they are going to do, and did not know of the squeaky pedal fix so I gave them the part # and they stood there and just looked at Me. http://www.dieselplace.com/forum/smileys/smiley5.gif we will see what happens today!

update new slave and new master cyc. is going in to fix hard pedal,and new pedal assembly to fix the squeak, thanks to this forum.