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Replaced Driveshaft

Shaners

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Shaners Senior Enthusiast

Shaners

Posted
Posted

I was having a slight problem with a vibration or shudder when I would take off from a standing start.  A few times it was rather severe, and it was more noticable when I was carrying a load or towing.  I presented the TSB to my friends at Bissett Chevy where I bought the truck, and they ordered me a new 1-piece drive shaft to replace the 2-piece drive shaft and carrier bearing in my truck...

 

They had to cut the carrier bearing out of the crossmember and I think they did a fine job, and to top it off they took less than 2 hours for the total job.  

 

Here is a shot of where the carrier bearing used to be...

 

12018862-e93c-020001F8-.jpg

Shaners Senior Enthusiast

Shaners

Posted
  • Author
Posted
Cool, at least they didn't cut a big chunk out of the cross memeber itself, like I seen happen to another guy.  :thumbs:

I saw those pics too....  I think he got a new truck for that didn't he???

 

BTW, so far this seems to be an excellent solution to my problem, and it must be the reason the '02's have the one piece shaft in them...

MountaineerTom Senior Enthusiast

MountaineerTom

Posted
Posted
Cool, at least they didn't cut a big chunk out of the cross memeber itself, like I seen happen to another guy.  :thumbs:

I saw those pics too....  I think he got a new truck for that didn't he???

Yeah.  I think it took him a few months to get it all worked out, but got a little nicer truck at no extra cost to him.  :D

Shaners Senior Enthusiast

Shaners

Posted
  • Author
Posted
Wow! I had no idea the 2500's had Two Piece drive shafts!

The 01's had them.  I don't know which models had them, but obviously the crewcabs did.  The '02 crews have this bigass Aluminum shaft  ;)

Hutch Enthusiast

Hutch

Posted
Posted

Shaners,

 

Could you explain the "shudder" some more?  I have a noise coming from underneath my '02 Crew Cab short bed with the 2-piece drive shaft.  It sounds like someone knocking on the underside when accelerating across a rough surface.  I can even feel it through the floor board.  If I let off the throttle it goes away which tells me it has something to do with torque caused by acceleration.  I also hear it if I hit a big bump even if I'm not accelerating.  I do NOT hear it if I'm on a real smooth surface.  I have ruled out slapping leaf springs or loose shocks and I've looked over the underside and checked all the nuts and bolts and can get to to make sure they are tight.  Could it be play in the carrier bearing housing?  Any other ideas?

 

Thanks!

 

Hutch

Big Bert Enthusiast

Big Bert

Posted
Posted

I have a 2000 2500 silverado ext cab that came from factory with a one piece drive shaft :ooh: I wonder why some came with a two piece :O

Fastchevys Enthusiast

Fastchevys

Posted
Posted
The '02 crews have this bigass Aluminum shaft  ;)

My '02 4x4 HD crew cab came with the 2 piece. :)

 

Need to get a 1 piece, as my truck does have the takeoff shudder.

Shaners Senior Enthusiast

Shaners

Posted
  • Author
Posted

Hutch,  It was a seat of the pants feeling.  You culd feel a vibration under your butt when you took off at moderate acceleration.  It was a "shudder" type vibration and wasn't always noticable...  A couple of times it was violent enough that I could get some "slap" out of the rear springs.

 

The carrier bearing is mounted in a rubber shell, and as torque is applied to the drivetrain the driveshaft will begin to oscillate in this rubber mounted bearing.  It is worse on harder acceleration, and when towing/hauling...

 

Now that I have a new driveshaft it surprises me at how smooth the truck will "launch".

 

I hope this helps...

Shaners Senior Enthusiast

Shaners

Posted
  • Author
Posted

This is what I got from the National Highway Transportation Association.  (NHTSA.com)

 

Make:  CHEVROLET TRUCK  Model:  K2500  Year:  2001

 

Service Bulletin Number:  010417001B  Bulletin Sequence Number:  629 Date of Bulletin:  03/02

 

NHTSA Item Number:  629551  

Component:  POWER TRAIN:TRANSMISSION:AUTOMATIC  

Summary:

SUBJECT REGARDING LAUNCH SHUDDER ON ACCELERATION (INSTALL NEW ONE-PIECE PROPELLER SHAFT) *JG

GreenRado Enthusiast

GreenRado

Posted
Posted

Hutch, don't know of this helps, but I noticed w/ relative's 2-piece, that the "shudder" was at the very first application of the throttle for a second or 2, and it got worse both in duration and intensity, at least in the case I'm mentioning, when the truck was pulling or hauling a load, ie - 5th wheel.  This was to the point that the IP shook violently!  The 1-piece cured it completely.

 

There is a separate issue with spring slapping when hitting irregularities, but this can occur independently from accelerating or not, but sounds like you've ruled that out.

 

The seat of the pants shake/vibration description by Shaners is exactly right.

Mike G. Enthusiast

Mike G.

Posted
Posted

I have a two piece drive shaft on my 2002 GMC 2500HD, extended cab, short bed, two wheel drive. I had a similar problem, but it was a "klunk" noise when I would first excellerate. It went to the dealer three times. They did a number of things like lubricating the splines, adjusting the srings, etc, etc, etc. It is much better now, but not perfect. When I tow my fifth wheel, I don't have the problem. Just a comment.

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