NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
39 reportsClear category filter8,000 miles · Dec 26, 2011
Power TrainVehicle Speed ControlWheels
MY 2006 MERCURY MOUNTAINEER HAS INTERMITTENTLY JOLTED OR LURCHED FORWARD WHEN STOPPING FOR LIGHTS AND STOP SIGNS AFTER SPEEDS OVER 30 MPH. HASN'T GOTTEN AWAY FROM ME BUT FEELS AS IF I AM GOING TO HIT SOMETHING OR SOMEONE AHEAD OF ME. EXTREMELY SCARY WHEN PEOPLE ARE IN CROSS WALK. I TOOK MY CAR TO THE FORD DEALER SHORTLY AFTER…
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MY 2006 MERCURY MOUNTAINEER HAS INTERMITTENTLY JOLTED OR LURCHED FORWARD WHEN STOPPING FOR LIGHTS AND STOP SIGNS AFTER SPEEDS OVER 30 MPH. HASN'T GOTTEN AWAY FROM ME BUT FEELS AS IF I AM GOING TO HIT SOMETHING OR SOMEONE AHEAD OF ME. EXTREMELY SCARY WHEN PEOPLE ARE IN CROSS WALK. I TOOK MY CAR TO THE FORD DEALER SHORTLY AFTER BUYING IT USED. THE DEALER CHECKED IT OUT AND DENIED IT WAS HAPPENING. THAT WAS YEARS AGO AND TONIGHT I SAW NUMEROUS COMPLAINTS ON ANOTHER WEBSITE ABOUT THIS PROBLEM. WAS LOOKING BECAUSE NOW I AM GETTING A GRINDING NOISE FROM MY WHEELS WHICH PERSISTS AFTER A BRAKE JOB THAT DIDN'T FIX IT AS I THOUGHT. BOTH PROBLEMS ARE SEPARATE BUT I SEE A PATTERN OF THEM ON THIS VEHICLE NOW. *TR
NHTSA ODI #10441264
60,500 miles · Oct 8, 2011
Power Train
I PURCHASED THE 2006 MERCURY MOUNTAINEER IN JULY 2011. WHEN I WENT TO TAKE THE KIDS ON VACATION THE CAR HESITATED AND STOPPED ON THE HIGHWAY THEN FELT LIKE WE WERE REAR ENDED, VERY DANGEROUS WITH THE HESITATION ON ACCELERATION ALMOST CRASHED. CALLED THE PLACE I PURCHASED THEY HAVE NOW REPLACED THE TORQUE CONVERTER AND RESET THE …
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I PURCHASED THE 2006 MERCURY MOUNTAINEER IN JULY 2011. WHEN I WENT TO TAKE THE KIDS ON VACATION THE CAR HESITATED AND STOPPED ON THE HIGHWAY THEN FELT LIKE WE WERE REAR ENDED, VERY DANGEROUS WITH THE HESITATION ON ACCELERATION ALMOST CRASHED. CALLED THE PLACE I PURCHASED THEY HAVE NOW REPLACED THE TORQUE CONVERTER AND RESET THE TCM THE VEHICLE IS EVEN WORSE AND THEY ALSO HAVE HAD IT FOR 34 DAYS ON AND OFF. CALLED FORD THEY SAID THEY HAVE NO PROGRAM TO FIX AND WILL NOT REPLACE THE TRANSMISSION WHICH NEEDS TO BE REPLACED. THE DEALER REPORTS WITHOUT A BAD CODE EVEN THOUGH THEY KNOW THE VEHICLE IS HAZARDOUS THEY CANNOT FIND THE PROBLEM TO FIX, I SAID PLEASE JUST REPLACE THE TRANSMISSION AND UNFORTUNATELY TO NO AVAIL I HAVE PURCHASED A $18,000 HAZARD THAT I ONLY WAS ABLE TO DRIVE FOR 30 DAYS, TRADED MY OTHER VEHICLE AND GAVE THEM $1600 CASH FOR DOWNPAYMENT I JUST WANT MY VEHICLE FIXED.... *TR
NHTSA ODI #10429154
53,000 miles · Oct 4, 2011
Engine And Engine CoolingPower Train
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 50 MPH, THE RADIATOR STARTED TO OVERHEAT. THE DRIVER WAS ABLE TO CONTINUE DRIVING AND ADDED WATER TO THE RADIATOR. THE VEHICLE WAS NOT INSPECTED BY A DEALER NOR REPAIRED. THE MANUFACTURER WAS CONTACTED AND THEY ADVISED HIM THAT T…
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 50 MPH, THE RADIATOR STARTED TO OVERHEAT. THE DRIVER WAS ABLE TO CONTINUE DRIVING AND ADDED WATER TO THE RADIATOR. THE VEHICLE WAS NOT INSPECTED BY A DEALER NOR REPAIRED. THE MANUFACTURER WAS CONTACTED AND THEY ADVISED HIM THAT THE FAILURE WAS CAUSED BY NORMAL WEAR AND TEAR. IN ADDITION, HE NOTICED THAT WHEN SHIFTING FROM PARK TO REVERSE, THE VEHICLE WOULD HESITATE AND JERK VIOLENTLY INTO THE CORRECT GEAR. THE FAILURE MILEAGE WAS APPROXIMATELY 53,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10428441
52,000 miles · Jul 12, 2011
Power Train
TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THE VEHICLE WOULD LUNGE BACKWARDS WHEN DRIVING IN REVERSE. THE VEHICLE WAS TAKEN TO THE DEALER BUT THE DEALER WAS UNABLE TO DIAGNOSE THE CAUSE OF FAILURE. THE MANUFACTURER WAS NOT NOTIFIED OF THE ISSUE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAG…
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TL* THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT THE VEHICLE WOULD LUNGE BACKWARDS WHEN DRIVING IN REVERSE. THE VEHICLE WAS TAKEN TO THE DEALER BUT THE DEALER WAS UNABLE TO DIAGNOSE THE CAUSE OF FAILURE. THE MANUFACTURER WAS NOT NOTIFIED OF THE ISSUE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 52,000 AND THE CURRENT MILEAGE WAS 55,000.
NHTSA ODI #10411970
62,000 miles · Jan 5, 2011
Power Train
TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHEN THE GEAR WAS SHIFTED FROM DRIVE TO PARK THE VEHICLE DID NOT MOVE. SHE TOOK THE VEHICLE TO THE DEALER WHO STATED THAT THE SHIFT SOLENOID NEEDED TO BE REPLACED AND THE TRANSMISSION FLUSHED. THE DEALER PERFORMED THE REPAIRS AND THE FOLLOWING DAY THE VEHI…
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TL*THE CONTACT OWNS A 2006 MERCURY MOUNTAINEER. THE CONTACT STATED THAT WHEN THE GEAR WAS SHIFTED FROM DRIVE TO PARK THE VEHICLE DID NOT MOVE. SHE TOOK THE VEHICLE TO THE DEALER WHO STATED THAT THE SHIFT SOLENOID NEEDED TO BE REPLACED AND THE TRANSMISSION FLUSHED. THE DEALER PERFORMED THE REPAIRS AND THE FOLLOWING DAY THE VEHICLE BEGAN TO EXPERIENCE THE SAME FAILURE. THE VEHICLE ALSO MADE A LOUD THUMPING NOISE WHILE SHIFTING INTO REVERSE. THE CONTACT TOOK THE VEHICLE BACK TO THE DEALER AND WAS WAITING FOR THEM TO COMPLETE THE DIAGNOSTIC TEST. THE WAS CONCERNED SINCE THE FAILURE WAS A MAJOR SAFETY ISSUE THAT NEEDED TO BE ADDRESSED. THE FAILURE MILEAGE WAS 62,000.
NHTSA ODI #10374827
62,000 miles · Jan 5, 2011
Power Train
MY CAR IS 2006 MERCURY MOUNTAINEER IN 2007 ALREADY THE SHIFT HAD TO BE REPLACED AS IT CONTINUALLY GOT STUCK. ONE DEALER TOLD ME THE SHIFT NEEDED TO CHANGED YET AGAIN AND NOW WHEN THE CAR IS TAKEN OUT OF PARK INTO ANY GEAR IT WONT MOVE IT TAKES ABOUT 25 MINS TO ACTUALLY PUT INTO GEAR. THE DEALER SAID IT WAS A SHIFT SOLENOID I HA…
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MY CAR IS 2006 MERCURY MOUNTAINEER IN 2007 ALREADY THE SHIFT HAD TO BE REPLACED AS IT CONTINUALLY GOT STUCK. ONE DEALER TOLD ME THE SHIFT NEEDED TO CHANGED YET AGAIN AND NOW WHEN THE CAR IS TAKEN OUT OF PARK INTO ANY GEAR IT WONT MOVE IT TAKES ABOUT 25 MINS TO ACTUALLY PUT INTO GEAR. THE DEALER SAID IT WAS A SHIFT SOLENOID I HAD IT REPLACED A TRANSMISSION FLUSH AND REPROGRAM AND STILL THE SAME PROBLEM THE CAR ONLY HAS 62,000 MILES. *TR
NHTSA ODI #10374817
43,500 miles · Jul 13, 2010
Power Train
2006 MERCURY MOUNTAINEER V8 AWD--WHEN SHIFTING FROM PARK TO DRIVE OR REVERSE IT "CLUNKS" HARD INTO GEAR. THE WRENCH SYMBOL AND THE ENGINE SYMBOL LIGHT UP. THE VEHICLE ALSO DRIVES HARD AS IF IT ISN'T CHANGING GEARS. THE DEALERSHIP WILL ONLY SAY THAT THE FORD TSB RECOMMENDS REPLACING THE TRANSMISSION FLUID AND FILTER, THEN RESEALI…
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2006 MERCURY MOUNTAINEER V8 AWD--WHEN SHIFTING FROM PARK TO DRIVE OR REVERSE IT "CLUNKS" HARD INTO GEAR. THE WRENCH SYMBOL AND THE ENGINE SYMBOL LIGHT UP. THE VEHICLE ALSO DRIVES HARD AS IF IT ISN'T CHANGING GEARS. THE DEALERSHIP WILL ONLY SAY THAT THE FORD TSB RECOMMENDS REPLACING THE TRANSMISSION FLUID AND FILTER, THEN RESEALING WITH FOAM SEAL FIRST BUT REFUSES TO GIVE ME AN ACTUAL DIAGNOSIS OF WHAT IS GOING ON WITH THE CAR. THEY CAN NOT TELL ME THE REAL PROBLEM AND INSIST THAT WE WILL HAVE TO WORK THROUGH THE VARIOUS STEPS ON THE FORD TSBS WHICH MAY OR MAY NOT WORK (BY THEIR OWN ADMISSION) AND THE COST OF FINAL REPAIRS IS COMPLETELY OPEN ENDED. WHEN I QUESTIONED WHAT WE WOULD TRY NEXT AFTER THE TRANSMISSION FLUID/FILTER REPLACEMENT (BECAUSE I WAS SKEPTICAL ABOUT THIS CAUSING THE ISSUE ON A VEHICLE WITH ONLY 43,000 MILES) THEY HAD NO ANSWERS AT ALL. WE HAVE OWNED THIS VEHICLE LESS THAN A YEAR. AN INTERNET SEARCH REVEALS THAT THIS IS A MAJOR ONGOING PROBLEM WITH THIS MODEL BUT FORD REFUSES TO OWN UP TO IT. THERE NEEDS TO BE A RECALL. *TR
NHTSA ODI #10343036
56,000 miles · Jul 9, 2010
Power Train
2006 MERCURY MOUNTAINEER SHIFTS HARD WHEN GOING INTO REVERSE, AND IS ALSO STARTING TO SHIFT HARD FROM 2ND TO 3RD GEAR. HAVE HEARD FROM MANY THERE PEOPLE WITH 2006 FORD EXPLORERS THAT THERE IS A MANUFACTURER DEFECT IN THE TRANSMISSION. HAVE HAD CHIP REPROGRAMMED AT DEALERSHIP (WAS CHARGED) AND ALSO HAD TRANSMISSION FLUSHED AN…
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2006 MERCURY MOUNTAINEER SHIFTS HARD WHEN GOING INTO REVERSE, AND IS ALSO STARTING TO SHIFT HARD FROM 2ND TO 3RD GEAR. HAVE HEARD FROM MANY THERE PEOPLE WITH 2006 FORD EXPLORERS THAT THERE IS A MANUFACTURER DEFECT IN THE TRANSMISSION. HAVE HAD CHIP REPROGRAMMED AT DEALERSHIP (WAS CHARGED) AND ALSO HAD TRANSMISSION FLUSHED AND IT IS ACTUALLY WORSE NOW. MY MOUNTAINEER HAS 58,000 MILES ON THIS AND HAS BEEN DOING THIS FOR THE PAST 2,000 MILES. FORD SHOULD FIX THIS ISSUE. *TR
NHTSA ODI #10342351
115,584 miles · Nov 15, 2009
Power Train
MY TRUCK HAS 115,000 MILES ON IT, TRANSMISSION IS NOW GONE. WHEN I PUT IT IN REVERSE IT WOULD JERK BACK LIKE THE IT WAS BEING HIT, ALL OF SUDDEN IT STARTED DRAGGING WHILE DRIVING, AND HAVING PROBLEMS SHIFTING INTO GEAR, AND NOW ITS TOTALLY GONE...ONLY HAD THE VEHICLE TWO YEARS. *TR
NHTSA ODI #10292241
Mileage unknown · Nov 9, 2009
Power Train
V8 MOUNTAINEER JOLTS WHEN YOU COME TO STOP, FEELS LIKE IT HAS BEEN REAR ENDED, NO ACCIDENTS AT THIS POINT, BUT THERE HAS BEEN A FEW CLOSE CALLS. *TR
NHTSA ODI #10291598