Symptom Chart - NVH

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: NVH symptoms should be identified using the diagnostic tools that are available. For a list of these tools, an explanation of their uses and a glossary of common terms, refer to NOISE, VIBRATION & HARSHNESS . Since it is possible any one of multiple systems may be the cause of a symptom, it may be necessary to use a process of elimination type of diagnostic approach to pinpoint the responsible system. If this is not the causal system for the symptom, refer to NOISE, VIBRATION & HARSHNESS for the next likely system and continue diagnosis.

SYMPTOM CHART - NVH

Condition	Possible Sources	Action
Rattle - occurs at idle or at light acceleration from a stop	Damaged Electronically Controlled Continuously Variable Transmission (eCVT) insulators	CHECK the transmission insulators for damage. INSTALL new insulators as necessary. REFER to TRANSAXLE SUPPORT INSULATOR - UPPER , TRANSAXLE SUPPORT INSULATOR - LOWER or TRANSAXLE SUPPORT INSULATOR - REAR .
	Loose or damaged transaxle NVH shield	CHECK the transaxle NVH shield for loose fasteners or damage. REFER to NVH SHIELD .
	Loose inspection plate or dust cover plate	CHECK for loose bolts. TIGHTEN to specifications.
	Loose flexplate-to-converter nuts	CHECK for loose nuts. TIGHTEN to specifications.
Whine - pitch increases with vehicle speed	Damaged or worn planetary or sun gear	INSPECT the eCVT for wear or damage. DRAIN and FILTER the eCVT fluid. INSPECT for metal debris and CHECK fluid condition. If excessive metal debris is present, INSTALL a new transaxle as necessary. REFER to TRANSAXLE .
Whine - the pitch changes with engine speed	Incorrect transmission fluid level	CHECK that the eCVT is filled to the correct level. ADD transmission fluid as necessary.
Clunk - occurs when shifting from PARK to a DRIVE or REVERSE position	Damaged transmission insulators	INSPECT the transmission insulators for damage. INSTALL new insulators as necessary. REFER to TRANSAXLE SUPPORT INSULATOR - UPPER , TRANSAXLE SUPPORT INSULATOR - LOWER or TRANSAXLE SUPPORT INSULATOR - REAR .
Bump - occurs when shifting from park to a drive or reverse position. Similar to Clunk but with no sound	Initial gear engagement	Acceptable condition.
Vibration - a high frequency (20-80 Hz) that is felt through the seat or selector lever. Changes with engine speed	Selector lever cable incorrectly routed, grounded out or loose	CHECK the selector lever cable. REPAIR as necessary. REFER to DIAGNOSIS AND TESTING .