2020 Ford F-150: sudden loss of power

Filed Nov 2, 2026 · Transmission · FL

It will lose all power sometimes during 1-2 or 1-3 shift and not complete the shift causing you to be powerless in front of oncoming traffic while turning left on green across traffic. Then eventually slams into gear violently. This last time was not the first but two of my kids were in the truck this time. I have not had it to the dealer yet but after much research online this is a known problem and I have a pretty good idea of what they’re going to tell me. No check engine light.

Filed Nov 2, 2026 · Transmission · OR

I am reporting a safety-related transmission problem I experienced with my 2020 Ford F-150 equipped with the 10R80 automatic transmission. While driving normally, the transmission suddenly lost power engine revved up and started to buck . This occurred while I was going down the coastal range pass while towing my boat, creating a potentially dangerous situation because the truck did not respond as expected when I needed predictable acceleration or propulsion. I believe this incident may be related to the known 10R80 CDF clutch-cylinder/sleeve problem. Ford technical information identifies axial movement of the CDF sleeve that can cause hydraulic-circuit leaks and harsh or delayed engagement and shifting. This condition can result in slipping, RPM flares, delayed engagement, unexpected gear changes, harsh downshifts, lurching, or loss of propulsion. This is a safety concern, not merely a transmission quality or reliability issue. Unexpected loss of propulsion or unpredictable shifting while merging, accelerating into traffic, crossing an intersection, turning, or traveling at highway speed can create a collision hazard. Because I personally experienced this unexpected transmission event, I request that the federal safety agency investigate the 10R80 CDF clutch-cylinder/sleeve condition in Ford F-150s. Please review Ford warranty claims, dealer repair records, transmission replacements, consumer complaints, and field-failure data to determine whether this is a safety defect requiring a recall. I believe owners should not have to wait for a potentially dangerous transmission failure before this known condition is addressed. Thank you for your consideration.

Filed Oct 21, 2026 · Transmission · NJ

while driving on the highway, my 2020 Ford F-150 equipped with the 10R80 transmission experienced a sudden and catastrophic loss of power. The transmission failed to shift slipped gears, and left the vehicle completely neutralized in traffic. This sudden loss of propulsion created an extremely hazardous situation on the road, nearly causing a severe collision before I could safely pull over.

Filed Oct 7, 2026 · Transmission · MN

I am writing to formally report a severe and dangerous safety defect regarding the 10R80 10-speed automatic transmission in my 2020 Ford F-150. While driving, the vehicle routinely experiences a complete "neutral-out" or severe shift flare when attempting to transition out of 1st gear. Instead of engaging 2nd or 3rd gear, the transmission completely drops out of gear into a false neutral. During this failure, the vehicle experiences an immediate and total loss of forward propulsion for several seconds while the engine revs freely. After a dangerous delay, the transmission violently slams back into gear. This is an acute safety hazard. Losing all forward acceleration unexpectedly—specifically when pulling out from a complete stop, navigating intersections, or merging into fast-moving traffic—leaves the vehicle stranded and completely defenseless against oncoming traffic. It creates an immediate risk of a severe rear-end or broadside collision, as trailing drivers do not expect a vehicle to suddenly lose all power. Ford is fully aware of this mechanical defect, as documented in their internal Technical Service Bulletin TSB 25-2126 (and its predecessors). The bulletin notes that an internal CDF clutch drum bushing physically slips out of place, blocking hydraulic fluid passages and starving the transmission of pressure. Because this is a known factory engineering defect that causes an unpredictable loss of propulsion in active traffic, it should be treated as a critical safety hazard rather than a standard wear-and-tear component. I urge the federal safety agency to investigate this systemic 10R80 CDF drum failure to protect consumers from catastrophic accidents.

Filed Sep 8, 2026 · Engine · PA

My 2020 Ford F-150 (5.0L V8) experienced a sudden loss of engine power and stalled completely while I was driving. In the days leading up to this, the check engine light had illuminated, and I later discovered the vehicle had consumed a severe amount of engine oil — the dipstick read below the "add" line. Critically, no low oil pressure warning light or audible chime alerted me to the oil loss before the stall occurred. After the initial stall, the engine continued to struggle to maintain idle and stalled repeatedly whenever RPM dropped to approximately 1,000, making the vehicle unsafe to drive. I had the vehicle towed to a Ford dealership for diagnosis. The dealership's estimate confirmed the need for a full engine (long block) replacement, at a cost of approximately $19,824.56 (total estimate $21,491.04). I am aware that Ford issued Technical Service Bulletin 19-2365, which acknowledges that 2018-2020 F-150 trucks with the 5.0L engine may experience excessive oil consumption exceeding one quart per 3,000 miles with no visible external leaks, attributed to oil being drawn into the engine during deceleration fuel shut-off events. I believe this defect directly caused my vehicle's stalling and oil starvation, and that the lack of any dashboard warning prior to the failure is a separate and significant safety concern, since a driver has no way to know the engine is being damaged or that a stall is imminent.

Filed Aug 7, 2026 · Transmission · CA

Our 2020 Ford F150 transmission failed at 80k miles. Ford USA offered to pay half of the repair cost but is not willing to take full accountability on a transmission that was never was put under stress. Our truck never towed anything and was only use to drive from the shop to the job site and with only 1 up to 2 passenger only max. Per google research: The 2020 Ford F-150, equipped with the 10R80 10-speed automatic transmission, commonly experiences harsh, erratic, or delayed shifting, sudden jerking or lunging between gears, and gear slippage. These issues stem from software calibration flaws in the adaptive learning system or mechanical wear on internal components. Common Symptoms and Issues Rough Shifting: Hard, delayed, or clunking engagement when shifting between lower gears, especially on cold starts. Lunging or Hesitation: Sudden forward surges or hesitation when trying to accelerate from a rolling stop. Gear Slippage: Temporary loss of power delivery or failure to catch the next proper gear cleanly. Shift Cable Clip Recall: A limited recall addressed a faulty shift cable lock clip where the gear indicator might show a different gear than what was actually selected, increasing rollaway risks

Filed Aug 7, 2026 · Transmission · 90,000 miles · IN

The contact owns a 2020 Ford F-150. The contact stated that the message on “Powertrain Malfunction – Reduced Engine Power” was displayed on the Ford App. After the message was displayed, while driving at an undisclosed speed, the vehicle failed to exceed 30 MPH. A certified mechanic was contacted and stated that the failure was associated with the transmission. The vehicle was repaired. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 90,000.

Filed Apr 12, 2026 · Transmission · NY

My family and I were merging onto the highway when without warning, the automatic transmission bucked, making a loud thump sound, then it lost power nearly causing a severe accident. The transmission then began to hunt for gears, seemingly confused. It even cycled through 1st gear, my heart dropped, but luckily it did not engage 1st gear since that would have caused havoc at highway speeds. Afterwards, the vehicle regained some power but was suddenly limited to only two gears (5th and 9th). I immediately drove home, when entering my driveway the transmission could not engage reverse. Therefore I had to roll it in using forward momentum. I just had the vehicle serviced a few days ago because this issue happened before (not as severe). However, I was told the vehicle was operating fine and a leaky transmission pan was the culprit. After the transmission pan was replaced, I picked up the vehicle just yesterday (4/11/26), and this incident occurred today,(4/12/26). Please help, this transmission was rebuilt by Ford under warranty (60k mile powertrain warranty) just two years ago due to the notorious defects that have been ongoing. I contacted Ford corporate but they've refused to provide any help. This problem was confirmed by Ford corporate and the dealer, which led to the initial transmission rebuild (in 2024). However I fear this defect may not be repairable since the issue has returned and is more severe. I believe Ford was aware of this defect and did not disclose this information to me prior to buying. If I had known, I wouldn't have purchased this vehicle. Thank you for any support you could provide on this matter.

Filed Mar 4, 2026 · Transmission · MO

Although my VIN was not listed on any data base as a risk of the 10-speed transmission issue, my transmission first faltered while driving on the highway on 26 November 2024 and then again on 9 December 2024. While driving, the transmission instantly downshifted to a lower gear and there was a loss of power, which was a huge safety issue while driving on I-44 at 70 mph. Ford was notified of both instances via phone call from me and through the Ford App that is linked to my truck. In both occasions, the "Engine" light on the dashboard was illuminated. *Please note that Ford did assist in repairing this issue through the Customer Satisfaction Program.* Although I was still responsible to pay for 55% of the repair amount (total of $6,608.82), Ford paid the remaining 45% and added an Extended Warranty to the truck for 36,000 miles / 36 months. A new transmission was installed on 18 December 2024. My reason for filing this is to add to the data that is being collected with regards to this specific issue. Yes, Ford may assist on a case-by-case basis, but this is still unfortunately being viewed as a "Service Bulletin" instead of a Recall.

Filed Feb 8, 2026 · Transmission · PA

Vehicle was purchased certified pre-owned from dealer at around 35k miles. Currently around 65k miles. Complete loss of power at 45 miles an hour. Truck shifted from 7th gear to 1st in a split second and brought the truck to a complete stop. Luckily able to pull onto shoulder to avoid getting rear ended from car behind. Decent maintenance records with dealer, no prior issues with transmission other than some rough shifting before this issue. Vehicle was dropped at dealer on 2-5-26, have not received any type of feedback or updated since dated 2-8-26. I know there is a current TSB on these transmissions, I believe they are defective based on other reports and my personal experience. Complete safety danger, 45 to 0 in under 2 seconds.

Filed Feb 5, 2026 · Engine · FL

I am submitting this complaint regarding a serious transmission failure on my 2020 Ford F-150. At approximately 68,000 miles, the vehicle began exhibiting dangerous and unpredictable driving behavior, including hard jerking, sudden hesitation, and unexpected deceleration and acceleration while driving. The vehicle would jerk aggressively during gear changes and decelerate without warning, particularly at lower speeds and during normal traffic flow. This behavior significantly compromised my ability to maintain consistent speed, safely merge, or respond to traffic conditions. On multiple occasions, the sudden loss of power and hesitation created a safety hazard, especially when driving in slower or congested traffic, as surrounding vehicles were not anticipating abrupt deceleration. Due to the severity and persistence of these issues, the transmission ultimately required complete replacement. A brand new transmission was installed to correct the problem at only 5 years old and barely over the Ford mileage warranty expiration criteria. This failure occurred well before what I would consider normal or expected transmission life for a modern full-size pickup truck and presented a clear safety risk to myself, my passengers, and other motorists. Sudden jerking and loss of power at speed creates a high likelihood of rear-end collisions or loss of vehicle control. I believe this issue reflects a potential defect in the transmission system and should be investigated to prevent similar safety risks for other drivers.

Filed Feb 1, 2026 · Engine, Transmission · NC

I am writing to provide supplemental information regarding my existing safety complaints (IDs XXXand XXX). This update concerns a documented failure by Ford’s authorized dealer network to perform mandated Customer Satisfaction Programs (CSPs) that directly correlate to the catastrophic powertrain failures I have experienced. Timeline and Documentation of Failure: • August & September 2025: As previously reported, my vehicle suffered sudden "Reduced Power" malfunctions while in motion (P0734/P07F7), leading to a full transmission replacement. Discovery of Non-Disclosure: My records now confirm that on November 11, 2022—just weeks before I purchased this vehicle as a Ford Blue Advantage Gold Certified unit—CrossRoads Ford (Dunn, NC) documented that 21N03 (Cam Phasers), 21N08 (PCM Reprogram), and 21M06 (Tailgate) were outstanding. • Breach of Duty: Despite this knowledge, the dealership sold me the vehicle on December 3, 2022, without completing these safety-related service actions. Furthermore, as the registered owner, I never received the required notification from Ford Motor Company regarding the 21B10 program or its supplements. Safety Implication: The failure to apply the 21B10/21N08 updates directly contributed to the mechanical failure of the cam phasers and transmission. This resulted in the vehicle entering "Limp Mode" during highway operation, creating a severe risk of rear-end collisions due to the sudden loss of motive power. I request that these facts be added to my existing case files. The lack of manufacturer oversight regarding "Certified" vehicle standards has resulted in a vehicle that was represented as safe and fully maintained while actually harboring known, unaddressed mechanical defects.INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)