Canada - Wheels/Tires - Highway Speed Steering Wheel Flutter: Overview

L-TCI-370

July 27, 2012

STEERING WHEEL FLUTTER AT HIGHWAY SPEEDS

Service Category
Steering

Section
Steering Gear/Linkage

Market
Canada





APPLICABILITY:


INTRODUCTION:
Some vehicles may exhibit a steering flutter condition while driven at approximately 88kph - 110kph (55 - 70 mph). In some cases, this concern is caused by a wheel imbalance or RFV (Radial Force Variation) that is out of range. If the tire and wheel assembly is satisfactory, a steering control valve preload spring is available to reduce the steering flutter felt through the steering wheel.






WARRANTY INFORMATION:






PARTS INFORMATION:






REQUIRED TOOLS & EQUIPMENT:





TSB OVERVIEW

1. Check for source of steering flutter - if tires/wheels or other causes are eliminated as the source of flutter, proceed to next step.

2. Remove the steering rack.

3. Replace the rack guide preload spring with one of four springs with different spring rates.

4. Check steering rack preload.

5. If necessary, install different spring until desired preload is achieved.

6. Reinstall the steering rack.