INFO: STEERING WHEEL VIBRATIONS
TT-40-31-001 - September, 1998
Wheel Balance Concerns/Steering Wheel Vibration - 1999 Galant. The factory is investigating wheel balancing difficulties and possible related steering wheel vibration.
TT-40-35-001 - September, 1998
Shaking When Braking - 1999 Galant. Out-of-round rear brake drums may be the culprit in cases of steering wheel shaking when braking from about 50 - 30 mph.
TT-41-31-001 - October, 1998
Wheel Balance Concerns/Steering Wheel Vibration - 1999 Galant. The factory is investigating wheel balancing difficulties and possible related steering wheel vibration.
TT-43-31-002 - December, 1998
Wheel Balance Concerns/Steering Wheel Vibration - 1999 Galant. The factory is investigating wheel balancing difficulties and possible related steering wheel vibration.
TT-43-35-001 - December, 1998
Shaking When Braking - 1999 Galant. Out-of-round rear brake drums may be the culprit in cases of steering wheel shaking when braking from about 50 - 30 mph.
TT-44-31-001 - January, 1999
Wheel Balance Concerns/Steering Wheel Vibration Update - 1999 Galant. Thank you to all technicians who sent in TCS Quality Reports on wheel balancing difficulties and steering wheel vibration. As a result, improved lower control arm bushings are installed in vehicle production since 11/9/98. And the new bushings (p/n MR455736) are available to eliminate steering wheel shimmy when braking or driving over 65 mph. Refer to TSB-99-33A-001, issued this month.
<span style='color:red'>TSB-99-33A-001REV - July, 1999</span>
PURPOSE
This bulletin describes appropriate diagnosis and repair for steering wheel shimmy and brake judder.
Customers may report steering wheel shimmy when traveling at approximately 65-75 mph. Shimmy is identified as when the steering wheel oscillates quickly from side-to-side (not up and down).
Brake judder is a similar condition which could be mistaken for shimmy. Brake judder is identified as when the steering wheel shakes rapidly up and down when braking (typically from 70 mph or from 35 mph).
New, improved lower arm bushings (listed in the PARTS INFORMATION section of this bulletin) are available to eliminate the steering wheel oscillation when braking or driving over 65 mph.
•If the shimmy continues after the bushings are replaced, tires or wheels may be the cause. Wheel balancing and/or tire rotation may be necessary.
•If the brake judder continues after the bushings are replaced, rear brake drum replacement and/or front brake rotor re-surfacing may be necessary.
AFFECTED VEHICLES
1999 Galant models equipped with 2.4L engine produced before 11/9/98 (VIN XE067461)
PROCEDURE
1.Note customer's reported conditions of when the shimmy or judder occurs.
2.Replace the lower arm bushings on both sides of the vehicle, using the new, improved bushing listed in the PARTS INFORMATION section of this bulletin. Refer to Group 33 of the 1999 Galant service manual.
3.Test drive the vehicle to verify whether the condition has been eliminated.
a.If the customer's complaint was steering wheel shimmy, and the condition continues, go to Step 4.
b.If the customer's complaint was brake judder, and the condition continues, go to Step 5.
4.Steering Wheel Shimmy:
a.Re-balance the wheels, then test drive the vehicle to verify whether the shimmy is eliminated.
b.If the shimmy continues, rotate the tires. Install the rear tires on the front, and install the front tires on the rear.
c.Test drive the vehicle to verify that the shimmy is eliminated.
5.Brake Judder:
a.Determine whether the judder is from the front or the rear of the vehicle. While driving at about 35 mph, pull up on the parking brake lever gently.
(1)If a vibration is felt, the rear brake drums are out-of-round. Replace the rear brake drums.
(2)If no vibration is felt, the front brake rotors require re-surfacing. Using an on-car brake lathe, re-surface the brake rotors as described in Group 35 of the service manual. If an on-car brake lathe is unavailable, replace the brake rotors.
b.Test drive the vehicle to verify that the brake judder is eliminated.
PARTS INFORMATION
Description Part Number
Lower Arm Bushing MR455736
Front Disk Rotor MR389724
Rear Brake Drum MB895659
-MIKE.
my galant is doing the same thing
i am having a problem with my stering wheel vibrating when i exceed 70mph....
I am assuming...my rotors might be warped, so i have ordered some cross drilled rotors....and ceramic brakes....i hope the problem goes away....