Ascender 4WD V8-5.3L (2004)
Seals and Gaskets: All Technical Service Bulletins
Drivetrain - Squeal/Squeak/Whistle Noise From Front End
TSB SB05-07-5002
Squeak Squeal or Whistle Noise from Front
Light Duty ASCENDER 2003 Bulletin Driveline 08/01/05
Light Duty ASCENDER 2004 Bulletin Driveline 08/01/05
Light Duty ASCENDER 2005 Bulletin Driveline 08/01/05
ISSUE DATE: AUGUST 2005
Affected Vehicles:
2003-2005 Isuzu Ascender (US/UT) 4WD
Service Information
Condition:
Some customers may comment on a high pitched squeal, squeak or whistle noise in the front end of the vehicle. This noise usually occurs once per wheel
revolution. This may be more common in cold weather below 5°C (40°F). The noise may be coming from the right front axle intermediate shaft housing
outboard seal or the left outer differential carrier seal. For testing purposes, spraying a lubricant on the seal should temporarily reduce the noise. This
noise should not be mistaken for a wheel bearing issue.
Possible Cause:
A lack of lubrication in the seal may cause this condition.
Correction:
Replace the right front axle intermediate shaft housing outboard seal or the left outer differential carrier seal using the following procedure and part
number listed below. Refer to the Service Manual for further instructions.
Service Procedure