Symptom Chart: Engine-Speed Related Vibrations

NOTE: When an engine-speed related vibration is present, engine, engine accessory and engine firing calculations should be carried out.

NOTE: Any assembly that is out of balance will only cause a first order vibration, it will not cause a higher order vibration.

NOTE: Some engine-speed related vibrations are normal though they should not be felt in the passenger compartment.

Vehicle-Speed Related Vibrations

Condition	Possible Sources	Actions
0.5 order engine vibration	Engine	REFER to Engine System - General Information , Symptom Chart: NVH.
First through sixth order engine vibration	Engine	REFER to Engine System - General Information , Symptom Chart: NVH.
	Transmission/transaxle	REFER to Automatic Transmission - 6F50/6F55 . REFER to Transfer Case - Power Transfer Unit (PTU) .
	Engine mounts	REFER to Engine System - General Information , Symptom Chart: NVH.
	Transmission/transaxle mounts	REFER to Automatic Transmission - 6F50/6F55 . REFER to Transfer Case - Power Transfer Unit (PTU) .
	Exhaust system	REFER to Exhaust System , Symptom Chart: NVH.
Belt driven accessory speed vibration	Engine pulley	REFER to Engine System - General Information , Symptom Chart: NVH.
	Coolant pump	REFER to Engine System - General Information , Symptom Chart: NVH.
	Generator	REFER to Charging System .
	A/C compressor	REFER to Climate Control - DATC , Symptom Chart: NVH.
	Accessory drive belt	REFER to Accessory Drive , Symptom Chart: FEAD.