Road Wheels and Tyres (04.04)
Suspension (04.00)
4-5-4
Workshop Manual
October 2005
Road Test
A tyre vibration diagnostic procedure always begins with a road test. The road test and customer interview (if available)
will provide much of the information needed to find the source of a vibration.
During the road test, drive the vehicle on a road that is smooth and free of undulations. If vibration is apparent, note and
record the following:
• The speed at which the vibration occurs
• What type of vibration occurs in each speed range
• How the vibration is affected by changes in the following types of vibration-sensitivity:
Torque Sensitive -
This means that the condition may be improved or made worse by accelerating, decelerating,
coasting, maintaining a steady vehicle speed or applying engine torque.
Vehicle Speed Sensitive -
This means that the vibration always occurs at the same vehicle speed and is not affected by
engine torque, engine speed or the transmission gear selected.
Engine Speed Sensitive -
This means that the vibration occurs at varying vehicle speeds when a different transmission
gear is selected. It may sometimes be isolated by increasing or decreasing engine speed with the transmission in NEUTRAL
or by stall testing with the transmission in gear. If the condition is engine speed sensitive, the cause is probably not related
to the tyres.
If the road test indicates that there is tyre whine, but no shake or vibration, the noise originates with the contact between
the tyre and the road surface.
A thumping noise usually means that the tyre has a flat or soft spot making a noise as they slap the roadway. Tyre whine
may be distinguished from axle noise. Tyre whine remains the same over a range of speeds.
Symptoms
Symptom
Possible Source(s):
Action(s)
Tyres show excess wear on
edge of treads
Tyres under-inflated
Correct pressure to specification.
Vehicle overloaded
Correct as required.
Tyres show excess wear on
edge of treads (having the
correct tyre pressures)
Incorrect toe setting
Set to specification.
Tyres show excess wear in
center of tread
Tyres over-inflated
Correct pressure to specification.
Other excessive tyre wear
problems
Incorrect tyre pressure
Correct pressure to specification.
Incorrect tyre and wheel usage
Install correct tyre and wheel combination.
Geometry out of alignment
Check and adjust.
Loose, worn or damaged suspension
components
Inspect, repair or install new suspension
components as necessary.
Wheel and tyre assembly out of
balance
Balance wheel and tyre assembly.
Excessive lateral or radial runout of
wheel or tyre
Check, repair or install a new wheel or tyre as
necessary.
Wheel mounting is difficult
Incorrect application or mismatched
parts, including wheel studs and wheel
nuts. Corroded, worn or damaged parts
Clean or install new parts.
Wobble or shimmy affecting
wheel runout
Damaged wheel (eventually damaging
wheel bearings and causing uneven
tyre wear)
Inspect wheel rims for damage and runout.
Install a new wheel rim as necessary.
Excessive vibration, rough
steering or severe tyre wear
Loose or incorrect attaching parts
Tighten or install new parts.
Summary of Contents for V8 Vantage
Page 1: ...Workshop Manual Issue 1 ...
Page 15: ...Body Structure 01 01 Body System 01 00 1 1 4 Workshop Manual October 2005 ...
Page 17: ...Front End 01 02 Body System 01 00 1 2 2 Workshop Manual October 2005 ...
Page 27: ...Interior Trim 01 05 Body System 01 00 1 4 8 Workshop Manual October 2005 ...
Page 31: ...Mirrors 01 09 Body System 01 00 1 6 2 Workshop Manual October 2005 ...
Page 33: ...Seating 01 10 Body System 01 00 1 7 2 Workshop Manual October 2005 ...
Page 51: ...Handles and Lock Mechanisms 01 14 Body System 01 00 1 10 4 Workshop Manual October 2005 ...
Page 57: ...Wipers and Washer System 01 16 Body System 01 00 1 11 6 Workshop Manual October 2005 ...
Page 61: ...Bumpers 01 19 Body System 01 00 1 12 4 Workshop Manual October 2005 ...
Page 88: ...Engine Assembly 03 00 Engine 03 00 3 1 10 Workshop Manual October 2005 ...
Page 94: ...Engine Structure 03 01 3 2 6 Workshop Manual October 2005 ...
Page 98: ...Lubrication System 03 02 Engine 03 00 3 3 4 Workshop Manual October 2005 ...
Page 116: ...Fuel Charging System 03 04 3 5 8 Workshop Manual October 2005 ...
Page 120: ...Engine Cranking System 03 06 3 7 2 Workshop Manual October 2005 ...
Page 122: ...Ignition System 03 07 Engine 03 00 3 8 2 Workshop Manual October 2005 ...
Page 126: ...Emission Control 03 08 Engine 03 00 3 9 4 Workshop Manual October 2005 ...
Page 128: ...Valve Train 03 09 Engine 03 00 3 10 2 Workshop Manual October 2005 ...
Page 132: ...Engine Sealing 03 10 Engine 03 00 3 11 4 Workshop Manual October 2005 ...
Page 134: ...Power Conversion 03 11 Engine 03 00 3 12 2 Workshop Manual October 2005 ...
Page 136: ...Air Charging 03 12 Engine 03 00 3 13 2 Workshop Manual October 2005 ...
Page 142: ...Engine Management System 03 14 Engine 03 00 3 15 4 Workshop Manual October 2005 ...
Page 144: ...Throttle Control 03 16 Engine 03 00 3 16 2 Workshop Manual October 2005 ...
Page 159: ...Rear Suspension 04 02 Suspension 04 00 4 3 6 Workshop Manual October 2005 ...
Page 169: ...Shock Absorber System 04 03 Suspension 04 00 4 4 10 Workshop Manual October 2005 ...
Page 193: ...Rear Disc Brakes 06 04 Brake system 06 00 6 2 4 Workshop Manual October 2005 ...
Page 205: ...Brake Actuation System 06 06 Brake System 06 00 6 4 8 Workshop Manual October 2005 ...
Page 217: ...Transmission Cooling 07 02 Transmission 07 00 7 1 4 Workshop Manual October 2005 ...
Page 225: ...Manual Transmission 07 03 Transmission 07 00 7 2 8 Workshop Manual October 2005 ...
Page 259: ...Power Steering 11 02 Steering 11 00 11 2 4 Workshop Manual October 2005 ...
Page 270: ...Body Ventilation system 12 01 Climate Control 12 00 12 1 6 Workshop Manual October 2005 ...
Page 272: ...Heater System 12 02 12 2 2 Workshop Manual October 2005 ...
Page 297: ...Horn Subsystem 13 06 Information Gauge and Warning 13 00 13 2 2 Workshop Manual October 2005 ...
Page 306: ...Battery System 14 01 Power Supply 14 00 14 1 8 Workshop Manual October 2005 ...
Page 316: ...Antenna 15 02 Vehicle Entertainment 15 00 15 2 2 Workshop Manual October 2005 ...
Page 326: ...Interior Lighting 17 02 Lighting 17 00 17 2 2 Workshop Manual October 2005 ...
Page 330: ...Lighting Mechanisms 17 04 Lighting 17 00 17 4 2 Workshop Manual October 2005 ...
Page 355: ...Circuit Diagrams ...
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Page 393: ...Active Anti Theft System 19 01 Electronic Features 19 00 19 1 6 Workshop Manual October 2003 ...