I have the same problems as u, changed the valve body, update the PCM with the latest firmware. It was good -ish for a week. The main problem for hard shifting is the CDF drum. If the car is manufactured between Aug 2017 and late 2020 it will have the faulty CDF drum. Google CDF Drum 10R80. I...
I have this issues for over a year and I have read every thread about 10r80. I have spoken with various gearbox experts and repair services. The CDF drum is the main reason for many issues because it cannot hold pressure. I have ordered every part that needs to be changed and I will keep you all...
Hi. it's a very common issue. the CDF drum is responsible for 3-4-5 gears. All the problems that many of us have with hard shifting for 3-4-5 or slipping gears is because Ford manufactured a bad part. This is why there is a rev. B for this part.
Ford; Part Number: JL3Z-7H351-B; Replaces...