'A'AND'X'CAR VIBRATION- INITIATED BY TIRE AND WHEEL. Pontiac Phoenix 1982

For 1990-2009 cars

# 'A'AND'X'CAR VIBRATION- INITIATED BY TIRE AND WHEEL

#### Subject: 1982 PHOENIX AND 6000 STANDARD WHEEL VIBRATION

Some 1982 Phoenix and 6000 cars could experience an objectionable ride vibration that wheel balancing will not correct.

Steel 13 inch wheels, code "TZ," part number 9590763, built by Hydra-Matic-Warren from May 24 through June 22, 1982 may have excessive radial runout (in excess of .040).

These wheels can be identified by the code stamped near the valve as follows:

If a vibration is encountered on a Phoenix or 6000 equipped with these wheels, all wheels with the above codes should be replaced before wheel balancing is attempted.

The wheel replacement procedure must include match mounting the tire's high point dot to the new wheel's valve (the low point), balancing wheels and color coating if necessary. if the tire's high point dot cannot be found, mark the tire at the valve stem on the old wheel and align the valve on the new wheel to this mark.

Diagnosis of vibrations on cars not equipped with the "TZ" wheels should follow normal procedures per the Service Manual.

Use existing labor operation and times.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.