Montero Sport LS 2WD V6-3.0L SOHC (1998)
Coil Spring Seat: Customer Interest
Differential Whine - Revision
NO: TSB-99-27-001
DATE: June, 1999
MODEL: 1995-99 Montero
SUBJECT:
DIFFERENTIAL WHINE
This bulletin supersedes TSB-98-27-001 dated June, 1998, which should be discarded. New and/or revised information is marked by **.
PURPOSE
This bulletin has procedures for eliminating or reducing an apparent differential whining noise on affected 1995-99 Montero vehicles.
BACKGROUND INFORMATION
Symptom
The customer may complain of a whine coming from the differential at speeds generally between 50 to 60 mph during light acceleration or when
coasting in gear.
Cause
The whining noise may be attributed to differential noises being transmitted through the body and/or out-of-specification tolerances in the differential
itself.
Remedy
Follow the procedures in this bulletin to first test drive the vehicle to assess the severity of the whining noise. Procedures are included for the following
repair steps:
1995-97 MODEL YEAR MONTERO
^
Replace the propeller shaft with a birfield joint (BJ-type) and damper.
^
Apply sound reduction sheets to the floorpan of the vehicle body (under the interior carpet) in the the rear footwell area, under the rear seat
area, and under the rear cargo area floor.
^
Replace the indicated six rubber body mounts.
**
^
Install rear suspension trailing arm dampers on each side of the vehicle.
**
^
Install new upper spring seats on each rear spring.
**1998-99 MODEL YEAR MONTERO (built before 8/25/98)
^
Replace the propeller shaft with a long-yoke BJ-type.
^
Install rear suspension trailing arm dampers on each side of the vehicle.
^
Install new upper spring seats on each rear spring.
**1999 MODEL YEAR MONTERO (built after 8/25/98)
^
Install rear suspension trailing arm dampers on each side of the vehicle.
^
Install new upper spring seats on each rear spring.
1995-99 MODEL YEAR MONTERO
^
In severe cases, replace the differential assembly.
NOTE:
Prior Work Authorization (PWA) from your DPSM is required prior to any differential replacement.
