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00-03-10-006I Information on Tire Radial Force Variation (RFV) - (Jan 28 2013) Tires - part 5

Rating:
Usually a back cone method to the machine should beused. For added accuracy and repeatability, a flange plate should be used to clampthe wheel onto the cone and machine. This system is offered by all balancer manufacturersin GM'sdealer program.Any type of service equipment that removes tread rubber by grinding, buffing or truingis NOT recommended, and may void the tire warranty. However, tires may have been groundby the tire company as part of their tire manufacturing process. This is a legitimateprocedure.If the equipment being used is capable of performing a centering check, the centeringcheck must be completed before taking measurements of balance or RFV.Steering Wheel Shake Worksheet

When diagnosing vibration concerns, use the following worksheet in conjunction withthe appropriate Vibration Analysis-Road testing procedure in the Vibration Correctionsub-section in SI.

Refer to the appropriate section of SI for specifications and repair procedures thatare related to the vibration concern.

Steering Wheel Shake Worksheet

To:

Dealer:

Fax Number:

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VIN__ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __

-

-

Procedure Performed By:

Date:

Model:

Year:

Odometer:

VIN __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __

TAC Case #, if applicable:

Conditions During Road Test Procedures

As condition occurs: Engine RPM_____________

Vehicle Speed__________________

Vibration/Noise detected during the following road test procedures:

Engine RPM_______________ Vehicle Speed_______________

Slow Acceleration Test: Yes__________ No__________

Neutral Coast-Down Test: Yes__________ No__________

Downshift Test: Yes__________ No__________

Neutral Run-Up Test: Yes__________ No__________

Steering Input Test: Yes__________ No__________

When using the EVA, always take a snapshot. This will help determine which vibrationshows up the most.

Important:Vibrate software can also be used to assist in vibration diagnosis. Refer to VibrateSoftware Description and Operation in SI.

EVA Readings

Refer to Electronic Vibration Analyzer (EVA) Description and Operation in SI for moredetailed information.

Important:As a reminder, place the EVA sensor where the vibration is mostly felt. Ensure theword “UP” on the sensor is physically facing up. The typical areas are the seat track,the steering column or the instrument panel. Locating the EVA sensor on additionalarea (i.e. the right fender, left fender, right quarter panel, left quarter panel,rear seat track, etc.) may also assist in determining the componentcausing the vibration/noise. The key is to look for the same Hz reading with the greatestamplitude G readings.

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FILL OUT ONLY THE APPLICABLE PORTION OF THE WORKSHEET THAT APPLIES TO THE VIBRATION/NOISE:

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Sensor at Steering Column:

1st Line MPH/KPH:__________ HZ:__________ Gs:__________

2nd Line MPH/KPH:__________ HZ:__________ Gs:__________

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Sensor at Roof:

1st Line MPH/KPH:__________ HZ:__________ Gs:__________

2nd Line MPH/KPH:__________ HZ:__________ Gs:__________

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Sensor at Passenger Seat Rail:

1st Line MPH/KPH:__________ HZ:__________ Gs:__________

2nd Line MPH/KPH:__________ HZ:__________ Gs:__________

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Tire Size and Brand:_____________________________________

Wheel/Tire Runouts on vehicle (max. 0.050 in (1.27 mm))

Refer to the latest version of Corporate Bulletin Number 00-03-10-006 for tire radialforce variation.

Right rear: Inner lateral:__________ Center radial:__________

Left rear: Inner lateral:__________ Center radial:__________

Right front: Inner lateral:__________ Center radial:__________

Left front: Inner lateral:__________ Center radial:__________

Mounting surface runouts (max. 0.005 in (0.127 mm))

Flange, right rear:__________ Hub, right front:__________

Flange, left rear:__________ Hub, left front:__________

Wheel stud runouts (max. 0.008 in (0.203 mm))

Flange, right rear:__________ Hub, right front:__________

Flange, left rear:__________ Hub, left front:__________

List Additional Repairs, If Applicable

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GM bulletins are intended for use by professional technicians,NOT a "do-it-yourselfer".  They are written to inform thesetechnicians of conditions that may occur on some vehicles, or toprovide information that could assist in the proper service of avehicle.  Properly trained technicians have the equipment,tools, safety instructions, and know-how to do a job properly andsafely.  If a condition is described, DO NOT assume that thebulletin applies to your vehicle, or that your vehicle will havethat condition.  See your GM dealer for information on whetheryour vehicle may benefit from the information.

#00-03-10-006I: Information on Tire Radial Force Variation (RFV) - (Jan 28, 2013) Tires

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