LS1csherm

there is not but
there is a TSB for a replacement driveshaft for the exact problems you described.
I will look for the tsb

LS1csherm

Launch Shudder/Vibration on Acceleration (Replace Propeller Shaft and InstallNew Pinion Flange/Seal) #02-04-17-001A - (07/19/2002)
Launch Shudder/Vibration on Acceleration (Replace Propeller Shaft and Install New Pinion Flange/Seal)
1999-2003 Chevrolet Silverado 2WD 1500 Series Extended Cab Short Box Pickups

1999-2003 GMC Sierra 2WD 1500 Series Extended Cab Short Box Pickups

With 4L60-E Automatic Transmission (RPO M30)

Except QUADRASTEER™ (RPO NYS) Equipped Vehicles

This bulletin is being revised to add Model information. Please discard Corporate Bulletin Number 02-04-17-001 (Section 04 -- Driveline Axle).


Important
Implementation of this Service Bulletin by "GM of Canada" dealers requires prior District Service Manager approval.


Condition
Some customers may comment on a vibration when accelerating from a stop. This is also known as launch shudder. This condition may occur between 0-40 km/h (0-25 mph) and be more noticeable when the vehicle is carrying cargo or used for towing.

Correction
A new propeller shaft, P/N 15071486, has been developed to correct this condition. The new propeller shaft incorporates dual double cardan joints on the center and rear joint positions. Refer to Corporate Bulletin Number 02-00-90-002 for lubrication information.

The new propeller shaft will require the installation of a new pinion flange kit, P/N 15071485. The pinion flange kit consists of the following components:

A pinion flange
Hex bolts (four)
A pinion seal
A rear axle drive pinion nut
Replace the propeller shaft with the new propeller shaft using the following procedure. Use the part numbers listed below.

Remove the propeller shaft assembly and the center bearing. Refer to the applicable Propeller Shaft Replacement procedure in the Propeller Shaft sub-section of the Service Information (SI).

Important
In step 2, you must measure the pinion and differential preload. This information is needed to set the preload of the new pinion flange to the correct specification and to reduce any rear axle noise concerns.


Remove the drive pinion yoke and the pinion oil seal. Refer to the Drive Pinion Flange/Yoke and/or Oil Seal Replacement procedure in the Rear Drive Axle sub-section of the Service Information (SI).

Important
In step 3, use this procedure as a guideline to install the pinion flange to the drive pinion and to set up the proper pinion bearing preload.


Install the new pinion oil seal, the new pinion flange and the new drive pinion nut. Refer to the Drive Pinion Flange/Yoke and/or Oil Seal Replacement procedure in the Rear Drive Axle sub-section of the Service Information (SI).
Install the new propeller shaft assembly and the new center bearing. Refer to the applicable Propeller Shaft Replacement procedure in the Propeller Shaft sub-section of the Service Information (SI). Tighten
Tighten the propeller shaft flange bolts to 70 N·m (52 lb ft).
Tighten the center bearing support nuts to 40 N·m (30 lb ft).
After completing the repair, operate the vehicle in order to verify that the condition has been corrected.
Parts Information
Part Number
Description
Qty

15071486
Shaft Asm-Frt & Rr Prop
1

15071485
Flange Asm Service Kit-Rr Prop Shf
1

*12479002
Flange Asm, Pinion
1

*9441504
Bolt, Rr Prop Shf
4

*26064028
Seal, Pinion
1

*9783762
Nut, Rr Drv Axle Pinion
1


*Parts are included in Flange Kit P/N 15071485.

Parts are currently available from GMSPO.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

F2043
Flange, Pinion Shaft - Replace
1.5 hrs

Add
To replace two-piece prop shaft
0.2 hr

Scott@DrivelineSolutions

iTrader: (22)

Thanks, I'll print that and take it into my dealership and see what they say.
The double cardan shaft has a h-yoke like an old style cv joint right? It was used alot in the front of older solid axle front axles.

Scott@DrivelineSolutions

iTrader: (22)

Hey I had to tow a 7500 lb truck on my car hauler and it did not shutter at all. It was loaded down pretty good and I am wondering if my slip and stub might bee worn a little. During normal driving it might have worn out the coating on the stub shaft. What do you think?

Onyx 02

iTrader: (7)

The 4 wheel drive models have a 1 piece aluminum driveshaft stock. I bought my 00 Z-71 new and it has it. The reason why it has a 1 piece is because of the transfer case. The 2 wheel drives do not have the extra length of the transfer case, therefore they have a 2 piece driveshaft with a carrier bearing to keep the correct pinion angle in the longer wheel base.

Zick

iTrader: (18)

Oh yeah...Duh