2021 Ford F-150 Hybrid transmission problems

Filed Nov 9, 2026 · Transmission · NM

Violent upshift and downshift, erratic shifting, difficulty finding gears, high revs, stuck in 10th gear more than two times, failure to find gears, loud bang when CDF drum seal blew along with loss of power causing it to rapidly slow down, unable to accelerate due to it being stuck in second gear, and unable to accelerate from takeoff causing close calls with traffic.

Filed Nov 7, 2026 · Transmission · CT

On January 16, 2026, my Ford F-150 experienced catastrophic 10R80 transmission failure while I was driving to work on the highway. Prior to the failure, I experienced increasingly severe and erratic upshifting and downshifting, particularly between 3rd and 4th gears. The transmission shifted harshly and unexpectedly, raising concerns about its reliability and safety. On the morning of January 16, 2026, the transmission suddenly failed without notable warning. It appeared to lock up, producing extremely loud and alarming mechanical noises. While traveling at highway speed, the rear wheels locked up, causing an immediate and dangerous loss of vehicle control. I was forced to perform evasive maneuvers to avoid striking nearby vehicles. Fortunately, I was able to regain sufficient control to pull onto the highway shoulder without a collision. This incident could easily have resulted in a serious crash, injuries, or fatalities. Following the incident, I contacted Ford and the dealership regarding the failure and safety concerns. Both denied warranty coverage, leaving me responsible for more than $8,000 in out-of-pocket expenses to have the transmission rebuilt. This was not merely a mechanical inconvenience. The combination of severe, erratic shifting followed by catastrophic transmission failure and rear-wheel lockup at highway speed presents a serious safety hazard. I am submitting this complaint because I believe the Ford 10R80 transmission may have a safety-related defect that places drivers and others on the road at risk. Other owners could experience the same sudden failure and loss of vehicle control without warning. I urge the federal safety agency to investigate these transmission failures, particularly the potential for sudden transmission lockup and rear-wheel lockup while driving at highway speeds.

Filed Nov 6, 2026 · Transmission · MI

Lurching/Hard shifting from engaging transmission shifter from park to drive. Audible clunk with lurching 1st to Second and Third gears.

Filed Oct 29, 2026 · Electrical, Fuel system · VA

My 2021 F-150 PowerBoost hybrid repeatedly lost propulsion while traveling on the highway in early October 2026, including four incidents on one trip around October 3. At approximately highway speed, the tachometer dropped to zero while the selector remained in D, and the truck coasted as if in neutral. There were harsh shifts around 9th/10th gear and difficulty accelerating beyond approximately 70 mph. A vehicle warning appeared. Disconnecting and reconnecting the battery temporarily restored operation. Sudden loss of drive power in highway traffic created a collision risk. The underlying cause has not been independently established. A Ford dealer's October 2026 inspection recorded an internal transmission hydraulic leak, clutch-disconnect trouble codes suggesting a hybrid drive unit concern, a recommendation to replace the transmission with the hybrid drive unit, and high-voltage battery cell-balance DTCs. More recently electric-driving mileage has remained at zero and the gasoline engine continues running while stationary. Severe shifting and vibration had varied between 2H and 4A modes. Around June 2025 the vehicle also stopped operating and was towed to the same dealer; I understand a 12-volt battery was replaced. Photographs from that period show Stop Safely Now and other warnings around 70,000 miles. I request investigation of whether that earlier incident and the present faults are related; I do not claim the same root cause has been proven. Exact diagnostic codes and earlier service details should be verified from the dealer records. The October intake odometer was recorded as 99,632; mileage at the highway incidents is not precisely known.

Filed Oct 10, 2026 · Electrical, Transmission · TX

I picked up my F-150 Powerboost from the Ford dealership after getting and oil change. Recorded mileage was 100,385 (just 385 miles out of the 100,000 EV warranty. Just 2 hours after getting it back the check engine light came on for P0B24 for hybrid battery failure. The Ford dealership diagnosed the issue and confirmed the entire hybrid battery has to be replaced. I requested Goodwill assistance from Ford being that it was <500 miles out of warranty. Ford denied the request immediately. The Ford service department wrote them an email with official confirmation of the issue and the timing of the issue starting. Ford denied their request for Goodwill assistance/financial help within 20 minutes of the request. The repair is $5,000+ out of pocket.

Filed Oct 6, 2026 · Transmission · SD

Front Differential had a major failure and had to be replaced. Vehicle only has 31000 miles on it. Warranty did not cover anything. Report said fluid was burnt.

Filed Sep 13, 2026 · Engine, Fuel system · MI

Experiencing total stop of acceleration in two occasions: 1) when putting the car in reverse and pressing the accelerator and 2) when making a left or right turn after a yield or stop. And when I say loss of acceleration, I don’t mean hesitation, reduced power, or sluggish acceleration. I mean absolutely ZERO acceleration. I’ll press the accelerator and nothing happens. The engine stays basically at idle, and the truck will not accelerate for roughly 5-10 seconds, regardless of how much accelerator I’m giving it. Then suddenly power comes back and the truck drives normally again. This happens with normal operating temps while driving most of the day. It got to a point where it happened once every day. Very scary stuff when you're pulling out into traffic - major safety concerns with oncoming traffic.

Filed Aug 3, 2026 · Transmission · TX

I am filing a safety complaint regarding a recurring, hazardous transmission failure during highway and incline driving (specifically experienced on mountain highway passes in Arkansas). While driving at highway speeds on uphill inclines, the transmission severely hesitates and struggles to downshift under load. When it finally engages, it violently slams into gear. During these episodes, the truck experiences a sudden loss of motive power and acceleration lag, accompanied by an engine RPM flare of over 400+ RPM. And most recently, I have Live diagnostic data captured during operation revealed a downshift delay of over 3 seconds where the powertrain control module commanded 8th gear, but the transmission physically remained stuck in 10th gear due to severe internal hydraulic pressure loss. This defect presents a severe safety risk on high-speed roadways. Sudden, unexpected loss of power while climbing grades or merging into traffic creates an immediate risk of rear-end collisions from surrounding vehicles. This issue directly correlates with Ford Technical Service Bulletin TSB 26-2287, which identifies axial movement/slippage of the CDF clutch cylinder sleeve as the root cause of internal fluid leaks and gear failure. Because this internal hardware failure causes unpredictable power delivery and driveability loss at highway speeds, I request that the federal safety agency investigate the 10R80/10R80-MHT transmission CDF drum sleeve defect as a critical safety hazard. Finally, Ford motor company, and most cases refuses to repair this known defect under warranty, many owners are experiencing this dealership pushback leaving them with a critical safety issue.

Filed Aug 2, 2026 · Engine, Fuel system · AL

I am reporting a safety-related transmission problem I experienced with my 2021 Ford F-150 equipped with the 10R80 automatic transmission. While driving normally, the transmission suddenly shifts hard/lags on gears 3-5 and sometime higher gears 7-9 at higher speeds. I’ve also noticed a buzzing/metallic rattling coming near the engine from inside. There is also times i can tell i have no power when trying to speed up and the other day i almost thought i was going to get T-Boned. This occurred while on my daily traffic commute to work, 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.

Filed Aug 2, 2026 · Driver assistance, Transmission · NH

Ive noticed that the electric motor sometimes doesnt want to disengage quickly when I step on the brakes. In this incident I had to make a hard brake because someone pulled out in front of me. I had the cruise control on. When I slammed on the brakes the vehicle did not stop fast the vehicle felt as if it was still being pushed by something. Then a small jolt was felt and then the vehicle finally slowed. Had I been going faster or had the car that pulled been closer. This fault would have resulted in an incident