Power Steering Zip Noise; Driveline Noise And Vibration; Suspension Noise And Vibration - Ford Transit 2002 Owner's Manual

Symptom
Power steering system grinding noise –
an abrasive noise (like sand paper
rubbing against wood) occurs between
moving components such as steering
wheel and the steering column shroud.

Power Steering Zip Noise

Symptom
Power steering system zip noise – occurs when
hydraulic fluid does not flow freely through the
power steering pump supply hose from steering
fluid reservoir to power steering pump causing
cavitation at the pump. Zip is primarily a cold
weather start-up phenomenon (below -10°C).

Driveline Noise and Vibration

Symptom
Shake and vibration while driving
Tip-in moan
Idle boom/shake/vibration/shudder

Suspension Noise and Vibration

Symptom
Wheel end vibration analysis
Non-axle noise
Pinpoint Tests
NOTE: These Pinpoint Tests are designed to take the technician through a step-by-step
diagnosis procedure to determine the cause of a condition. It may not always be
necessary to follow the chart to its conclusion. Carry out only the pinpoint test steps
Possible Sources
Steering wheel to
shroud interference.
Steering column
bearing.
Foreign material in
contact with the
steering column
shaft.
Clockspring.
Possible Sources
High viscosity of
power steering
fluid at low
temperature.
Aeration of the
power steering
fluid.
Possible Sources
Wheel end vibration.
Engine/transmission.
Air cleaner.
Power assisted steering.
Powertrain.
Powertrain/drivetrain mounts.
Exhaust system.
Cable(s)/hose(s).
Powertrain/drivetrain mounts.
Exhaust system.
Belt/pulleys.
Possible Sources
Suspension.
Wheel bearings.
Trim panels.
Air conditioning (A/C) system.
Accessories.
http://vnx.su
Action
Certain amount of noise level
acceptable, not a safety critical
item.
Certain amount of noise level
acceptable, not a safety critical
item.
CHECK if floor covering is
obstructing the steering gear
pinion.
CHECK the installation of the
floor seal.
CHECK the clockspring and
secure if necessary.
REFER to: Clockspring -
Vehicles Built From: 04/2009
(501-20B Supplemental
Restraint System, Removal and
Installation).
Action
Certain amount of noise
level acceptable, not a
safety critical item.
BLEED the power steering
system.
REFER to: Power Steering
System Bleeding
Steering System -
General Information,
General Procedures).
Action
GO to Pinpoint Test
GO to Pinpoint Test
GO to Pinpoint Test
Action
GO to Pinpoint Test
GO to Pinpoint Test
(211-00
A.
B.
C.
D.
E.