2021 Ford F-250 SD: transmission slipping

Filed Sep 24, 2026 · Transmission · NC

Purchased a 2021 F250 brand new from dealership and have had serviced at dealer since new. This truck is equipt with the 10r140 transmission that is a known problem. Starting at 48K miles transmission slipped from 3-5 gear. Report to Mooresville Ford and they “drove” the truck 6 miles and stated they could not recreate the slip. Reported again to Mooresville Ford at ~78k, technician drove vehicle for 12 miles and documented a slight slip between 3-5 but Ford declined to take action and extended warranty to 100k. Reported again at ~96k to Mooresville Ford, dealership held truck for 8 days and drove 6 miles. Declined again to take action and extended warranty to 146k. Reported again to Mooresville Ford at 143k to which they declined action and stated: “without the engine throwing a code they would not cover the truck under warranty.” Had recall 24S78 POWERTRAIN CONTROL MODULE AND TRANSMISSION CONTROL MODULE REPROGRAMMING completed May of 2026 with ~155k. One month after this recall had been completed, a hard down shift from 8-7 and 5-3 started to occur. Reported to Mooresville Ford and they declined to take action and stated Ford would not cover. Down shifting is sudden and harsh and will cause harm to others of truck locks up on road. Someone needs to hold Ford accountable for these bad transmissions. Quote to replace came in at 10k which I am holding out hope a recall comes before I am forced to replace. PLEASE HELP! All service records are on file and can be provided to confirm claims.

Filed Jul 15, 2026 · Transmission · NE

This is a follow-up to my original complaint #XXX, filed XXX, regarding the failure of the 10R140 10-speed automatic transmission in my 2021 Ford F-250 Super Duty (VIN: [XXX]). The transmission began exhibiting symptoms of gear slipping, jerking, delayed and harsh shifting, and pinging from the torque converter around 100,000 miles. These symptoms progressively worsened until the transmission suffered a catastrophic internal failure. As documented in the attached Sid Dillon Ford repair order, an authorized Ford dealer found metal contamination in the transmission fluid and confirmed that a complete transmission replacement was required. The attached Friesen Ford repair order also shows that harsh engagements were present and that a transmission flush failed to resolve the issue. I have also attached a sworn statement from [XXX], an independent automotive technician who has serviced vehicles for my family for several years. In his sworn statement, he confirms that these 10R140 transmissions have known serious ongoing issues and that many mechanics avoid working on them due to these problems. Ford Motor Company was provided with the above repair records and the sworn statement but has denied any responsibility or reimbursement for the transmission failure. The failure created a serious safety risk due to the sudden loss of propulsion while driving. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Nov 30, 2025 · Transmission · NE

My 2021 Ford F-250 equipped with the 10R140 10-speed transmission suffered a sudden internal failure around ~100,000 miles. The failure symptoms and internal damage match the defect Ford acknowledged in Safety Recall 22V‑256, which applies to the 2020 F-250/F-350 trucks using the same 10R140 transmission. Despite identical symptoms and the same transmission design, my VIN [XXX] ) was excluded from the recall. the federal safety agency’s VIN decoder also returned an “ambiguous model year” notice, suggesting this vehicle may have been built during the transition period where Ford continued using the same defective 10R140 components. Symptoms experienced prior to failure included harsh shifting, delayed engagement, gear slipping, and eventual loss of drive. A transmission shop stated they “won’t touch these transmissions” due to known issues. The failure created a serious safety risk due to sudden loss of power while driving. This appears to be a recall scope error. Early 2021 units like mine are experiencing the same 10R140 internal failures as the recalled 2020 population. I request the federal safety agency investigate whether Ford under-reported the affected VIN range and whether the recall should be expanded to include early-2021 F-250 trucks. 10R140 transmission failure on a 2021 Ford F-250. Identical to the failure described in 2020 Recall 22V‑256. Early 2021 VIN, suspected recall scope error. approximately sometime in January 2025 not exact date. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 12, 2024 · Transmission · 2,000 miles · MI

The contact owns a 2021 Ford F-250. The contact stated that upon starting the vehicle, the transmission was slipping. The contact wait for a while before the vehicle responded as needed. There were no warning lights illuminated. The vehicle was taken to a local dealer, but the vehicle was not diagnosed or repaired. The vehicle was taken to three other local dealers: DeSoto Ford (3039 SE Hwy 70, Arcadia, FL 34266); McDonald Ford (6790 Midland Rd., Freeland, MI 48623); and Richardson Ford (3781 S Huron Rd., Standish, MI 48658), and was made aware of TSB: SSM 51420; and that the vehicle was working as designed. The contact was informed that engine oil was moving into the torque converter and needed to warm up for proper operation. The mechanic informed the contact to let the vehicle run for a while before shifting into gear. The manufacturer was contacted and referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was approximately 2,000.

Filed Oct 4, 2023 · Transmission · UT

Known mechanical design issue with the 10R140 transmission CDF drum where a bushing moves blocking / partially blocking fluid transfer ports. This causes transmission fluid overheating, clutch slippage, hard shifting, etc. This mechanical design issue poses a danger to the driver, passengers and other surrounding vehicles when this potential failure occurs.