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NVG 126/226 Transfer Case Grating/Grinding Noise When 4WD is Engaged, Service 4WD Lamp On, DTC C0327 Set (Replace Clutch Pressure Plate Bearing Assembly and Clutch Lever)

Subject:NVG 126/226 Transfer Case Grating/Grinding Noise When 4WD is Engaged, Service 4WD Lamp On, DTC C0327 Set (Replace Clutch Pressure Plate Bearing Assembly and Clutch Lever)

Models:2004-2007 Buick Rainier
2002-2008 Chevrolet TrailBlazer Models
2002-2008 GMC Envoy Models
2002-2004 Oldsmobile Bravada
2005-2008 Saab 9-7X
Built Prior to September 18, 2007 (NVG 126) or September 21, 2007 (NVG 226)



This bulletin is being revised to add the 2002 model year. Please discard Corporate Bulletin Number 08-04-21-001 (Section 04 - Transmission/Transaxle).


Condition

Some customers may comment on a grinding type noise in the transfer case when 4WD is engaged in either AUTO or 4WD mode. This noise may also be accompanied by the SERVICE 4WD lamp being illuminated and DTC C0327 set.

This condition is more prevalent on vehicles where 4WD is continuously used.

Cause

This noise may be caused by a faulty clutch pressure plate bearing.

Correction

A more robust clutch pressure plate bearing, inner plate and clutch lever has been released for service. Replace the clutch pressure plate bearing, inner plate and clutch lever. Refer to the Transfer Case Disassemble and Transfer Case Assemble procedures in SI. Former and new parts should not be intermixed during transfer case overhaul and they are to be used in sets only.

DO NOT replace the transfer case assembly unless extensive internal damage has occurred.

Parts Information

Part Number

Description

19178973

Clutch Pressure Plate Bearing Assembly with Inner Plate

19178970

Clutch Lever

24242560 (NVG 126)

Transfer Case

24242561 (NVG 226)

Transfer Case

Warranty Information (excluding Saab U.S. Models)

For vehicles repaired under warranty, use the appropriate labor operation for the repair performed:

Labor Operation

Description

Labor Time

K4400

Transfer Case Assembly - R&R

Use Published Labor Operation Time

K4410

Transfer Case Assembly - Replace

Use Published Labor Operation Time

Warranty Information (Saab U.S. Models)

For vehicles repaired under warranty, use:

Labor Operation

Description

Failed Object

Fault/Reason Code

Location Code

Warranty Type

Repair/Action Code

Labor Time

4411001

Transfer Case Assembly - R&R

(Engine Code S)

44100

47

0

01

01

Use Published Labor Operation Time

4411007

Transfer Case Assembly - R&R

(Engine Code M)

44100

47

0

01

01

Use Published Labor Operation Time

4411009

Transfer Case Assembly - Replace

(Engine Code S)

44100

47

0

01

01

Use Published Labor Operation Time

4411010

Transfer Case Assembly - Replace

(Engine Code M)

44100

47

0

01

01

Use Published Labor Operation Time