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Home >> Ford >> 2002 >> Taurus SES, 3.0 S >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Driveline System - General Information -- Excursion & F250-F550 Super Duty) >> Diagnosis And Testing >> Driveline System >> Symptom Chart

Symptom Chart

WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM

Condition Possible Sources Action
  • Traction-Lok(R) rear axle has a high-pitched chattering noise while turning
  • Lubricant.
  • ROAD TEST the vehicle. DRIVE in tight circles, 5 clockwise and 5 counterclockwise. If the chatter is still evident, FLUSH and REFILL with the specified rear axle lubricant and additive friction modifier. REFER to SPECIFICATIONS  .
  • Differential.
  • Trac-Lok(R) rear axle has a chatter noise while turning
  • Lubricant.
  • Differential.
  • Traction-Lok(R) does not work in snow, mud or on ice
  • Differential.
  • Lubricant leaking from the pinion seal, axle shaft oil seals
  • Vent.
  • CLEAN the differential housing vent and the vent hose.
  • Damage in the seal contact area.
  • INSTALL a new seal and mating surface if damage is found.
  • Front axle will not engage
  • Switches.
  • Wiring.
  • GEM.
  • Shift motor.
  • Vacuum application.
  • REFER to FOUR-WHEEL DRIVE SYSTEMS .
  • Front axle will not disengage
  • Switches.
  • Wiring.
  • GEM.
  • Shift motor.
  • Vacuum application.
  • REFER to FOUR-WHEEL DRIVE SYSTEMS .
  • Differential side gears/pinion gears are scored
  • Insufficient lubrication.
  • Incorrect or contaminated lubricant type.
  • Axle overheating
  • Lubricant level too low.
  • CHECK the lubricant level. FILL the axle to specification.
  • Incorrect or contaminated lubricant type.
  • INSPECT the axle for damage. REPAIR as necessary. CLEAN and REFILL the axle to specification.
  • Bearing preloads too high.
  • CHECK the ring and pinion for damage. INSPECT the ring and pinion wear pattern. ADJUST the preload as necessary.
  • Excessive gear wear.
  • INSPECT all the axle gears for wear or damage. INSTALL new components as necessary.
  • Incorrect ring gear backlash.
  • 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.
  • Axle shaft broken
  • Overload the vehicle.
  • Misaligned axle shaft tube.
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