Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
The Power Transfer Unit (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	FILL with the correct type and amount of lubricant. REFER to POWER TRANSFER UNIT (PTU) DRAINING AND FILLING .
	Internal components	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 - 6F50/6F55 . If there is noise in all gears, INSTALL a new PTU. REFER to POWER TRANSFER UNIT (PTU) - 3.7L or POWER TRANSFER UNIT (PTU) - 3.5L GTDI .
Leaking fluid from the PTU vent	PTU overfilled	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)	INSTALL a new REFER to POWER TRANSFER UNIT (PTU) - 3.7L or POWER TRANSFER UNIT (PTU) - 3.5L GTDI .
Leaking gear lubricant from the seals	Damaged seals	REFER to ANALYSIS OF LEAKAGE .
Vehicle has no or inadequate torque at rear wheels	Rear axle	REFER to REAR DRIVE AXLE/DIFFERENTIAL .
Vehicle has no or inadequate torque at rear wheels	PTU mechanical failure	REFER to REFER to POWER TRANSFER UNIT (PTU) - 3.7L or POWER TRANSFER UNIT (PTU) - 3.5L GTDI .
Vehicle binds in a turn or resists turning/pulsates or shudders in a straight line	Wheels/tires	REFER to WHEELS AND TIRES .
	Brake system	REFER to BRAKE SYSTEM - GENERAL INFORMATION .
	Wheel bearings	REFER to SUSPENSION SYSTEM - GENERAL INFORMATION .
	Halfshafts	REFER to DRIVELINE SYSTEM - GENERAL INFORMATION .
	Wheel speed sensor(s)	REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .
	ABS module	REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .