2018 Ford F-150: harsh or hard shifting

Filed Nov 9, 2026 · Transmission · MD

At approximately 89,000 miles, my vehicle experienced a suspected CDF drum bushing failure in the Ford 10R80 10-speed automatic transmission. Symptoms included delayed, harsh, and erratic shifting, intermittent loss of gear engagement, and unexpected gear changes that created serious safety hazards. While traveling approximately 60 mph in ninth gear, the transmission unexpectedly lost engagement, indicated first gear, then abruptly returned to ninth gear with a violent jolt. This triggered TCM diagnostic code P07F6 (Gear 9 Incorrect Ratio). The transmission also repeatedly failed to engage third or fourth gear, instead fluctuating between first and fourth with little to no power. This created dangerous situations when merging into traffic and making left turns across oncoming traffic because the vehicle could not reliably accelerate when needed. An authorized transmission repair facility identified the CDF drum bushing as the likely failure point, consistent with Ford TSB 23-2250, which addresses known 10R80 transmission shifting concerns. The transmission was ultimately replaced with a remanufactured unit incorporating Ford's updated components intended to address the problem. Ford has documented awareness of these transmission issues, yet no major recall or meaningful customer assistance has addressed affected owners outside warranty coverage. I previously purchased an extended warranty and reported harsh shifting to dealership service advisors but was never informed of the applicable TSB. I was discouraged from scheduling repairs after being told there was a three-week wait and that rental coverage was uncertain if the repair was denied under warranty. The vehicle was primarily a daily commuter with minimal towing or hauling. Failure at 89,000 miles under normal driving conditions raises serious concerns about transmission reliability and safety. Unexpected loss of engagement, incorrect gear selection, and loss of acceleration at highway speeds create subst

Filed Sep 25, 2026 · Transmission · CA

I own a 2018 Ford F-150 equipped with the 10R80 automatic transmission. The vehicle currently has approximately 70,000 miles. The transmission has developed intermittent harsh shifting and, more concerningly, has repeatedly appeared to slip or disengage from gear while the vehicle is moving. On multiple occasions while driving at highway speeds, pressing the accelerator did not result in acceleration because the transmission was no longer effectively transferring power to the wheels. This caused a temporary loss of motive power while traveling in traffic. The transmission subsequently re-engaged. The vehicle has also stored diagnostic trouble code P0734, indicating an incorrect 4th-gear ratio. The transmission fluid has been serviced, the vehicle software is current, and an adaptive transmission relearn has been performed by a mechanic. The P0734 code and transmission symptoms returned after these measures. Ford has issued Technical Service Bulletin 25-2475 for 2017-2020 F-150 vehicles equipped with the 10R80 transmission. The bulletin includes P0734 and harsh or delayed transmission operation and identifies axial movement of the CDF clutch-cylinder sleeve causing hydraulic circuit leakage as a possible cause. I am reporting this because the unexpected loss of propulsion at highway speeds creates a safety concern, particularly when merging, changing lanes, or traveling in surrounding traffic.

Filed Sep 23, 2026 · Transmission · OH

2018 Ford F-150 XLT Power Train / Transmission (10R80 10-Speed Automatic) ~100,000 miles (99,737) While accelerating, typically at neighborhood speeds, we sometimes get a hesitation/delay in shifting, which causes a pause and then a hard shift jerking forward, which makes it unreliable at times. Not getting any dashboard warning lights, and has had the transmission flushed at 80k miles by a Ford dealership. A Ford dealership diagnostic inspection confirmed an internal mechanical defect: a failure/migration of the internal Teflon-sealed sleeve on the CDF clutch drum. The dealership technician also noted harsh upshifting between gears 3 and 4, and harsh downshifting between gears 6 and 5. The sudden, unpredictable loss of power during low-speed acceleration creates an immediate safety hazard. It leaves the vehicle vulnerable to rear-end collisions when merging into moving traffic, navigating busy intersections, or pulling out onto roadways, as the truck fails to accelerate when commanded. Furthermore, the violent gear slamming can cause momentary loss of traction or driver distraction under low-grip road conditions. Researching, what we're experiencing is very common with the 10R80 transmission that we have, and documented in TSB 23-2152, and TSB 25-2126. From what I'm reading, Ford redesigned the CDF drum in 2023 to try and correct the manufacturing issue.

Filed Sep 17, 2026 · Transmission · TN

After Fords TCM recall the truck’s transmission has not acted correctly, very hard shifts, staggered shifting and warning lights for shifting issues or low power due to loss of signal from computer. It has gotten worse it now is sticking in 4th and 7th gear, acts as if slipping and completely stopped the truck in a busy intersection where I had to shut the vehicle off and restart before it would go in gear manually. Truck has lunged forward in reverse, went into low gear on the interstate and have given codes for fault detection. I’ve had the vehicle look at by a certified mechanic and his computer shows no connection between computer and transmission then shows partial connection and the full connection. Torque Converter shows good and so do the cliches and solenoids. This is dangerous and could cause an accident if not fixed, whatever ford’s update was has made my computer loose connection with the transmission and has put a fault that could possibly cause an accident or fire.

Filed Sep 16, 2026 · Transmission · PA

The 10 speed transmission does not shift smoothly and will periodically shift hard when downshifting from 4 to 3 and 3 to 2. Ford is aware of bushing walking which they addressed in 2022. I am one year out of my warranty which Ford would not address when under warranty but issue was less of an issue. Now that it is routinely shifting rough, they will not stand behind their transmission they knew was problematic. I have on numerous occasions been almost rear ended because they hard shift mimics a hard braking without warning.

Filed Sep 13, 2026 · Transmission · KS

Started with harsh shifting, lead to no shifting and no movement. Shifting came back and lunged forward and harsh stop. Happened multiple times and now vehicle will not move.

Filed Sep 4, 2026 · Transmission · GA

My Ford F-150 Supercrew XLT 10R80 10-speed completely failed resulting Ford replacing it with a new transmission unit for a cost to be of $7,300. As the transmission failed at 96,000 miles the gears would be skipped with harsh shifting, not fully engaging 4th gear and at times while driving would refused to shift into any gear and high revs and me unable to accelerate. I was nearly involved in a crash when I would pull out into traffic legally but suddenly unable to accelerate and approaching cara from the rear needed to suddenly brake and change lanes to avoid a collision. All diagnosis was conducted by Ford. At first it cost me approximately $300 for them to drain and fill transmission fluid. When that didn't fix the problem they then said it was the DCF drum failure at a cost of $5000. When they were unable to fix it they informed me that they needed to install a brand new transmission at a cost of $7,300. Current mileage is approximately 98,300 miles. As a prior certified LEO Traffic Homicide Investigator, I was terrified driving the truck knowing what could happed if it failed as I was crossing traffic or pulling out and fail, as is had already and therefore I was unable to use my vehicle.

Filed Sep 2, 2026 · Transmission · PA

1st problem transmission: Hard shifting up and down in certain gears. 3 gear seems the worst. When slowing down to almost stop it down shifts and lurks forward which can cause a safety issue. Loud banging noise when it does this hard shift. 2nd problem when starting the truck up get a loud chain rattle. Think it’s the phaser/cam rattle I keep reading about with no fix. Mileage on my truck is 63,000 miles never tow or haul anything. Crazy ford can sell something like this and be ok with it.

Filed Sep 2, 2026 · Transmission · IN

10R80 Transmission Delays when shifting and when it does engage its harsh shifts.

Filed Aug 17, 2026 · Transmission · MD

My 10R80 transmission has failed at 79000 miles. This tranmission has been problematic during the life of this truck. Hard shifting, delayed shift, clutch flutter. Ford refused to honor my extended warranty that covers the power train beyond the 5/60000mile base warranty.

Filed Aug 13, 2026 · Transmission · GA

10R80 transmission will jerk and hard shift randomly at times. Also appears to get stuck in gear and/or downshift at inappropriate times.

Filed Aug 12, 2026 · Transmission · TX

The internal mechanical failure of the Ford 10r80 transmission due to design fault causes unsafe driving conditions as the transmission stalls (fails to power at request) or lunges (powers forward without driver input) causing unsafe conditions for vehicle occupants and nearby vehicular & pedestrian traffic. My vehicle exhibits two well known and documented conditions; stalling and lunging forward. The most common failure is that the transmission fails to shift from 1st to 3rd gear in a low speed condition (e.g. navigating parking lots amongst pedestrians). Upon the failure to shift, the vehicles computer system senses this, overrides by raising the vehicle RPMs significantly without driver input to do so, the vehicle then hard shifts and jerks forward several feet in an uncontrollable manner. Anticipating the jerk and overriding with the brakes fails to stop the vehicle from lunging forward. The second most common failure is the transmission totally failing to provide drive. A common scenario would be sitting at a traffic light waiting to make a left turn. Upon the opportunity to make a safe left turn, the vehicle at times will roll slightly forward (in its first gear), it will then attempt a shift while the vehicle may potentially still be in cross-traffic, and the vehicle at times will fail to drive, without any inputs (brake, gas, manual shift) getting the vehicle out of the no-drive condition, and leaving the vehicle subject to a dangerous potential for collision or safety hazard. The issues with the 10r80 transmission failures are well documented, well understood by Ford Motor Company, and specific to my vehicle have been identified by a reputable dealer as requiring repair. My vehicle's transmission is exhibiting failure at 47,000 miles. No warning indications exist prior, during or after this repeatable incident. Ford has since fixed the design flaw, but refuses to address the safety issue with vehicles manufactured before the re-design.