300M V6-3.5L VIN G (2000)
Tires: Customer Interest
Tires & Wheels - Steering Wheel Vibration
NUMBER:
22-04-99
GROUP:
Wheels & Tires
DATE:
Oct. 29, 1999
SUBJECT:
Steering Wheel Vibration
MODELS:
1998 - 2000 (LH) Concorde/Intrepid/LHS/300M
OVERVIEW
This bulletin involves diagnosis and corrective information for vehicles with a steering wheel vibration.
DIAGNOSIS AND CORRECTION:
Visual Inspection of the vehicle is recommended prior to the initial test drive. Raise vehicle on a suitable hoist and inspect the following items:
^
Verify correct (original equipment) wheel and tire, as well as correct wheel weights. Aluminum wheels require unique wheel weights (after market
part number "LH").
^
Inspect tires and wheels for damage, mud packing and unusual wear; correct as necessary.
^
Check and adjust tire pressure to the pressure listed on the label attached to the rear face of the driver's door.
Road Test on a smooth road for at least 5 miles to warm tires (remove flat spots).
^
Lightly place hands on steering wheel at the 10:00 and 2:00 positions while slowly sweeping up and down from 55 to 70 MPH.
^
Observe steering wheel for:
Visual Nibble (oscillation: clockwise/counter clockwise, usually due to imbalance)
Visual Buzziness (high frequency, rapid vibration up/down)
^
Rule out vibrations due to powertrain or brakes by:
^
Lightly apply brakes; if vibration occurs or is enhanced, vibration is likely due to causes other than tire/wheel assemblies.
^
Shift transmission into neutral while vibration is occurring; if eliminated, vibration is likely due to causes other than tire/wheel
assemblies.
^
For powertrain or brake vibrations refer to pages 5-11 and 5-16 of the 2000 Concorde/Intrepid/LHS/300M service manual
(Publication No.81-270-0040). For tire and wheel assembly vibrations, continue with this procedure.
Balance equipment must be calibrated and maintained per equipment
manufacturer's specifications.
^
Balance assemblies off vehicle dynamically and statically to less than .25 ounce.
^
Rotate assembly 180 degrees on balance equipment and verify balance; variation should not be more than .0125 ounce. If variation is more than
.0125 ounce, balancing equipment could be malfunctioning.
^
If difficult to balance, break down tire/wheel assembly to check for loose debris inside tire.
^
Road test vehicle for at least 5 miles. If vibration persists, continue with this procedure.
Radial Runout must be checked starting with system check, including hub, wheel, and tire.
