Ford Mustang (1999-2004) Service Manual: Driveline Angle
| Item | Description |
| 1 | Bottom of the frame |
| 2 | Engine crankshaft centerline |
| 3 | Engine angle |
| 4 | Driveshaft and coupling shaft centerline |
| 5 | Driveshaft and coupling shaft angle |
| 6 | Rear axle pinion centerline |
| 7 | Axle pinion angle |
An incorrect driveline (pinion) angle can often be detected by the driving condition in which the vibration occurs.
- A vibration during coastdown from 72 to 56 km/h (45 to 35 mph) is often caused by an excessive U-joint angle at the axle (pinion nose downward).
- A vibration during acceleration, from 56 to 72 km/h (35 to 45 mph) may indicate an excessive Ujoint angle at the axle (pinion nose upward).
When these conditions exist, check the driveline angles as described in the General Procedures portion of this section.
If the tires and driveline angle are not the cause, carry out the NVH tests to determine whether the concern is caused by a condition in the axle.
Universal Joint (U-Joint) Wear
Place the vehicle on a frame hoist and rotate the driveshaft by hand. Check for rough operation or seized U-joints. Install a new U-joint if it shows signs of seizure, excessive wear, or incorrect seating.
Analysis of Vibration
WARNING: A vehicle equipped with a Traction-Lok differential will
always have both
wheels driving. If only one wheel is raised off the floor and the rear axle is
driven by the engine,
the wheel on t ...
Wheel Hub or Axle Flange Bolt Circle Runout
NOTE: The brake discs must be removed to carry out all runout
measurements.
1. Position the special tool perpendicular to the wheel hub or axle flange bolt,
as close to the hub
or flange face as po ...
Other materials:
Tire Wear Chart
Wheel and tire NVH concerns are directly related to vehicle speed and are not
generally affected by
acceleration, coasting or decelerating. Also, out-of-balance wheel and tires can
vibrate at more than
one speed. A vibration that is affected by the engine ...
Pinpoint Test A: The Air Bag Warning Indicator Is Illuminated Continuously
- RCM
Disconnected, Inoperative or Lost/Low Ignition Feed
Normal Operation
NOTE: During normal operation the air bag indicator will be lit continuously
for 6 seconds after the
ignition switch is placed in the RUN position and after five cycles of a lamp
fault code (LFC) if a fault
exists. Be sure to cycle the ignit ...
Interior Lighting (Diagnosis and Testing)
Refer to Wiring Diagrams Cell 111 , Remote Control Alarm and Lock System
for schematic and
connector information.
Refer to Wiring Diagrams Cell 59 , Generic Electronic Module for schematic
and connector
information.
Refer to Wiring Diagrams Cell 89 , ...
