revised front prop shaft

[the blur]

i remember seeing a tsb for a revised front drive shaft for my 03 denali.

can you please re-post it.

when coasting on the highway, or decelaration, the front axle feels like it's rubbing or making some funky noise. I believe that tsb addressed the issue, and my local dealer wasn't too helpful.

 

also, how long do the auto-ride front shocks last?

my truck started bouncing all over the road after a bump...

[MS3DALE]

I think this is what your looking for.....

 

 

Document ID# 1265103

2003 GMC Truck Yukon Denali

 

 

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Subject: Whine Noise From Front Axle (Diagnose and Replace Front Propeller Shaft with a Tuned Internally Dampened Front Propeller Shaft) #03-04-17-005 - (03/13/2003)

 

 

 

Models: 2002-2003 Cadillac Escalade, Escalade EXT

 

2000-2003 GMC Yukon Denali, Yukon XL Denali

 

2001 GMC Sierra C3

 

2002-2003 GMC Sierra Denali

 

with AWD Transfer Case (RPO NP3 or NR3)

 

 

 

 

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Condition

Some customers may comment on a slight whine noise from the front of the vehicle during light throttle conditions, typically at two vehicle speed ranges of 64-80 km/h (40-50 mph) and 112-129 km/h (70-80 mph).

 

Cause

"Inherent" ring and pinion gear whine.

 

All gear driven units, such as automotive rear axles, produce some level of noise that cannot be eliminated with conventional adjustments and repairs. "Inherent" axle noise can be described as a slight noise heard only at a certain speed on most General Motors® trucks. The presence of this noise is not indicative of a functional concern with the axle assembly. However, some customers may find that this "inherent" axle noise is unacceptable.

 

Correction

Replace the front propeller shaft with an internally tuned dampened shaft ONLY after diagnosis concludes that it is an "inherent" front axle noise and no physical damage or incorrect adjustment exists.

 

Diagnostic Information and Procedure for Front Axle Noise

• Diagnostic Starting Point - Front Drive Axle (Refer to SI Document ID #696970).

 

• Symptoms - Front Drive Axle (Refer to SI Document ID #696957).

 

• Front Drive Axle Noises (Refer to SI Document ID #700621).

 

• Noisy in Drive (Refer to SI Document ID #700622).

 

• Noisy When Coasting (Refer to SI Document ID #700624).

 

• Intermittent Noise (Refer to SI Document ID #700625).

 

• Constant Noise (Refer to SI Document ID #700631).

 

• Noisy on Turns (Refer to SI Document ID #700634).

 

Front Propeller Shaft Replacement

Raise the vehicle. Refer to Lifting and Jacking the Vehicle (SI Document ID #737171).

Important: Before disassembly, observe and accurately mark all of the driveline components relative to the propeller shaft and to the axles. These items include the following components:

 

• The propeller shafts

 

• The wheel drive shafts

 

• The pinion flanges

 

• The output shafts

 

Assemble all of the components in the exact relationship to each other prior to removal. Observe all published specifications and torque values and any measurements obtained prior to disassembly.

 

Remove the transfer case shield, if equipped.

 

 

 

Remove the clamp (if applicable) (4) at the transfer case (3) by prying up the exposed end of the clamp (4) with a flat-bladed tool.

 

 

 

Remove the bolts (6) and the yoke retainers (7) from the front axle pinion yoke (1).

Notice: When removing the propeller shaft, do not attempt to remove the shaft by pounding on the yoke ears or using a tool between the yoke and the universal joint. If the propeller shaft is removed by using such means, the injection joints may fracture and lead to premature failure of the joint.

 

Disconnect the propeller shaft (2) from the front axle pinion yoke (1).

Remove the propeller shaft (5) from the transfer case output shaft by sliding the propeller shaft forward.

Inspect the splines of the transfer case output shaft for a sufficient coating of lubricant. If the output shaft does not have a sufficient coating of lubricant, lubricate the shaft with lubricant, P/N 12345879 (Canadian P/N 10953511), or with an equivalent lubricant meeting GM specification 9985830.

Important: Some old driveshaft boots may only use a single clamp design. When installing the new propeller shaft, use ONLY a two clamp boot.

 

Install the new clamp, P/N 26064275, supplied with the new propeller shaft, P/N 15186002, into the groove of the propeller shaft boot.

Install the propeller shaft splines into the transfer case output shaft.

Install the propeller shaft to the front axle pinion yoke.

Install the yoke retainers and the bolts.

Tighten

Tighten the yoke retainer bolts to 25 N·m (19 lb ft).

 

Install the boot onto the transfer case output shaft until the boot is attached into the groove on the output shaft.

 

 

 

Using the J 43218 , crimp the clamp until the dimensions that are shown are obtained.

Install the transfer case shield, if equipped.

Install the transfer case shield mounting bolts, if equipped.

Tighten

Tighten the transfer case shield mounting bolts to 20 N·m (15 lb ft).

 

Lower the vehicle.

Parts Information

Parts are in limited quantities. DO NOT order parts for stock.

 

 

Part Number:15186002

Description:Propeller Shaft, Front

Qty:1

 

 

Parts are currently available from GMSPO.

 

Warranty Information

For vehicles repaired under warranty, use:

 

Labor Operation F1200,Propeller Shaft, Front Of Transfer Case - Replace

Use published labor operation time

 

 

 

 

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

 

 

© Copyright General Motors Corporation. All Rights Reserved.

 

 

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Document ID# 1265103

2003 GMC Truck Yukon Denali

[the blur]

that the one, thanks!

 

where can I get more information on this section?

 

**** • Noisy When Coasting (Refer to SI Document ID #700624). ****

 

I definatly have a noise only when coasting, and I don't want to replace the drive shaft if it is not the solution...

 

thanks !

[MS3DALE]

that the one, thanks!

 

where can I get more information on this section?

 

**** • Noisy When Coasting (Refer to SI Document ID #700624).  ****

 

I definatly have a noise only when coasting, and I don't want to replace the drive shaft if it is not the solution...

 

thanks !

 

 

 

 

 

Ask and you shall recieve,Although it dosen't give much info.......

 

 

Document ID# 700624

 

Noisy When Coasting:

 

 

DEFINITION: Noise is audible when slowing down and disappears when driving.

 

Check for:Worn pinion and ring gear:

Action required:Adjust or replace the pinion and the ring gear. Refer to Differential Carrier Assembly;Disassemble .

 

Check for:Pinion and ring gear too tight:

Action required:Adjust the pinion and the ring gear backlash. Refer to Backlash; Inspection and Adjustment .

 

 

Document ID# 700624

[the blur]

and it doesn't specify front or rear gear set???

 

but I guess it doesn't matter.. I doubt I can convince the dealer to do a ring and pinion under GMPP, and I'm not so sure I want them pulling my front diff apart anyway. I know they are difficult to set up right.

 

So I'm guessing the revised prop shaft isn't the answer..............

[chevroletmb]

that front diff is not hard to set up if you know what your doing.