Symptom Chart - Electronically Controlled Continuously Variable Transmission (eCVT) Noise/Vibration

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) NOISE/VIBRATION

Condition	Possible Sources	Action
Rattle-occurs at idle or at light acceleration from a stop	Damaged engine or electronically controlled electronically controlled continuously variable transmission (eCVT) mounts	CHECK the powertrain/drivetrain mounts for damage. INSTALL new mounts as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
	A loose front exhaust pipe heat shield	REPAIR or INSTALL a new heat shield as necessary.
	Loose inspection plate or dust cover plate	CHECK for loose bolts. TIGHTEN to specifications. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
	Loose flexplate-to-converter nuts	CHECK for loose nuts. TIGHTEN to specifications. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
Whine-pitch increases with vehicle speed. Starts in first and second gear, decreases or goes away at higher gears	Damaged or worn low one-way clutch Damaged or worn intermediate one-way clutch Friction elements Damaged or worn planetary or sun gear	INSPECT the electronically controlled electronically controlled continuously variable transmission (eCVT) for wear or damage. REPAIR or INSTALL new components as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
Whine-the pitch changes with engine speed	A worn or damaged accessory drive component	CARRY OUT the Engine Accessory Test. REPAIR or INSTALL new components as necessary.
	Incorrect fluid level	CHECK that the electronically controlled continuously variable transmission (eCVT) is filled to the correct level. ADD fluid as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
	Partially blocked filter	INSPECT the filter. CLEAN or INSTALL a new filter as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
	Worn or damaged front pump	INSPECT the front pump. INSTALL a new front pump as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
Whine-pitch changes with vehicle speed	Speedometer cable or gears	REPAIR or INSTALL new cables or gears as necessary.
Whine/moan type noise-pitch increases or changes with vehicle speed	Damaged engine or electronically controlled eCVT mount	CHECK the powertrain/drivetrain mounts for damage. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
	U-joints worn or damaged	INSPECT the U-joints or CV joints for wear or damage. INSTALL new U-joints or CV joints as necessary. REFER to DRIVESHAFT .
	Damaged or worn differential ring and pinion	INSTALL a new rear axle. REFER to REAR DRIVE AXLE-DIFFERENTIAL .
	Planetary gears nicked or chipped	INSTALL a new electronically controlled continuously variable transmission (eCVT). REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
Whistle-noise is high pitched, constant. Changes in pitch with the throttle position	Hydraulic pressure in the main control	INSPECT the main control. REPAIR or INSTALL new components as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
	Incorrect band/clutch apply pressure	CARRY OUT the line pressure tests. REPAIR or INSTALL components as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
Clunk-occurs when shifting from park to a drive or reverse position	Damaged powertrain mounts	INSPECT the powertrain mounts for damage. INSTALL new mounts as necessary.
	Damaged or worn pinion bearings	CHECK for abnormal bearing play or roughness. INSTALL new bearings as necessary. REFER to REAR DRIVE AXLE-DIFFERENTIAL .
	Worn driveshaft constant velocity (CV) joint	INSPECT the CV joint. INSTALL a new driveshaft as necessary. REFER to REMOVAL AND INSTALLATION .
	Worn friction elements or excessive clutch pack end plate play	INSTALL a new electronically controlled continuously variable transmission (eCVT). REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .
Bump-occurs when shifting from park to a drive or reverse position. Similar to Clunk but with no sound	Initial gear engagement	Acceptable condition.
Buzz or hiss	Incorrect driveline angles	CHECK for correct driveline angles. REPAIR as necessary. REFER to DRIVELINE SYSTEM-GENERAL INFORMATION .
Vibration-a high frequency (20-80 Hz) that is felt through the seat or gear shifter. Changes with engine speed	Electronically controlled continuously variable transmission (eCVT) cooler lines grounded out	CHECK the eCVT cooler lines. REPAIR as necessary.
	Fluid filler tube grounded out	CHECK the fluid filler tube. REPAIR as necessary.
	Shift cable incorrectly routed, grounded out or loose	CHECK the shift cable. REPAIR as necessary. REFER to AUTOMATIC TRANSAXLE-TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (eCVT) .