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Home >> Ford >> 2013 >> Flex SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Transfer Case - Power Transfer Unit) >> Diagnosis And Testing >> Power Transfer Unit (PTU) >> Symptom Chart
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Symptom Chart

WARNING: This page is about a different variant/trim than selected.

Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in SERVICE INFORMATION for information about these practices.

SYMPTOM CHART

Condition Possible Sources Action
  • The PTU makes noise
  • Tire inflation pressure
  • Tire and wheel size
  • MAKE SURE all tires and wheels are the same size and brand and the inflation pressures are correct.
  • Fluid level
  • Internal components
  • OPERATE the vehicle in all gears. If there is noise in the transmission in NEUTRAL, or in some gears and not in others, REMOVE and REPAIR the transmission. Refer to the appropriate Automatic Transmission for the procedure. If there is noise in all gears, INSTALL a new PTU. REFER to POWER TRANSFER UNIT (PTU) - 3.5L  or POWER TRANSFER UNIT (PTU) - 3.5L GTDI .
  • Leaking fluid from the PTU vent
  • PTU over filled
  • Leaking automatic transmission fluid
  • PTU intermediate shaft seal
  • PTU compression seal
  • Leaking gear lubricant from the seals
  • The PTU vent is plugged (located on top of the PTU)
  • Damaged seals
  • Vehicle has no or inadequate torque at rear wheels
  • Rear axle
  • PTU mechanical failure
  • Vehicle binds in a turn or resists turning/pulsates or shudders in a straight line
  • Wheels/tires
  • Brake system
  • Wheel bearings
  • Halfshafts
  • Wheel speed sensor(s)
  • ABS module