2007 Chevrolet Impala 1LT (purchased Nov 2006)
3.6L V-6 Engine
32,000 miles (yes, low mileage)
Original owner. All book maintenance maintained on schedule.
Transmission fluid at proper level and still clear pinkish color.
Recent history: Several months ago was having major trouble shifting out of park gear due to torque lock. Mechanic unable to duplicate problem at shop so lubricated linkages which greatly lessened but has not cured torque lock problems.
Power train warranty expires 2 months.
Has developed loud whine similiar to how power steering low on fluid sounds but is NOT the steering whining.
No whine if foot off gas, even if turning the steering wheel hard, so am sure it is not the power steering that is whining.
Whine is heard ONLY when gas pedal is depressed and especially loud when car is in low gear starting up from a stop or when accelerating uphill. If I take my foot off the gas pedal and coast, the whine stops.
Pitch and loudness of whine goes up when engine RPMs go higher; pitch and loudness go down when RPMs go down.
No change in average gas mileage, no stalling, no hesitation such as gas feed might produce.
Transmission is doing very slightly more “hunting” for gear than normal when going uphill in slow city traffic, although has always tended to have this problem.
Plan to take the car to mechanic soon as they have an appointment opening. Was planning to have regular transmission service with change the tranny fluid and filter soon anyway, although book doesn’t call for it until 50,000 miles. But since the car is 5 years old and gets mostly short trip stop and go driving think it best to do tranny service early, especially with the warranty about to expire.
Any ideas if this really is the transmission whining or other possible cause of the whine?
…still reading, still learning…