Ford Mustang (1999-2004) Service Manual: Symptom Chart

Condition Possible Sources Action
  • Traction-Lok does not work in snow, mud or on ice
  • Differential.
  • CARRY OUT the Traction- Lok Differential Operation Check in this section. REPAIR as necessary.
  • Lubricant leaking from the pinion seal, axle shaft oil seals
  • Vent.
  • Damage in the seal contact area or damaged or worn seal.
  • CLEAN the axle housing vent.
  • INSTALL a new seal if damage is found.
  • Differential side gears/pinion gears are scored
  • Insufficient lubrication.
  • Incorrect or contaminated lubricant type.
  • INSTALL new gears.
  • INSTALL new gears.
  • Axle overheating
  • Lubricant level too low.
  • Incorrect or contaminated lubricant type.
  • Bearing preload adjusted too tight.
  • Excessive gear wear.
  • Incorrect ring gear backlash.
  • CHECK the lubricant level.

    FILL the axle to specification.

  • INSPECT the axle for damage. REPAIR as necessary. CLEAN and REFILL the axle to specification.
  • CHECK the ring and pinion for damage. INSPECT the ring and pinion wear pattern.

    ADJUST the preload as necessary.

  • INSPECT all the axle gears for wear or damage. INSTALL new components as necessary.
  • INSPECT the ring gear for scoring. INSPECT the ring and pinion wear pattern.

    ADJUST the ring gear backlash as necessary.
  • Broken gear teeth on the ring gear or pinion
  • Overloading the vehicle.
  • INSTALL a new ring and pinion.
  • Axle shaft broken
  • Overloading the vehicle.
  • Misaligned axle shaft tube.
  • INSTALL a new axle shaft.
  • INSPECT the axle for damage. CHECK axle shaft tube alignment. INSTALL a new axle shaft
    Knock
    Knock, which can occur on all driving phases, has several causes including damaged teeth or gearset. In most cases, one of the following conditions will occur: 1. A gear tooth damaged on the drive s ...

    Component Tests
    Driveline Vibration An analysis of driveline vibration can also be conducted using the Vibration Analyzer; follow the manufacturer's directions. Driveline vibration exhibits a higher frequency and l ...

    Other materials:

    System Air Flow Description
    MAX A/C When MAX A/C is selected: The air inlet door vacuum control motor is at full vacuum, closing off outside air and admitting only recirculated air. The panel/defrost door vacuum control motor is at full vacuum and the panel/floor door vacu ...

    Pinpoint Tests - Air Bag Supplemental Restraint System (SRS)
    Special Tool(s) 73III Automotive Meter 105-R0057 or equivalent Diagnostic Tool, Restraint System 418-F088 (105-R0012) Worldwide Diagnostic System (WDS) 418-F224, New Generation STAR (NGS) Tester 418-F052, or e ...

    Wheel
    Removal and Installation 1. Disconnect the battery ground cable (14301) and wait at least one minute to allow the depletion of the restraint system backup power supply. 2. Turn the steering wheel to the straight-ahead position and the ignition switch to ...