Vibration

NOTE: Do not align the vehicle for vibration concerns. Vibration cannot be improved or eliminated by alignment.

If vehicle vibration persists after the wheels have been balanced, it may be caused by either tire or wheel runout. The vibration may also be caused by irregular tire wear, damage to the tire tread or sidewall, a bent or unbalanced driveshaft, engine vibration, or misindexed tires and wheels.

Tire and Wheel Runout

Tools Required:

• Rotunda Run-Out Gauge 007-00014

Excessive radial and lateral runout of a wheel and tire assembly can cause roughness, vibration, wheel tramp, tire wear, and steering wheel nibble (tremor).

To avoid false readings caused by temporary flat spots in the tires, check runout only after the vehicle has been driven. Visually inspect the tire carcass for abnormal bulges, distortions, etc.

The extent of runout should be measured with Radial Run-Out Gauge 007-00014 or equivalent. All measurements should be made on the vehicle with the tires inflated to recommended load inflation pressures and with the wheel bearing adjusted to specification.

For servicing and adjustments, refer to Section 00-04.