Symptom Chart

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

SYMPTOM CHART - POWER TRANSFER UNIT (PTU)

Condition	Possible Sources	Action
The Power Transfer Unit (PTU) makes noise	Tire inflation pressure Tire and wheel size Fluid level Internal components	MAKE SURE all tires and wheels are the same size and brand and the inflation pressures are correct. FILL with the correct type and amount of lubricant. REFER to POWER TRANSFER UNIT (PTU) DRAINING AND FILLING . OPERATE the vehicle in all gears. If there is noise in the transaxle in NEUTRAL, or in some gears and not in others, REMOVE and REPAIR the transaxle. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION - 6F35 or AUTOMATIC TRANSMISSION - 6F50/6F55 for the procedure. If there is noise in all gears, INSTALL a new PTU. REFER to POWER TRANSFER UNIT (PTU) .
Leaking fluid from the PTU vent	PTU over filled	REFER to ANALYSIS OF LEAKAGE .
Leaking automatic transmission fluid	PTU intermediate shaft seal PTU compression seal	REFER to ANALYSIS OF LEAKAGE .
Leaking gear lubricant from the seals	The PTU vent is plugged (located on top of the PTU) Damaged seals	INSTALL a new PTU. REFER to POWER TRANSFER UNIT (PTU) . REFER to ANALYSIS OF LEAKAGE .
Vehicle has no or inadequate torque at rear wheels	Rear axle PTU mechanical failure	REFER to REAR DRIVE AXLE/DIFFERENTIAL . REFER to POWER TRANSFER UNIT (PTU) .
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	REFER to WHEELS AND TIRES . REFER to BRAKE SYSTEM - GENERAL INFORMATION . REFER to SUSPENSION SYSTEM - GENERAL INFORMATION . REFER to DRIVELINE SYSTEM - GENERAL INFORMATION . REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL . REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .