I'm posting this here because my question has to do with those that have HD D/ZF crew-cabs, if the mods think it would be better suited or answered somewhere else, no problem!

My 05 has what seems to be the 2-piece driveshaft shudder, does anyone else's have it?
My dealer said "it's the springs in the flywheel, dont worry about it!" -:t

How do you like that!!! He even went so far as to tell me to take it to another dealer. I just turned and walked out....Censored

on a side note, anyone know how long a D/A driveshaft is?

thanks
dan

I am not certain what your problem is. The Dual Mass Flywheel (DMF) does have internal springs and will eventually start rattling and will have to ge replaced. Eventually there will be an aftemarked flywheel and clutch kit which will solve this problem. But in the meantime, your shudder/noise? is likely a DMF problem and should be covered by warranty.

If your crew cab has a two piece drive shaft the carrier bearing that connects them will eventually wear and need replacement. However, I would be real surprized it it had failed at less than 100K miles unless you been sled pulling or a lot of towing.

For sure, go talk to another stealer (assuming under warranty) otherwise go find a non-stealer duramax tech.

good luck.

Deadeye the shudder I'm refering to is best described in the TSB in this post; http://dieselplace.com/forum/showthread.php?t=30007&highlight=shudder my truck has 800 miles on it.
My 03 reg. cab didn't do it even after the flywheel came apart so thats when I went searching...

does your truck have any acceleration vibes between 5-15 mph?

thanks, dan

Hey

I had this problem. It is driveshaft wobble at the carrier bearing from 0-15 mph upon acceleration.

The angle between the two shafts is not srtaight enough unloaded. I notced that when I got 1000 lbs or more in there the shimmy was gone.

So I added a 3/8 inch spacer made of flat stock between the carrier bearing and the frame. The wobble is 75% cured. You may want to add more.

Forget going to the dealership for this. they will never help.

It is easy to do too.

Good luck, I hope this is your problem. I discovered it by riding in the bed of the truck while someone else was driving, and looking down between the bed and cab to see the thing wobble.

Hey

I had this problem. It is driveshaft wobble at the carrier bearing from 0-15 mph upon acceleration.

The angle between the two shafts is not srtaight enough unloaded. I notced that when I got 1000 lbs or more in there the shimmy was gone.

So I added a 3/8 inch spacer made of flat stock between the carrier bearing and the frame. The wobble is 75% cured. You may want to add more.

Forget going to the dealership for this. they will never help.

It is easy to do too.

Good luck, I hope this is your problem. I discovered it by riding in the bed of the truck while someone else was driving, and looking down between the bed and cab to see the thing wobble.


Manny, you hit the nail square on the head buddy!!! I have asked the stealership to have the regional service rep go for a ride however, I haven’t heard from them or GM, not that I figure I will!

I have a post in the driveline sub-category to see how long drive-shafts are and if they are close to what I have I may try to have a single piece made... not that I feel I should after spending $40k on a truck. But, trying not to be single-minded it may be that with a ZF the shaft may be too long for a one-piece shaft..... Hmmmm, where'd I leave my stack of washers?????? Maybe I'll post in the ZF forum to see if others with CC-Z/F's have 1 or 2 piece shafts....

thanks Manny!!

Hey

I had this problem. It is driveshaft wobble at the carrier bearing from 0-15 mph upon acceleration.

The angle between the two shafts is not srtaight enough unloaded. I notced that when I got 1000 lbs or more in there the shimmy was gone.

So I added a 3/8 inch spacer made of flat stock between the carrier bearing and the frame. The wobble is 75% cured. You may want to add more.

Forget going to the dealership for this. they will never help.

It is easy to do too.

Good luck, I hope this is your problem. I discovered it by riding in the bed of the truck while someone else was driving, and looking down between the bed and cab to see the thing wobble.


Manny, you hit the nail square on the head buddy!!! I have asked the stealership to have the regional service rep go for a ride however, I haven’t heard from them or GM, not that I figure I will!

I have a post in the driveline forum to see how long drive-shafts are and if they are close to what I have I may try to have a single piece made... not that I feel I should after spending $40k on a truck. But, trying not to be single-minded it may be that with a ZF the shaft may be too long for a one-piece shaft..... Hmmmm, where'd I leave my stack of washers??????

Maybe I'll post in the ZF forum to see if others with CC-Z/F's have 1 or 2 piece shafts....

thanks Manny!!

I am not certain what your problem is. The Dual Mass Flywheel (DMF) does have internal springs and will eventually start rattling and will have to ge replaced. Eventually there will be an aftemarked flywheel and clutch kit which will solve this problem. But in the meantime, your shudder/noise? is likely a DMF problem and should be covered by warranty.

If your crew cab has a two piece drive shaft the carrier bearing that connects them will eventually wear and need replacement. However, I would be real surprized it it had failed at less than 100K miles unless you been sled pulling or a lot of towing.

For sure, go talk to another stealer (assuming under warranty) otherwise go find a non-stealer duramax tech.

good luck.

My truck just hit 70,000 on it and the rubber was completely gone all the way around it. It's towed some but not a whole lot. Also on the 3/8" spacer plate mine when I changed it had one on the old one and not on the new one so I put it on the new one when I installed it so maybe mine had that problem and it had already been fixed. That is how thick it was so I think mannytranny your as right as ever. I guess I could try taking it out and see if I do then have a shimmy. Have to wait till next week though if you want me to do it cause I am waiting for SBC to fix their stupid clutch before my truck moves again. Its of course already off so it wouldn't be that hard to do if ya want me to it's just that you'll have to wait and see.
Let me know.

Thanks
Nathan

Also my Ext. cab LB has a two piece. Drive shaft that is.

Also my Ext. cab LB has a two piece. Drive shaft that is.

With your XC/LB do you notice any shudder on acceleration?

No I haven't but like I said mine has that plate on it and I don't feel one so I think that mine may have already had the problem fixed. I could try it without the plate when I get my truck back up and going if you want.

I think all ZF's are 2 piece dshafts.

I think all ZF's are 2 piece dshafts.

I think all ZF's are 2 piece dshafts.

mine is one piece steel.

I had an old F250 460cu gasser with handshaker. the carrier bearing was trashed at 120K miles, no towing. I have also seen other posts about the improvement resulting from installing a carrier bearing spacer.

I have 2" blocks in back so I had to drop the CB a full inch. If I remember the U-joints on the ZF drive shaft are a lot larger.

mine is one piece steel.

I had an old F250 460cu gasser with handshaker. the carrier bearing was trashed at 120K miles, no towing. I have also seen other posts about the improvement resulting from installing a carrier bearing spacer.

Deadeye, do you know how long your driveshaft is? I'm trying to get a good idea if I can make mine 1 piece or if because of the length it needs to be 2.....

If your referring to your CCSB it should have a single DS. Probably large alloy not steel.

IIRC, only the long bed trucks have the CBs unless it is a std cab.

Rattlewagon, your kidding, right ? I have not measured the length of the DS and I doubt anyone has unless they broke one. If you really, really need to know I can measure it. But, from what point to what point?

BTW, try calling a $stealer parts guy, until you find a good/knowledgeable one, and ask them about drive shafts. I am sure they can tell you some of what you are interested in.

If I were to guess, a truck with a dual DS and CB will not be able to replace them with a single DS unless it is aftermarket custom made. You might want to do a drive shaft search to see what has been posted previously. . . .

Im suprised Deadeye. I did a good bit of research into this when I was having trouble, and I was totally under the impression that all ZF's were 2 piece.

So I take it you have no wobble at all!

only in my head :lol:

Heres the TSB on the update for replace of the 2 piece shaft/carrier bearing to one piece shaft if it helps http://www.dieselplace.com/forum/showthread.php?t=30007&highlight=launch+shudder

I priced the shaft at about 350 from the stealer, dont know if that includes all the trimmings........

MannyTranny

BTW, your new sig . . . . ??? All politicians sell there souls. It is all about power prestige and $$. It just depends on where they start and who supports them and what they can do to stay or move up the ladder.

You could take your sig and reverse the party name and their "virtues" and the last sentance would still fit. (Of course there are a very,very few exceptions on each side - these are the ones that quit once they find that they cannot make changes/improvements). (Sorry, now that I mentioned this I bet someone else will do this . . . )

JMO, not intending to start an argument. However, I doubt your sig is going to change anyone's perspective. So I just wonder why you put this in your sig and why people put (similar) perspectives on there bumpers?

Most of my friends are conservatives because that is where I was raised and worked. However, I do have some good friends that are liberals. We have occassional jokes but we remain friends because we focus on other characteristics. Occassionally, I run into people that are so constantly focused on politics that (regardless of their side) they are a PIA to spend time with. . . .

OK, I'm done. . . sorry . . .

As an update to my shudder problems, it has been fixed. I contacted GM customer service and complained that my local dealer was unwilling to listen to my concerns and they suggested that I take it to Bortz Chevy in Waynesburg PA. Great guys to deal with!:ro)

They put a vibration analyzer on my truck and it confirmed it came from the driveshaft. They checked with GM Tech and said a shaft from a D/A CCSB would fit along with the slip and pinion yokes.

No more vibration's or bouncing when I shift!!! Smooth as glass!!!! :cool2:


Thank you GM for satisfying a long-time customer! :grd:
dan

Well that's a new one...at least they got it fixed for ya. It is incredible the difference between how the different dealers handle issues isn't it??

Thats odd.

I looked into this a while back. I got a reply from poster ColoradoKid. He has since sold his truck, but he told me that the two were not interchangeable because of larger U joints and such with the 6 speed dshaft.

That must have changed for 05.

I just added a spacer between the carrier bearing and the frame. About 3/8 inch. Straightened the two shafts out, no more wobble.

Did they hack the cross member too?

Thats odd.

I looked into this a while back. I got a reply from poster ColoradoKid. He has since sold his truck, but he told me that the two were not interchangeable because of larger U joints and such with the 6 speed dshaft.

That must have changed for 05.

I just added a spacer between the carrier bearing and the frame. About 3/8 inch. Straightened the two shafts out, no more wobble.

Yes, the shafts components are not interchangable. The slip and pinion yokes have to be changed out as well because the AL shaft has 1-3/16" ujoints and steel has 1-3/8" joints, but the shaft from Allison fit perfectly, I dont think this is anything specific to an 05, earlier models should be the same.

I shimmed my shaft up to 1" making the angles between the shafts less than 1 degree but some vibration was still there. Thats when I decided I spent too much on a defective product and was not going to let it slide. My local dealer in Washington PA didn't want anything to do with me. I called GM customer service and thats how I ended up at Bortz, and they took good care of me!

The new shaft doesn't have any of the vibration or drivetrain bounce or "slop" that the 2 piece steel shaft had before.

They did have to remove the carrier bearing plate that conjoins the hump in the cross member. I asked the Service Manager Dave if he could save the part of the plate they cut so I could keep it if I ever had problems later. I also asked them not to clean the wild edges on the cross member so I cold weld back into place easily if I ever had to.

i took my video camera and stuck it under the pickup, hooked up to my gooseneck trailer with a load on it and started filming the problem is the rear end wrap . the springs are to long and soft. i replaced my factory overload with a custom made one from the local leaf spring shop. i made the leaf extend to the front of the rear spring mount and installed a rubber snubber.(think traction bar) also replaced rubber in carrior bearing with a home made solid rubber one. cured 95% of problem