On multiple occasions starting in jan 2011, the vehicle would hesitate to select a gear and accelerate while trying to leave a stop light or sign, or after making a turn leaving a few second lull where the vehicle is unresponsive. The previous transmission software re-flash was performed again even though dealer was unable to replicate problem. Issue still persists occasionally, as well as a new symptom since march (23,000 miles). Now, sometimes when coming to a stop the vehicle will stall as though the transmission did not downshift to a lower gear. Placing the vehicle in neutral and restarting allows continued operation. These issues combined with inconsistency in shifting performance as noted by many others lead me to believe there is still a component and/or software problem with this 6f35 transmission. However, since the problem cannot be consistently replicated by the dealer they are unsure of a remedy.
2009 Mercury Mariner transmission complaints
Page 3 of 3: complaints 41 to 44 of 44, newest first, as owners wrote them.
2009 mercury mariner. The rear end of the vehicle makes a squealing noise upon acceleration I took the car back to the ford dealership in hillsdale. The vehicle was in the shop 12/9/2009 through 12/16/2009. Unable to fix the noise, ford motor company had them tear down the transmission and replace the drive chain. When I picked up the car I was told that the noise was still there and that ford engineering said it should not be a problem. The noise was still consistent and has grown increasingly louder. Since this initial complaint I have received a recall notice for the transmission solenoid regulator valve. The vehicle has been accelerating when it shouldn't and not accelerating when it should, like when merging into traffic when the transmission would not perform properly.
Vehicle is a 2009 mercury mariner premium (fwd, ivct 2.5 l i4 dohc, 16 valve, gasoline, automatic transmission [6f midrange], pfi). On 01/10/2010 the throttle body/powertrain indicator icon and service engine soon icon displayed solid illumination after engine warmup. On 01/14/2010, the dealership read the ombd-ii malfunction codes and notified owner that the entire automatic transmission assembly (ford part no. 7000) needed to be replaced. At ford parts web site, it states that this part is recalled, but no further information is provided; however, this part was received by the dealership and is being installed.
Tl*the contact owns a 2009 mercury mariner. While driving approximately 65 to 70 MPH on normal road conditions; the transmission slipped with excessive vibration. The engine began to rev and the RPM's were high. Suddenly, pressure was applied to the accelerator pedal, however, the response was minimal. The contact was able to drive onto the emergency lane and resume normal operation. An authorized dealer confirmed that the failure was contributed to the transmission over drive piston. The vehicle was repaired. The failures occurred whenever 5th and 6th gear were engaged. The identical failures occurred on two separate occasions after the service repairs were performed on the vehicle. In addition, the vehicle rolled while stationary on an incline. The contact had concerns of the safety risk involved. The failure and current mileages were 13,088.
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