really awful
Crashes / Fires:
1 / 2
Injuries / Deaths:
0 / 0
Average Mileage:
50,546 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2011 Ford F-150 drivetrain problems

drivetrain problem

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2011 Ford F-150 Owner Comments (Page 9 of 11)

« Read the previous 20 complaints

problem #55

Sep 052013


  • 69,100 miles


While accelerating to 75mph or so, up slight hill from 65-70 mph went to pass a vehicle then truck lost vast majority of power even with all the way down and began to violently shake. Could have easily cause accident since wasn't abble to accelerate as planned to match speed of other lane. Check engine light came on. Truck continued to shake violently off and on for next mile before stopping. Problem is still ongoing under any moderate acceleration that goes over ~2000 RPM

- Lake Forest, CA, USA

problem #54

Jul 172013


  • 15,800 miles
On several occasions and more frequently as of lately, I am losing acceleration capability when I am trying to accelerate at any speed. When I try to accelerate from a stop or uphill, I feel like the engine won't go or is bogging down. To try and compensate, I try to accelerate more which only seems to make the problem worse. I have already taken it to the Ford dealer and they replaced a part on the transmission, but the problem still persists and is only get more frequent.

- Prescott, AZ, USA

problem #53

Aug 202013

F-150 6-cyl

  • 70,000 miles
When merging into I-75 traffic I pushed the gas to accelerate and the truck sputtered and missed, lost 90 percent of its power and went into limp mode. I was lucky I didn't get ran over. This truck has the 3.5 liter ecoboost engine. Unfortunately, this has happened before with no success getting it fixed. It is at the dealer now and I am having to pay to repair this well known defect.

- Soddy Daisy, TN, USA

problem #52

Mar 082013

F-150 6-cyl

  • 16,729 miles


Issue started again on 10 Aug. 2013. When under mild to heavy acceleration (such as merging onto interstates) the engine develops a significant miss and shudder. Vehicle was repaired once on 20 Mar. 2013 under tsb # 13-3-3. weather does not appear to be a factor. The "miss" was so severe with a K&N air charger high-flow intake kit installed that I had to reinstall the stock system. This was a none issue eventually because the Ford dealership would not place the vehicle on diagnostics until I had reinstalled the stock kit.

- Laurinburg, NC, USA

problem #51

Jan 202013

F-150 6-cyl

  • 40 miles
Well I have an issue with my trucks I have purchased from Ford. Well in August of 2011 I purchased the new F150 with ecoboost. The truck drove like a dream for a while then I started having issue, with the transmission, then engine losing power. This happen about 4 time during the life of the truck.the last time was in January 2013, it was the last straw for me. The reprogrammed the trans/computer and put a wind deflector in the front of the intercool. Still lost power on a road trip on the way back home from S Carolina. Mind you the truck was in the shop for tran/engine/the right fender had to be adjusted it was misaligned, the bed of the truck same thing. This lost of power almost caused me to have a accident because I was merging onto the highway. I also had to sunroof replaced as it was vibrating the whole truck when moving. The driver seat track was replaced and the sliding glass window in the back was replaced too. The defrost stopped then the window stopped sliding. I stopped driving the truck so I could get rid of it I have a 2013 limited and have some of the same issue. Now that I have a new 2013 vehicle I experience some of the same issue.

- Lithonia , GA, USA

problem #50

Aug 082013

F-150 6-cyl

  • 88,200 miles
Loss of significant power under slight to moderate acceleration, engine shutters violently, shakes and miss-fires. Check engine light flashes. Engine seems to run on 50% power loss, letting off accelerator for awhile then engine seems to recover temporarily until additional power is needed. Unable to have any confidence to pass any vehicles on grades. Quite possible for complete power loss under full acceleration as the engine misses so bad that it actually slows down and looses RPM's. I have owned this truck since new. Symptoms started in dry climate, no rain and have continued to get worse as I have entered into rainy areas with humidity.

- Scottsdale, AZ, USA

problem #49

Jul 282013

F-150 6-cyl

  • 24,650 miles


Second occurrence of the engine losing power while towing a camper over 100+ miles at highway speeds then adding power to climb a hill. Driving 65 mph on the highway, over a 1.5-2 hrs drive, approaching a hill while towing a camper, accelerated to climb the hill and the vehicle again, dropped from 65 to 40 mph in about 30 seconds. Engine stuttered and would not respond to throttle control to gain speed to climb the hill. Took vehicle into dealership no problem found, about a week later, there was an inefficient catalytic requiring the replacement of the left catalytic converter. This occurred post having the ecoboost fix that Ford Motor Company stated would resolve the problem and it is still occurring. Odbc 2 data logger captured the incident recording engine speed, engine RPM, and engine load (%).

- Rochester Hills, MI, USA

problem #48

Dec 092010

F-150 6-cyl

  • 15,000 miles
Misfire - shifting issues in transmission.

- Magalia, CA, USA

problem #47

Jul 152013

F-150 6-cyl

  • 35,000 miles
Ecoboost engine. Loud clattering on cold start. Runs very rough, exhibits propensity to stall when idling, and very sluggish acceleration coupled with transmission issues. Example 1: coasting on the freeway with traffic around 40mph, shifted lanes, then made attempt to accelerate and pass another vehicle, but the vehicle did not downshift. Accelerator will be down to the floor, and truck will remain stuck in a low gear (like 6th) and go nowhere...zero acceleration...after a few more tries, and a few seconds later, the transmission will slam into 2nd gear, shaking the entire truck. At this point, the turbos kick in and the truck takes off like a rocket. Creates 2 dangerous situations, a potential rear-end accident by the lane change without acceleration, and then the sudden, rapid, unpredictable acceleration of being randomly thrown into 2nd gear. Seen various other incidents like this in other scenarios and various gears. Accelerating out of a traffic circle, or out of a turn, is an easy way to see the problem. Truck has basically lost its ability to accelerate/downshift on demand. Example 2: stopped at a stop sign. When I then proceed into intersection...acceleration is very slow, then all of a sudden turbos kick in resulting in rapid unpredictable acceleration. Often times, the wheels will spin, and if the road is dry, the truck will bounce up and down all over the road! accelerator will in the same position the entire time. I have rapidly accelerated towards cars that I didn't want to get that close to. I now have to stay even further away from cars to maintain a safe distance due to unpredictable acceleration. Frustrating, because the problem is frequent now, but inconsistent. I have 2 kids in booster seats, and now I have to be especially careful when I drive with them in this truck because I feel it's unsafe.

- Macomb, MI, USA

problem #46

Jan 302012

F-150 6-cyl

  • 21,000 miles
I bought this vehicle 12/2011 with 19,800 miles on it (it was manf. 12/2010, sold in orlando, fl in 01/2011 and traded in 10/2011 and was used as a rental truck) as a certified pre-owned (cpo) from maroone Ford margate fl. There was a problem that when I was driving at a low speed <5mph the shift between 1-2 would sometimes be real hard (engine @ 3000rpm+) so this dealer checked and 'fixed' it with greasing the 2 part drive shaft. They told me that the wrong grease was used when the vehicle was built and needed to use a new grease. This happened again around the end of 2012(around 35K miles) and maroone Ford miami 'fixed' it again by greasing the drive shaft. Now it is happening again (8/2013) and this time they did not find anything wrong. It still happens and I am going to take my vehicle to a different dealership that is not maroone/autonation and see if they can 'fix' my problem. Also I am reading that now I am having problems with the drivers side lights rapid flashing but not the pass side or when the hazards are on so I googled and it seems that there are problems with the BCM (body control module) and that I have found is behind the drivers side rear seats on a super crew. The dealership (maroone/autonation) had not done anything to check if my vehicle was on a recall as far as I know and now I have to go to another dealership and also bring this up (and I doubt they would even know about it either). I was told by maroone/autonation that if anything is found to let them know. What" I have to pay to let their techs know their job" Ford should never have done a 2 piece driver shaft with a slip yoke or quit with things like the mechanical flasher relays even with pwm/canbus. This now becomes expensive to fix and not everyone is going to go out and buy a new vehicle. Next time will be a Toyota because they are driven in the deserts around the world, not Ford.

- Miami, FL, USA

problem #45

Jan 012012

F-150 6-cyl

  • 20,000 miles


Six months after I bought my truck I noticed a shuttering and hesitation while I was on the highway. The shuttering happens when I am cruising at 55-60 mph. More noticeably when the truck is climbing a slight incline on the road while lightly accelerating to maintain 60 mph. I had the dealer look at it 3 times in the last 2 years. The first time they reprogrammed the transmission and the computer. It did not solve the problem. Brought it back the second time and I went for a ride with the technician and he noticed the shuttering. He said there was no engine light and no codes to find out what the problem is. Finally the third time they said Ford is aware of the problem and there engineers are trying to find a solution. I also had problems with my transmission. I was slowing down to come to a stop and the transmission downshifted so hard I thought I got rear ended by the vehicle behind me.

- Hudson, NH, USA

problem #44

Jun 092013

F-150 6-cyl

  • 30,000 miles
The first time this happened, my husband was pulling out into a center turn lane in order to merge with traffic and the motor cut out and bogged down. Just four days later, I had the same experience where the motor completely cut out while I was going through a yield sign, slowing down, and then getting on the accelerator to increase speed. I counted between 3-5 seconds before the truck started accelerating again. This is very dangerous and had someone been right behind me it could've been a bad wreck. It happened to me this first time right after I picked my truck up from the dealership and them telling me my VIN didn't qualify for the tsb with replacing the cac (intercooler) and adding the air deflector plate. I have since gone to a second dealership and they are performing the tsb for me after having my truck for 5 days now, and being able to reproduce the problem easily. I hope this fixes it. I've already had a check engine light come on and my driver's side catalytic converter was replaced. I've had numerous leaks all under the 36,000 mile warranty - front main seal, transmission leak, rear diff leak, and even some deteriorating rubber gaskets in the doors, and am seriously questioning Ford's quality these days.

- Cedar Park, TX, USA

problem #43

Jan 082012

F-150 6-cyl

  • 1,947 miles
This truck has the 3.5 liter V6 ecoboost engine. The truck is company owned by wl hall co. I was accelerating while attempting to pass another vehicle. The vehicle lost power then started to shake, shudder and jerk. The check engine light came on and the vehicle's engine started to run very roughly. This happened again at approximately 9,700 miles, 28,000 miles and 60,000 miles. Ford has attempted to fix the issue three times. The truck will be going in for service for this issue a fourth time. Due to improper performance, this issue almost caused an accident this last time. There have also been numerous incidents over the life of the vehicle where it did not shift properly and dropped power, but then the vehicle corrected itself.

- Hopkins, MN, USA

problem #42

Jul 132013

F-150 4WD 6-cyl

  • 63,000 miles
After cruising at 50 mph for about 10 minutes, temperature of 87 degrees with high humidity, I attempted to pass the vehicle ahead of me. The truck accelerated nicely, then stumbled, stopped accelerating and started to shake violently. The check engine light began flashing, indicating a misfire. Problem corrected itself after 30 seconds and truck resumed normal operation.

- Palatine, IL, USA

problem #41

Jul 132013

F-150 6-cyl

  • 27,000 miles
Just purchased used Ford F150 supercrew with ecoboost engine with 26,000+ miles a week ago. I first noticed a shudder in the rear end when backing out of my driveway a couple days ago. Felt like driving over a washboard. Did not pay a lot of attention to it as I had not noticed it before. Went on 575 mile trip over the weekend and this shuddering persisted while pulling up to stops and starting out, both turning and going straight. Only occurs 65% of the time but the shuddering is very intense at low speed but appears to get better at cruising speeds. You can hear and feel the shuddering.

- Sioux Falls, SD, USA

problem #40

Jul 042013

F-150 6-cyl

  • 23,000 miles
Traveling on 4 lane highway during period of train, accelerated to pass vehicles, my truck eco-boost motor acceleration stagnated and vehicle began to shutter, was unable to pass, decelerated and stagnation stopped. Incident occurred when ever I tried to accelerated during active rain during a 9 hour interstate trip.

- Spring Lake, ND, USA

problem #39

Jul 042013


  • 43,000 miles
While merging into traffic on the expressway today in miami, at about 35 mph, I had to accelerate to get out of the merging lane, at which time (for the third time since I bought the truck in 2011) the truck lost all power to the engine (a 3.5L ecoboost) and began to sputter, shake, and decelerate. Luckily for myself and the other drivers on the road I did leave a sufficient gap between myself and the car to my rear to give that vehicle time to react to what equates to a vehicle pulling out in front of him/her and gently pressing the brakes without the brake lights engaging. My truck hovered between 25 and 30 mph for about 30 seconds with it doing the sputtering and slowing thing each time I attempted to accelerate during that time period. After pretty much coasting for 30 or so seconds, the truck sprang back to life and drove as advertised. From what I've read, this is not an isolated incident and I (as well as others) believe Ford should be held accountable for this defect. I'm not looking for a new truck, I'd just like the problem fixed. Even though no deaths or injuries have been reported due to this "yet", you can see the danger of having your engine loose power when you need it the most. Unfortunately for their customers, all Ford seems to be concerned with is the loss of a buck......not the loss of a life!!! [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Sunrise, FL, USA

problem #38

Jul 022012

F-150 6-cyl

  • 44,520 miles
I was traveling in the righthand lane of the East bound side of I24 around manchester, tn. My speed was approximately 65-70 mph. I suddenly came up upon slower traffic in the same lane and signaled to pass the slower traffic. As I looked in my mirrors for traffic behind me I noticed another vehicle closing on me in a hurry. I depressed the accelerator to gain speed and make the pass. The vehicle lurched and the motor suddenly shut down and wouldn't accelerate in the middle of my pass. The vehicle behind me locked their brakes and managed to slow their vehicle down before possibly colliding with me. I let the slower traffic on the right pass and signaled to get back in the right hand lane. This has happened twice to me and I think there is a real possibility this could endanger lives and property if not corrected. My 2011 Ford F-150 is equipped with the 3.5 liter ecoboost V6.

- Hillsboro, TN, USA

problem #37

Feb 152013

F-150 6-cyl

  • 39,000 miles
The contact owns a 2011 Ford F-150. The contact stated that while driving approximately 55 mph, the vehicle would no longer accelerate. The manufacturer was made aware of the failure. The vehicle was not repaired. The approximate failure mileage was 39,000.

- Chatsworth, GA, USA

problem #36

Mar 152013


  • 20,000 miles
The contact owns a 2011 Ford F-150. The contact stated when the vehicle was turned on the engine idled excessively and the began to smoke. The failure was experienced numerous times. The vehicle also stalled while driving approximately 20 mph. The contact was a able to drive onto the emergency lane and restart the vehicle; however, when the accelerator pedal was depressed the transmission disengaged and the rpms increased. The vehicle was taken to the dealer for diagnostic testing but they were unable to locate the failure. The dealer replaced the turbo charger line; yet, the failure was not corrected. The manufacturer was made aware of the failure. The failure mileage was 20,000. The current mileage was 23,800.

- Paris , TX, USA

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