Mustang Cobra V8-281 4.6L DOHC VIN V MFI (1997)
Engine Mount: All Technical Service Bulletins
Suspension/Frame - Vibration/Shake at 62 mph
Article No.
00-9-7
DATE
5/1/00
TITLE
VIBRATION/SHAKE - AT STEADY SPEED APPROXIMATELY 100 KM/H (62 MPH) - VEHICLES WITH 4.6L ENGINE AND CONVERTIBLE
TOP
FORD:
1996-1998 MUSTANG
ISSUE
A vibration/shake while driving at a steady speed of approximately 100 km/h (62 mph) on smooth roads may occur on some vehicles. This may be due to
the interaction between the body and suspension modes.
ACTION
Perform Steps 1-7 of the Service Procedure to insure the vibration is not due to any common cause condition. If vibration is still unacceptable, install the
components listed in this TSB article to reduce the vehicle's sensitivity to vibration. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
1. Verify the tires are not flat spotted, out of round, or excessively worn and the rims are not damaged or untrue.
2. Set all tire pressures to the pressure recommended on the vehicle label.
3. Verify that the lateral and radial runout of the wheel is less than 1.14 mm (0.045"), then check to make sure the tires are properly balanced on a
calibrated tire balancer.
4. Normalize engine and transmission mounts to eliminate possible stressed or bound up conditions.
5. Check for loose suspension fasteners, control arms, steering rack, engine mounts, crossmember, etc.
6. Replace any worn suspension or steering components.
7. Re-evaluate the vehicle. If OK, return to the customer. Some Mustang convertibles may be more sensitive to vibration than others. If unacceptable
vibration is still detectable, perform the remaining Steps of this TSB.
8. Remove the negative battery cable.
9. Replace the engine mounts with a new set of Engine Mounts (XR3Z-6038-DA - RH and XR3Z-6038-DB - LH; these mounts are of a higher
stiffness). Refer to the 1998 Mustang Workshop Manual for replacement procedure.