Steering/Driveline - High Speed Vibration: Overview

Article No.
98-18-7

09/14/98

^ STEERING COLUMN - HIGH SPEED VIBRATION -
4X4 VEHICLES EQUIPPED WITH COIL
SUSPENSION

^ VIBRATION - HIGH SPEED VIBRATION -
4X4 VEHICLES EQUIPPED WITH COIL SUSPENSION

LIGHT TRUCK:
1997-98 EXPEDITION
1998 NAVIGATOR

This TSB article is being republished in its entirety to include the 1998 model year, revise the Service Procedure and include the latest level parts.

ISSUE

A vibration at highway speeds (approximately 97-113 km/h (60-70 mph)) may occur on some 4X4 vehicles with coil suspension. This vibration, present on cruise, however becomes more noticeable during coastdown. This may be caused by a driveline imbalance which produces a vibration in the seat, steering wheel, floorpan, and a rumble in the vehicle cabin.

ACTION

Refer to the following Service Procedure to determine the correct fix for the condition.

PART NUMBER PART NAME

F75Z-7H408-AA Transfer Case Output Plug
XL1Z-4602-AA Driveshaft (5.4L Vehicles)
XL1Z-4602-BA Driveshaft (4.6L vehicles)

OTHER APPLICABLE ARTICLES: NONE

SUPERSEDES: 97-14-15

WARRANTY STATUS: INFORMATION ONLY

OASIS CODES: 303000, 304000, 508000, 509000,
703000, 703300