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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 130 (Four-Wheel Drive Systems (ESOF) - F250-F550 Super Duty) >> Diagnosis And Testing >> Four-Wheel Drive Systems - Mechanical Shift >> Symptom Chart - Mechanical Shift

Symptom Chart - Mechanical Shift

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART - MECHANICAL SHIFT

Condition Possible Sources Action
  • Transfer case makes noise
  • Tire or wheel size.
  • VERIFY all tires and wheels are the same size and tire pressure is correct.
 
  • Excessive tire tread wear.
  • CHECK tire tread wear to see if there is more than 0.15 cm (0.06 inch) difference in tread wear between front and rear. EXCHANGE one front and one rear wheel. INFLATE tires to correct specifications.
 
  • Internal components.
  • CYCLE the transmission through all gear positions with the transfer case in 2WD and 4x4. If there is noise in the NEUTRAL position or in some gears but not others, DIAGNOSE the transmission. If there is noise in all transmission gear positions, OPERATE the transfer case in all positions. If the noise is only present in 4x4, during acceleration, deceleration and float, DISASSEMBLE the transfer case; REFER to TRANSFER CASE . CHECK the internal components for damage. REPAIR as necessary. If the noise is only present in 4x4 LOW, INSPECT the planet gears and range sleeve for damage. REPAIR as necessary.
  • Transfer case jumps out of gear
  • Shift linkage.
 
  • Front and rear driveshaft slip yokes.
  • LUBRICATE and REPAIR the slip yoke as necessary.
 
  • Internal components.
  • REPAIR the transfer case as necessary, REFER to TRANSFER CASE .
  • Excessive driveline/torsional wind-up during straight-line operation
  • Tire and wheel size mismatched.
  • VERIFY all tires and wheels are a matching size and that inflation pressures are correct.
 
  • Mismatched axle ratios.
  • VERIFY front and rear axle ratios are the same.
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