2018 Ford Mustang power train problems

“The 2.3L EcoBoost engine failed due to coolant leaking into the combustion chambers. The dealer found coolant present in cylinders 1 and 4, the cylinder 4 piston washed, and vertical scoring on the cylinder 4 wall. The dealer's recommendation is complete engine replacement. Yes, the engine is available for inspection. The vehicle is currently at the Ford dealership and the engine has not yet been replaced. Coolant entering the cylinders causes misfiring and loss of engine power. The vehicle shook on startup and ran roughly, and the misfire was intermittent and unpredictable. A sudden loss of motive power while driving in traffic or at highway speed is a crash risk to me and to other drivers. Coolant loss into the cylinders also reduces the coolant available to cool the engine, creating a risk of overheating. The vehicle is currently not safe to drive. A Ford dealership has reproduced the issue and confirmed it. The technician retrieved stored codes P0304 and P0316, removed the spark plugs and coils, and borescoped the cylinders. A cooling system pressure test was performed and the vehicle was allowed to sit, after which borescope inspection confirmed coolant in…”

“Was driving my vehicle roughly 10-15mph after a stop, noticed vehicle wasn’t shifting into the gears properly as it was only in 2nd gear and the RPMs kept climbing, when it finally shifted into 3rd gear my transmission proceeded to lockup cause my rear tires to skid and stop in the middle of traffic and in the middle of an intersection disrupting the flow of traffic. Vehicle displayed a wrench light on the dash saying “see manual” as related to a Powertrain issue. Vehicle is in limp mode and barely drives, any shifting after 1st gear will cause the vehicle to lockup and lose all power for several seconds. ONLY HAS 28,330 MILES, DID NOT REACH THE FIRST SERVICE INTERVAL FOR MAINTENANCE ON THE TRANSMISSION.”

“My 2018 Ford Mustang EcoBoost with the 10R80 automatic transmission began experiencing hesitation, delayed engagement, and harsh jerking during low-speed acceleration (15-20 mph), especially when cold. Engine RPM would increase, but the vehicle would hesitate before engaging. The condition worsened over time and eventually the vehicle entered limp mode, causing a significant loss of power and illuminating a wrench warning light. An authorized Ford dealership diagnosed DTC P07F6 (Gear 9 Incorrect Ratio). The dealer verified fluid level, updated the PCM, and performed adaptive relearn procedures, but the problem remained. The transmission fluid was found to be dark with a burnt odor, and the dealer diagnosed an internal transmission failure requiring complete transmission replacement at an estimated cost of $9,250. This created a safety concern because the vehicle did not consistently accelerate as expected when entering traffic, crossing intersections, or merging onto roadways. Delayed engagement and loss of power reduced the ability to accelerate when needed. The vehicle has approximately 82,256 miles and has been maintained according to Ford's recommended…”

“While completing a turn at a T-intersection, the vehicle experienced a complete loss of motive power for several seconds, leaving the car stationary in the path of oncoming traffic. The transmission (10R80) failed to engage, a known symptom of internal CDF Drum sleeve failure (TSB 24-2254). This follows a 'Green' inspection by a dealer on March 23rd where an axle seal leak and shifting issues were overlooked. The failure to engage gear during a turn creates an unreasonable risk of a T-bone collision.”

“I was driving down the road in my 2018 Mustang ecoboost. When all of the sudden slowing down it locked the rear wheels up. I slid off the road and fortunately I didn’t hit anything but it did pop my side skirt off in the rear of the car. Thankfully the person behind me reacted in quick enough time to get around me considering the rainy weather conditions. This is very dangerous. It’s throwing a code for a solenoid B. Had traction control lights. And says see manual. But they all illuminated after the problem first happened. The car has been parked for a while. However someone suggested I try this website. There were no pre warnings to what was going on. The car drove fine up until the point of it just randomly deciding to lock the rear wheels up. I still owe money on the car and have been paying for it for almost two years since it happened. The car has around 100k miles. I saw online where my car is not the only case. One of the cases the car almost got hit by a train. Yikes.”

“The contact owns a 2018 Ford Mustang. The contact stated that while driving at an undisclosed speed, the vehicle suddenly came to a stop while attempting to shift to second gear. The contact pulled over to the side of the road. The contact stated that the failure had been recurring while driving in second gear, which required the contact to release the accelerator pedal before the vehicle could shift to second gear. The vehicle was taken to O'Reilly’s, where it was diagnosed with transmission failure. The dealer and the manufacturer were not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 70,000.”