Whine Sound from Under Vehicle

A whine sound may be heard coming from under the vehicle on some 2019-2020 Envision models equipped with the 2.0L 4-cylinder engine (RPO LTG) and the 9T60 automatic transmission (RPO M3T). The sound may be radiating from the driveline while at cruising speeds with light throttle input or while coasting at 30-60 mph (48-60 km/h). The sound may be found more prominent when the transmission is cold and slowly diminishes as the transmission warms up.

If this sound is heard, it may be caused by a drive chain internal to the 9-speed transmission. The sound radiates through the propeller shaft.

Replace the propeller shaft (Fig. 23) with a newly designed propeller shaft that has been released. The new propeller shaft has an integrated tuned vibration absorber designed to mitigate the whine sound.

Refer to two-piece propeller shaft replacement in the appropriate Service Information.

 

Fig. 23

 

Refer to #19-NA-166 for additional information and the part number.

 

– Thanks to Kris Villegas

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