2009 Mercury Grand Marquis Transmission and drivetrain Problems
- Complaints
- 2about this part
- Share
- 8%of 26 total for the year
- Median mileage
- 17,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the transmission and drivetrain of the 2009 Mercury Grand Marquis, 8% of the 26 complaints for this model year. Where a mileage was given, the median is 17,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I applied the brakes at around 20 miles per hour on january 25 and the motor accelerated for one or two seconds. I was able to stop the car by pressing the brakes much harder than normal. On january 26 I applied the brakes at around 60 miles per hour and the motor again accelerated for one or two seconds. I continued to press the brakes, the motor slowed down and the car eventually slowed. It sounded like pressing the accelerator down hard to pass another car on a two lane road.”
NHTSA complaint #10445617, filed 2012-01, 15,000 miles“My wife was driving around 25 MPH and less than one mile from our house. When she applied the brakes to stop at a stop sign the engine revved up. I was riding with her and observed the engine rev to around 2,500 RPM before slowing down. I also observed that her right foot was on the brake and that nothing was touching the accelerator. The cruise control had not been turned on. This was at least the fourth time this year that the engine revved up when the brakes were applied. The dealer could not find the problem and the engine did not rev while the dealer was testing the car.”
NHTSA complaint #10490380, filed 2012-12, 20,000 milesRelated service bulletins
- 10204997Mar 1, 20164R75E Transmission - Grinding/Whine/Vibration/Gear Slippage - Serrvice Kit available
- 10075262Mar 1, 20164R75E TRANSMISSION - GRINDING/WHINE/VIBRATION/GEAR SLIPPAGE - SERVICE KIT AVAILABLE ISSUE A service kit has been released to assist with proper repair of the 4R75E transmission…
- 10056701Aug 21, 2014Ford/lincoln/mercury: failure of planetary gear assembly is due to transmission, on certain vehicles, exhibiting grinding, gear slippage, whine type noise, vibration, while…
- 10056191May 1, 2014Ford/lincoln/mercury: the indicator may illuminate overdrive off and/or slipping in 3rd or no 4th gear, due to direct clutch failure and diagnostic trouble code (dtc) p0733…
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 2 | 8% |
| 2009 | 2 | 8% |
| 2008 | 3 | 4% |
| 2007 | 5 | 5% |
| 2006 | 4 | 3% |
| 2005 | 5 | 1% |
| 2004 | 9 | 3% |
| 2003 | 12 | 3% |
| 2002 | 1 | 1% |
| 2001 | 13 | 8% |
| 2000 | 6 | 4% |
| 1999 | 12 | 7% |
| 1998 | 8 | 6% |
| 1997 | 12 | 4% |
| 1996 | 15 | 6% |
| 1995 | 11 | 6% |
| 1994 | 18 | 12% |
| 1993 | 29 | 20% |
| 1992 | 29 | 11% |
| 1991 | 8 | 10% |
| 1990 | 6 | 11% |
| 1989 | 6 | 10% |
| 1988 | 4 | 5% |
| 1987 | 1 | 2% |
| 1986 | 1 | 5% |
| 1985 | 1 | 5% |
| 1983 | 3 | 43% |
Other parts of the 2009 Mercury Grand Marquis
6 complaintsSteering
5 complaintsElectrical system
4 complaintsVehicle speed control
4 complaintsFuel system
3 complaintsEngine
2 complaintsSuspension
2 complaintsTires
2 complaintsAir bags
1 complaintsExterior lighting
1 complaintsSeat belts
1 complaintsBody and structure
1 complaints
← All problems reported for the 2009 Mercury Grand Marquis
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology