Transmission starts shifting roughly, then issues go away.

[ctechbob]

I think the thing that got me thinking about it doing the "re-learn" thing and then it smoothing out was around the same time, I did my morning routine of turning off ASS. After the last time I turned it off, the thing stayed off. That started making me thinking maybe Ford did an over the air update that somehow caused a reset in the tranny. I have been getting a lot of reminders related to over the air updates, etc. lately. Anyway, probably time to check the TSB status.

I don't think they do any OTA programming of anything other than the radio.

That wouldn't kick off a tranny relearn.

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[Tann3rth3hamm3r]

My 2020 Lariat w/49k is at the dealer now for delayed reverse in cold weather, surging at cruise speeds, rough shifting especially downshifts…feels like someone hits the rear bumper slightly. Just got a call from the service guy. Ford says this is normal behavior. I call BS! Last Ford I’ll ever buy! I hope they enjoy screwing their customers because they are bleeding buyers by the thousands because of their policies.

The delayed reverse in cold weather is the CDF drum. You need the latest tranny TSB done.

Surging at cruise speed and rough shift is likely DPFE sensor needs replacement from the factory one. If you get the part it is very easy to replace yourself. Just need the sensor but some have replaced the tubing as well (significantly more expensive and not likely necessary).

Get those two things done and you will be good to go. If Ford won't do the TSB under warranty than pay for the hydraulic pressure test on the tranny and it will fail and then they can do it under warranty.

 

[Chris M]

The delayed reverse in cold weather is the CDF drum. You need the latest tranny TSB done.

Surging at cruise speed and rough shift is likely DPFE sensor needs replacement from the factory one. If you get the part it is very easy to replace yourself. Just need the sensor but some have replaced the tubing as well (significantly more expensive and not likely necessary).

Get those two things done and you will be good to go. If Ford won't do the TSB under warranty than pay for the hydraulic pressure test on the tranny and it will fail and then they can do it under warranty.

That was the deal on mine exactly. If it didn't fail the test then the diagnostic and loaner charges were my responsibility.
Because it did fail, Ford paid for all but the gas in the loaner.

 

[Trustable]

Where in Michigan are you?

I was in south east, now am located around mid Michigan planning on moving even further north possibly into the UP if I can find a place.

 

[Msfitoy]

I had a strange issue recently. One day I noticed the transmission shifting roughly, having a hard time deciding when to downshift on grades, clunky between some shifts, etc.

I thought well here it comes, the dreaded transmission issues I have heard so much about. In the last few days, I noticed the transmission seems to have gotten back to its old self, shifting fine, no clunking, no issue with downshifting when a steep grade is presented, everything is Jake.

My assumption is for some reason it reset to a factory default and took some time to do its relearning thing, but I frankly don't know enough about this transmissions to know if that is even possible. Anyone who knows a lot about this stuff would be really welcome to chime in.

It will not fix itself...only get worse...get it fixed asap...

 

[Stevedbvik1]

I was in south east, now am located around mid Michigan planning on moving even further north possibly into the UP if I can find a place.

Nice, We’re in the West Michigan area

 

[Trustable]

Nice, We’re in the West Michigan area

Okay. Nice! Looked like you guys got quite a bit of rain the last few days.

just realized I completely went off topic with the thread, my bad!

 

[4x4 Ranger Man]

I don't think they do any OTA programming of anything other than the radio.

That wouldn't kick off a tranny relearn.

Just scrolling through other forms is that you on Bob is the lube oil guy LOL

 

[ctechbob]

Just scrolling through other forms is that you on Bob is the lube oil guy LOL

Yep, I use the same name almost everywhere.

 

[4x4 Ranger Man]

Yep, I use the same name almost everywhere.

I was reading up on Lubegard Platinum and come across your post there.

 

[ccasanova22]

I have had a full CDF drum replacement and exactly what you are describing about 15,000 miles later. I have no other signs of failure (yet), but keeping an eye on things as I don’t want it to leave me stranded and spill fluid everywhere while refusing to down shift. Since it’s “working” for now I’m not sure if this is normal or all 10R80’s will eventually let loose before 175k.

Someone who is a fleet manager told me he’s able to get 300k or more out of the last gen 6R80 equipped F-150’s, but has not seen a single 10R80 last past 175k which is concerning.

 

[Tim H.]

My 2020 Lariat w/49k is at the dealer now for delayed reverse in cold weather, surging at cruise speeds, rough shifting especially downshifts…feels like someone hits the rear bumper slightly. Just got a call from the service guy. Ford says this is normal behavior. I call BS! Last Ford I’ll ever buy! I hope they enjoy screwing their customers because they are bleeding buyers by the thousands because of their policies.

UPDATE:
I took my truck in again to the dealer and told them to check the DPFE solenoid because I saw on YouTube a guy who describes my symptoms exactly & suggest it be replaced. Guess what? The dealer’s mechanic tested the DPFE solenoid and found it o be clogged and full of moisture. Got it replaced and voila my issues are gone. Runs much better and the Transmission shifts like new. I’m very happy with the results.
Hope this info helps someone who may be pulling their hair out of their head.

 

[Msfitoy]

UPDATE:
I took my truck in again to the dealer and told them to check the DPFE solenoid because I saw on YouTube a guy who describes my symptoms exactly & suggest it be replaced. Guess what? The dealer’s mechanic tested the DPFE solenoid and found it o be clogged and full of moisture. Got it replaced and voila my issues are gone. Runs much better and the Transmission shifts like new. I’m very happy with the results.
Hope this info helps someone who may be pulling their hair out of their head.

I still fail to understand what the DPFE's connection to the transmission...it causes stumbles and general drivability issues that might seem like transmission but it's NOT connected or drives any function of the transmission...correct me if I'm wrong?

 

[ctechbob]

I still fail to understand what the DPFE's connection to the transmission...it causes stumbles and general drivability issues that might seem like transmission but it's NOT connected or drives any function of the transmission...correct me if I'm wrong?

You're correct, not connected to the trans.

But it causes the engine to surge in odd ways that makes it seem like the trans is acting up.

IE if the trans is going for a shift, say from 1-2 and it expects the engine RPM's to fall in a predictable way, but it isn't, then odd things are going to happen.

Why it doesn't throw some kind of code is anyone's guess, but in this case, a rough running engine seems to be enough to spazz out the entire driveline.

 

[Msfitoy]

You're correct, not connected to the trans.

But it causes the engine to surge in odd ways that makes it seem like the trans is acting up.

IE if the trans is going for a shift, say from 1-2 and it expects the engine RPM's to fall in a predictable way, but it isn't, then odd things are going to happen.

Why it doesn't throw some kind of code is anyone's guess, but in this case, a rough running engine seems to be enough to spazz out the entire driveline.

I had DPFE and trans failure simultaneously...I fixed the valve first as the symptoms didn't involve changing gears...more like applying and letting off the gas while trying to maintain a steady speed causing a jerking sensation...the trans issues was not anywhere benign as the valve...slamming into gears up/down, missing gear changes, not changing gear, blowing out fluids...can't mistake that with anything else...

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