2021 Ford F-150 Hybrid: harsh or hard shifting

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 23, 2026 · TX

Formal Financial Assistance Statement RE: Goodwill Cost-Share Request for 2021 F-150 King Ranch VIN: [XXX] Current Mileage: 119,000 miles Diagnostic Trouble Codes: P2704, P07E6, P2886, P2885 Dealer Repair Quote: $9,820.50 (Full Internal Transmission Replacement) To Whom It May Concern at Ford Motor Company and Dealer Leadership: I am formally requesting a corporate Goodwill Cost-Share for the catastrophic internal transmission failure on my 2021 F-150 King Ranch. While this vehicle is slightly past its 100,000-mile powertrain coverage, a total mechanical failure on a top-tier luxury vehicle at this stage—caused by well-documented, inherent factory defects—is entirely unacceptable. The diagnosis and fault codes pulled by the certified mechanic map directly to systemic, factory-recognized hardware flaws in the 10R80 10-speed transmission: 1. The Core Mechanical Failure (TSB 24-2209 / TSB 23-2250): My truck exhibits severe gear slippage and loud internal clunking, triggering code P2704 (Friction Element E Apply Time). As documented heavily by Ford’s own service network, this code is the direct result of a design flaw where the internal CDF clutch drum bushing migrates out of place under heat, slicing internal seals and destroying line pressure (triggering pressure codes P2885 and P2886). 2. The Safety Concern (Code P07E6): My transmission has also thrown code P07E6 (Unable to Engage Park), which directly mirrors the mechanical components Ford is actively tracking for transmission parking pawl issues. Ford Motor Company has issued multiple Technical Service Bulletins acknowledging this exact failure sequence and has since redesigned the CDF drum assembly to correct the manufacturing flaw. I should not be held solely responsible for a $9,820.50 repair bill caused by a component that Ford has publicly acknowledged was defectively designed from the factory. As a loyal Ford customer driving a premium vehicle, I expect Ford to stand behind its product. I am req INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION

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 1, 2026 · Transmission · TN

I'm reporting a transmission problem on my 2021 Ford F-150 with the 10R80 automatic transmission that I believe is a safety issue, not just a reliability one. The truck currently has about 55,000 miles on it. Right now the truck shifts hard and jerks every time I drive it, and it's especially bad at low speed. The worst situation is creeping through a parking lot looking for a spot, the transmission drops down into first with a clunk and a jerk, and then kicks again when it shifts back up out of first. It's rough enough that I've taken to putting the truck in "Eco" drive mode on purpose, because that softens the shift profile and takes a little of the edge off. Once I'm out of the low-speed stop-and-go and up to normal road speed, it seems to smooth out and drive okay, but the low-speed shifting is genuinely excessively rough. From what I've read, this matches the known 10R80 problem where the CDF clutch sleeve can move axially and cause hydraulic-circuit leaks, which leads to slipping, RPM flares, delayed or harsh engagement, and unexpected shifts. Everything I've found says this condition progressively worsens as the transmission degrades. That's exactly why I'm filing now rather than waiting. A hard, unpredictable shift or a loss of propulsion at the wrong moment — pulling into traffic, crossing an intersection, merging — can easily cause a collision. I don't want to wait until it fails in a dangerous spot and someone in my family gets hurt. I'd like the federal safety agency to investigate the 10R80 CDF clutch-cylinder/sleeve condition on Ford F-150s and to review Ford's warranty claims, dealer repair records, transmission replacements, and other owner complaints to determine whether this is a defect requiring a recall. Owners shouldn't have to wait for a dangerous failure before a known condition like this is addressed.

Filed Feb 3, 2025 · Transmission · IA

10 speed transmission has started shifting hard at times and is random when it occurs. At times the hard shift comes with some stuttering under normal acceleration.

Filed Jan 25, 2025 · Transmission · AL

Multitude of transmission problems, Have smelt clutches in the transmission burning very strongly twice now. Hard shifting up shifting and downshifting. Slamming into gear almost locking up the back wheels. Has failed to move with transmission binding up putting it in reverse. Multiple slippages and different gears. After the truck is stopped at a light for 10 to 30 seconds there will be a hard clacking sound and the transmission that can be felt in the floor. Extreme hesitation almost causing an accident pulling out into traffic. Check engine light one time for faulty Park solenoid and the vehicle would not come out of park. Disconnected and reconnected the batteries. Cleared the code and finally got it to come out of park. The code cleared after 3 days. Was working with the dealership over the phone remotely at the time with it. They said it disappeared and they didn't know why. Transmission has been flushed at 50,000 miles by ford dealership. Ford dealership has done a reprogramming on it so far. Transmission still had problems had a Ford take a ride with me. He stated that it need to be rebuilt or replaced. Ford dealer is dragging their feet to do anything. I have many text messages into the service writer updating him of new problems and current problems as they occur. They are fully well aware of the issues. I drive a lot like 6,000 miles a month and I think they just don't want me put miles on their loaner vehicles for their faulty transmission problems. I purchased the vehicle in February 2024 problems have been occurring since purchase.

Filed May 6, 2022 · Suspension · VA

Very loud grinding sound coming from the rear axle/ wheel hub area. Then a clunking as if something was loose or rattling around inside the rear hub. Turns out the axle bolt has sheared off.