zak99b5
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Maybe it's a strategy to decrease the warm-up period.
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Interesting. Thanks for sharing. I was going to have the shop check the transmission fluid level to rule that out but it seems that may be a waste of money. Has anyone ruled that in or out?I ended up getting the cam phasers replaced, which I needed, but they assumed that was going to fix the shifting problem and didn't do any additional investigation. I can say the slow shift when cold is still there. I am in chicago and park outside. Today I let the car fully warm up in the driveway while I cleared off all the snow and the RPMs were back down to low idle before I backed out. I can say high RPMs is not my root cause. I still lean more toward cold trans fluid causing slow shifts.
I spoke to a local Ford service advisor a few days ago regarding this TSB and he seemed to be familiar with it. He said that the step -This TSB seems to relate to what we are all describing -
10R60/10R80/10R80 MHT Automatic Transmission - Harsh/Delayed Engagement And/Or Harsh/Delayed Shift - 2017-2023 Ford & Lincoln
2017-2020 F-150, 2018-2021 Expedition/Navigator/Mustang and 2019-2021 Ranger vehicles equipped with a 10R80 automatic transmission may exhibit a harsh engagement/harsh shift/delayed shift. It is possible the vehicle may also have an illuminated malfunction indicator lamp (MIL) or diagnostic...ford.oemdtc.com
Common issue with the 10R80 trans unfortunately. I dealt with the same issues. Remedy was a new trans from Ford. My issues and remedy are documented in the link below.Bad news for everyone who is experiencing this problem. I am at the Ford dealership. I have found out that this is an indication that the clutch packs in the transmission are worn\wearing out. The reason this problem clears up when the transmission warms up is because of part expansion. I was also told that folks are getting between 70,000 and 90,000 out of these POS 10 speed transmissions. I have 90,000 miles on mine. I guess I will be calling Ford today to see if they would be willing to help pay for a new transmission. Apparently they are putting better parts in the newer ones. 4-6 weeks to get a new one with a bill around $5,000. I am not happy and this is what I get for taking the risk of buying a Ford.