Stopped by the dealership today and the diesel mechanic and I called the tech center inquiring about the new flywheel. They said there is a new part number that was just published as of August 5th. It is also in a bulletin but nobody knew about it because non of the dealerships have the info yet. But It is out. They have to order it not a big supply yet so go and get it ordered. They have to spak it first befor ordering. Just thought I would share the joyfull news to all 6 ers on the sight with flywheel problems.

Hopefully the ticket on this ongoing problem I will find out if it is single mass or dual mass next week when they get the spak case number on it.

That is great news. http://www.dieselplace.com/forum/smileys/Big Smile.gif My second DMF is growling pretty bad. I was hoping to make it last long enough until the new and improved product came out!


Now lets see how long before it gets into the supply chain. http://dieselplace.com/forum/smileys/Confused.gif


Keep us all informed on the specs and when it will be available!!!


Thanks,


MaxRock

This is what I heard. I called South Bend Clutches to see if they had the solid flywheel ready and this is what he said. They stoped work on it because Luk was coming out with one. And Luk the producer of the dualmass flywheels that are in all of our trucks. So if he knows what he talking about I hope that this new flywheel is the solid. But then again I don't know for a fact if this is true.

This is what I heard. I called South Bend Clutches to see if they had the solid flywheel ready and this is what he said. They stoped work on it because Luk was coming out with one. And Luk the producer of the dualmass flywheels that are in all of our trucks. So if he knows what he talking about I hope that this new flywheel is the solid. But then again I don't know for a fact if this is true.


Peter said this?

New part number is 24232434

can someone see if it is a single mass?

Thats what Peter told me.

Doesn't a single mass require a different style clutch disc.

Doesn't a single mass require a different style clutch disc.


As far as the OEM's are concerned it does (either a sprung hub clutch disc or a DMF). This reduces vibrations.


Aftermarket performance applications combine one or more solid clutch discs with a solid flywheel. It rattles, it produces gear lash noise, but it is strong...

Cpmac's setup uses a sprung hub design. A sprung hub is a little louder than a DMF, but much stronger.

Cpmac's setup uses a sprung hub design. A sprung hub is a little louder than a DMF, but much stronger.


A good sprung hub disc *can* be quite strong. I haven't heard from CPMac how strong but 500+ hp could be possible.


For 600+ hp and certainly for pulling dual disc solid/solid is the way to go.

Does anyone make a heavy duty pressure plate and/or clutch disc for use with the stock DMF? McLeod, Hayes, etc?

My second flywheel is showing early signs of failure at 55K. Given that I've recently been able to cause a stiffer clutch pedal when I crank up the Juice and get on it in 6th gear, I'm thinking my clutch is getting weaker, too. I'd like to have the dealer change the clutch while they're replacing my flywheel, but I'd like something that can hold more torque than the factory clutch.

Someone must make something?

I don't mind a little heavier pedal if it'll hold more torque.

Im pretty sure CPMac will sell just the parts or the kit without the flywheel.

His clutch fits the stock flywheel?

Great! How do I reach him?

Several companies make replacement disc. Some are ceramic some kevlar. I think LUK may have something and possibly southbend or mcleod. Just remember the weak part of this setup is the flywheel. Even if the clutch will hold 500 hp, the flywheel is going to seperate and cause problems. I would recomend CPMac's setup. We installed 2 dual disc and a single disc yesterday and they work great. http://www.dieselplace.com/forum/smileys/Clap.gif

I am pretty excited about this! I'm going in for my FOURTH flywheel replacement in 55,000 miles.

And to think that I bought the 6-speed to AVOID transmission problems...

Gary
Sheehan Motor Racing
www.teamSMR.com

Has any one had one of these flywheels come apart? Or do they just rattle till we can't stand it any more?


I had my truck in the service dept. today so after reviewing this forum and reading the tech. bulletins, I went ahead and had them order me a new flywheel I hope that this "diagnosis by computer" is going to work out.


Jim

His clutch fits the stock flywheel?

Great! How do I reach him?





His clutch will not fit stock flywheel. PM me if you need his number.

I found his number, but couldn't reach him and couldn't get a return call.

Anyway, I've found a couple of sources for heavy duty clutches that fit the stock flywheel. My current flywheel is starting to go, so I'll get the latest version installed under warranty and have them slap in one of the heavy duty clutches at the same time.

WOW!!!!!! I had my dealer order the new flywheel yesterday the 30th and I was notified that it was shipped this morning from Maryland. Supposedly 2nd day air. I am really impressed. Maybe working at a Chevy dealership has it's advantages after all.


Jim

I found his number, but couldn't reach him and couldn't get a return call.

Anyway, I've found a couple of sources for heavy duty clutches that fit the stock flywheel. My current flywheel is starting to go, so I'll get the latest version installed under warranty and have them slap in one of the heavy duty clutches at the same time.


Craig is hard to reach at the number on his web site. Good luck with the new flywheel. I wouldn't jump more than about 100 hp with it though. Just my .02 cents.

New Flywheel came in today! Just have to get the truck in and I will let you know how it works.

I had my new flywheel installed and so far so good....it only took a couple of days to get the new part. The old p/n sounded good the first couple of thousand miles so we will see how long this one lasts. It is the 6th one this truck has had in 80,000 miles. The 3rd one never left the parking lot. Like was mentioned before I bought a 6 Speed thinking there would be no problems... was I ever wrong.

mwhitfil


I also bought the manual for that reason to.


But it isn't the trany it is the garbage GM put between the engine and trany.


I hope to never have flywheel problems for at least 200,000 miles with the new one.

Well, I brought my truck in on Friday, with 11 days left in the 12 month warranty, and 800 miles left in the 12,000 mile warranty from the last time they replaced the flywheel.

Got a call Friday afternoon that the new part number flywheel was ordered and my truck will be ready to go on Wednesday.

Man, I hope this flywheel lasts for over 100,000 miles. The current flywheel expires before the warranty is up. The LAST thing I want is the new one to fail AFTER the warranty is up.

Gary
Sheehan Motor Racing
www.teamSMR.com

Well my new flywheel came in and the box was all beat to hell. They opened the box before tearing into the truck and discovered the new flywheel was tore up worse than the box it came in, so they had to reorder another one...... Just my luck. Now GM is reviewing were to get one as they are all on national backorder.


Jim

Just called the dealer. My truck was supposed to be ready yesterday. Took a call from me to have my service guy find out that the flywheel is on backorder and he doesn't have a status for me.

Proactivity in action...

Gary
Sheehan Motor Racing
www.teamSMR.com

Yep, I pick my truck up tomorrow with no new flywheel. As jim-in-so-ore stated, national backorder. No estimated delivery date.

http://www.dieselplace.com/forum/smileys/Angry.gif

Lovely!!! http://www.dieselplace.com/forum/smileys/Cry.gif

I'm waiting for one, too. Just started making noise last weekend. Was ordered Tues., and the dealer said "should be in by Fri." We shall see, I'll let you know when I hear it's in.

I find it interesting that the new DMF is on national backorder and only 44 members have voted about their clutch/flywheel problems on this forum.


Since I have the third DMF on my lifted truck my stealer says I have to remove the lift back to stock to get the warranty replaced DMF. According to the tech rep it is the 35" tires causing the problem. I wonder how they would respond if my lawyer called them with the new about the national backorder http://www.dieselplace.com/forum/smileys/HiHi.gif.


I have decided to go with a CPMac kit. GM's entire clutch kit is a POS.

I'll second that Deadeye. GM is not going to beat a one piece flywheel with any DMF. I know Craig will stand behind his product. It's worth a little growl at idle not to have it when you hit the go pedal. Now if only if CP's flywheels come inhttp://www.dieselplace.com/forum/smileys/Confused.gif.

Lucky for me, my clutch is behaving for the most part, other than the occasional hard pedal. As soon as I get some indication that there is a problem, I will probably add the kit from Craig. I am concerned however, that he is virtually impossible to reach. I would like to see some pictures of the products, both single and dual setups. Also, is there a hotline to call if there is a problem during installation? Not to offend Craig, but for the kind of money being charged, I would like to know more about the product and person before I spend my hard earned dollars. A tech hotline number would also help calm my fears.


Some clarification would really help me feel better.

The dealer called me today and said the flywheel is in. Truck goes in on Mon. for installation. Will keep you posted.

My truck is also going in Monday the 13th for the new flywheel and the new pedal assembly kit.

Here are some pictures of the new flywheel. Hope they uploaded alright,
I don't know how to do it.

precision37,


Would like to see the pictures, but I don't see anything. Can you try again???


MaxRock

It doesn't seem to work for me, I think maybe they are too big or I'm too simple. I could email them to someone else to post.

Today, the 13th the replacement (for the damaged one) flywheel came in. I opened the box and this one is not damaged so tomorrow I get it installed in my truck. Boy the original one gets noisier each time that I drive my truck. I'll be so glad to get the new one installed.


Jim

Well, I got my truck back. The new flywheel seems to have heavier springs in it from what I saw looking at the new versus the old. There is now a slight shudder when letting out the clutch with no throttle. About like what you'd expect from a heavy truck.
These flywheels are heavy suckers, and I'm gladthat with all of the pieces
they've got a redline of 3500 RPM. Hate to see one come apart.

I took mine in on Tuesday and they listened to it and said they'd order the parts. Drove all the way from the beach up to Thorson GMC in Pasadena. My buddy is a salesman up there and said they were cool and had a steady medium duty business so my manual tranny duramax was old hat. Took the six gun off but left the AFE and Banks exhaust on after my buddy talked to them. Probably could have left the six gun on, they didn't seem to mind. The service writer saw my pre oem filter and brought the other guys to look at it. Told me he wished everyone ran one.

Damn, I need a dealer like that.

I went to my dealer today and demonstrated the noise. But they were skeptical that it was the flywheel, even though they had the service bulletin in their hands that described my complaint to a "T". And they were skeptical that it really was covered by the 5yr/100K warranty, even with my finger pointed at the line in the warranty book that lists "flywheel" as a covered item.

They proposed replacement of the pressure plate, disk, throwout bearing, pilot bearing, and to machine the existing flywheel. To the tune of $2500.

I got so frustrated trying to get it through this numbskull's head that none of that was going to do any good and what I really needed was just the new flywheel as described in the service bulletin and it was covered under warranty, that I gave up arguing and left.

But, it all worked out. I called the service manager later and explained the situation. He called GM and got the straight scoop and called me back. He's ordering the new flywheel for me. He's also getting me the latest clutch pedal assembly for the hot weather creaky pedal problem, something the truck has always done and has been in the shop numerous times for. My new South Bend heavy duty clutch is here and ready to install. So hopefully the GM parts will be here in a week or two and I'll finally sort out this truck's clutch & flywheel issues.

Damn it can be frustrating working with service departments sometimes. This is a small dealership and my guess is I bought the only 6-speed Duramax they've ever sold.

Well I brought my truck into the service dept here where I work on Tuesday and they dispatched it to a tech who told me he had only pulled out one manual trans in his young life and it was in an S-10.


I started to get a little nervous at this point and thought "Well, hell he's got to learn". 1 1/2 hour later he finally had the shifter out, and I'm thinking "Oh Boy, this is going to be interesting". He finally got the trans out about 2 hours later and then for some unknown reason he puts a pilot shaft on the clutch disc to pull it out. IT GETS STUCK. He can't take it back out. He finally puts a puller on the pilot shaft and when the pilot shaft finally lets go, it flies out of the pilot bearing and hits the cement floor, and you guessed it. it mushrooms the edge of the disc. So now that is junk, and we don't have another one. Luckily another dealer 30 miles away had one. They sent a runner after it. He gets it all back together except for the shifter Tuesday. Wednsday he puts the shifter back in and then it sits & sits. I asked him what the holdup is now and he says "Did you know that your trans takes a special gear oil"? I asked him where did it go and he replied that he had drained it so it wouldn't spill out.. I thought that was what the seals were for. I finally drove my truck yesterday afternoon and the clutch pedal feels weird. real soft and releases close to the floor. Maybe I was experiancing the " hard clutch pedal" and didn't even know it. Oh, and the service advisor told me that the tech had broken some "little clips" that we did't have either and they had to order them. I am not the happiest camper in the woods at the moment. When Our Service manager gets back from National Guard summer camp I will have him drive it to see what he thinks.





Well after that rant I FEEL BETTER!!!!!!


Jim

Sounds as if they didn't bleed the clutch system. Its a hydraulic system, and when you take it appart it has to be bled after reassembly just like brakes.

Well got my truck back yesterday after having the new flywheel and the new pedal kit put in and man it is better than I remember. You forget how nice everything works when the only thing you can hear is rumble and vibration from the underneath of your truck for a year. It is running great so far. Hell it lasted longer than my last flywheel already.
Knock on Wood.

I got the call on Wednesday and my truck went in today to get the new flywheel installed. Should get it back Monday. Looking forward to not changing the flywheel every 11 months!

Gary
Sheehan Motor Racing
www.teamSMR.com

I had mine installed on Thursday.http://www.dieselplace.com/forum/smileys/Cry.gif If they can't get the same vibration out that it had when I drove it off the lot new then GM is going to have to do something. Because I'm getting tired of this. The trucks got 22,000 miles and the dealer said that this would be the last one. The transmition has started making a noise about 14,000 miles when you wiggle the gear shifter. It sounds like you've got 4 or 5 rings in your hand and bouncing them. The 2 key remotes qiuet working for the second time. I am just about getting ready to push for the lemon law.

Well my flywheel has about 150 miles on it and it is starting to make a light tapping/rattle sound again when clutch is being engaged and disengaged. Does anyone else have this sound on the new flywheel yet? I don't know what the F*** GM thinks this fixes. Mabey there is more than just a flywheel problem on my truck.

If GM can't do a better job makin' a clutch they should just stop offering them. It seems to me they are trying to phase them out by keeping them detuned while they run the power up on the Allison. They need to realize that some people prefer a stick and they shouldn't be penalized 85# ft because of it.

Well, got the truck back yesterday. Truck feels brand new again with a nice smooth clutch action with no noise or vibration.

The tech said the old one was twisted up so bad that he had a tough time removing it. That doesn't sound like a "coating" problem to me.

Anyway, I'm hoping this one lasts more than 11,000 miles. My fingers are crossed.

Oh, by the way, the tech asked me if I'd ever considered chipping my truck. He said if I do, make sure I remove it before bringing it in for service to ensure warranty coverage. He also suggested the Edge and has several friends using it that he's helped out. Nice advice from a good guy.

Gary

Well they went back in and bled my clutch system and it's all better now. I swear that it even quieter when it is idleing. It's like having a brand new truck.


Jim

any body know what the new bulliten says for the flywheel/clutch problem.
Also what could cause a new DMF to start lightly rattling with only 200 miles on it just like the last DMF thay put in. Truck runs smooth couldn't be injectors. Maybe the pilot bearing or input shaft. This is really bugging me I can't bring the truck back to dealer every 200 miles to have a new wheel put in.

Picked up my truck with the new 24232434 flywheel installed today. Also had the South Bend kevlar clutch installed.

It's true, you don't realize how bad it was until it's fixed. The truck is noticeably smoother and quieter. I can accelerate without listening the the 4x4 shifter buzz and rattle, what a concept.

I got to look at the service bulletin, and it describes the failure mode of the old flywheel. Something about a thrust washer wearing. Didn't seem like somthing that would be related to power level.

The clutch started out kind of weird, engaging very close to the floor. But after 20 miles or so it's about back to normal. Now to put the Juice back on and see if it'll hold level 5 in top gear.

Also got the new 15120866 clutch pedal, but the weather's cooled down, no way to tell if the creaking is fixed.

Best of all, it was all covered under warranty, with no deductible, even though the truck is just over 3 years old and has 56K miles. They said because I had these issues while it was still under the 3yr/36K, there was no charge.

I love my Duramax ZF6 again!

My truck is going in on Tuesday to get the new DMF. This will be the 3rd DMF in 94k miles. I hope this is the last one for at least 100k miles.


I'll report back after I get the truck out of the shop.


MaxRock