Powerboost TSB Harsh 1-3 upshift

[dmac]

5 day update:

It's been really cold this last week (20's to 40s), and even when cold the truck shifts very well at low speeds. Also seems to hunt for gears less. I would highly recommend anyone with a pre 4/23 build get this done.

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[BlacLion]

5 day update:

It's been really cold this last week (20's to 40s), and even when cold the truck shifts very well at low speeds. Also seems to hunt for gears less. I would highly recommend anyone with a pre 4/23 build get this done.

thanks for the info. I plan on having my truck flashed next time I’m in (near February). I am a March build date, and it’s running okay for me but I have noticed some harshness in lower gear shifts. Might as well get it taken care of!

 

[EricR]

My truck was dealer ordered and was in transit when I first started tracking it.

How can I retrospectively determine the Build date?

Thanks!

-Eric

 

[Sapphire]

My truck was dealer ordered and was in transit when I first started tracking it.

How can I retrospectively determine the Build date?

Thanks!

-Eric

You can get an approximate date within a week or so from the blend date. The blend date is at the top of your window sticker just left of center.

 

[TBondu]

Just got this done as well. I wouldn't say my 1-3 upshift was awful before but after the update it's night and day better. I'd highly recommend it.

 

[Orlando150]

I had this service done today. It seems better but I haven't done a lot of driving.

Take it in if your truck meets the criteria.

 

[dmac]

Driving in slippery mode today - truck started to slip in the snow, and revs went to 3200 in first gear under light throttle.

So I braced for the dreaded BANG into 3rd gear...

But low and behold, the revs came down, the 10r80 smoothly shifted into 3rd gear & off I went with my day!

 

[Sentinel1201]

I called 3-4 dealers in the DFW area and most of them were non-committal on even performing the TSB saying they have to "diagnose" my transmission issue first. Then they said to bring it in mid-February.

Still calling....

 

[uavmx]

I had a CEL come on and they performed TSB 21-2131. I had mentioned the shifting issues and the TSB referenced here....got the usual well ford blah blah need to diagnose blah blah there's lots of TSBs it might not be related blah blah crap. Fortunately the 21-2131 is the same procedure as this TSB, the tech knew about this TSB and indicated it's the same fix and should make a difference. I can confirm the shifting is noticeably better on my drive home. I think it's starting the engine a little sooner/ensuring it's on in first gear, then moves to 3rd and stays there a little longer/higher RPM. Will report back after a few days.

 

[chrisp993]

I had the dealer perform the TSB on my (Powerboost) transmission - it's been 1k miles and the difference is night and day, no more "surging" from 1-3 and all shifts now seem smoother. Recommend anyone affected get this done ASAP

 

[chrisp993]

Except ... could be the recent cold weather and high winds (Michigan) but my MPG seems to have dived by in the 1k-2k miles since TSB by approx 1.5mpg. Anyone else seeing this?

 

[Snakebitten]

I didn't have my dealership even TOUCH my Platinum Powerboost. (7 months in my possession) But yea, colder temperatures are definitely affecting the fuel efficiency for at least the first 7 miles or so. Obviously because it takes longer for the normal operating Temps of the engine coolant, transmission fluid, and likely the battery itself.
Or put another way, it's taking much longer for my commute "This Trip" mileage meter to reach 20+mpg. It eventually gets there because my trip is long enough. But with the late start for getting a healthy dose of EV mileage, I arrive at my destination before I can get to 23-24 mpg.

I notice if I start a trip with the truck already warmed up good, the "This Trip" data is far quicker to climb, resembling warmer weather.

All makes sense really

 

[Nighsight]

Had the TSB done today. I immediately noticed a difference in the shifting. The truck was great to drive, but this just makes it even better. I did notice the new PCM calibration changed the cold temperature strategy a bit. I just filled up so I can determine if there are any differences in fuel economy.

 

[toyko joe]

Got the TSB done, first time in since owning it I have seen 2nd gear shown illuminated green on the gear tree. The truck drives about the same otherwise.

 

[Snakebitten]

Got the TSB done, first time in since owning it I have seen 2nd gear shown illuminated green on the gear tree. The truck drives about the same otherwise.

But you aren't saying that it no longer skips 2nd? Certainly not in Normal and/or Eco mode?
I'd be SHOCKED if Ford released a shifting strategy for the 10r80 that eliminated the practice.
Aftermarket 10r80 tuning can accomplish that, although not for 2021 trucks obviously. But I can't imagine Ford doing so. They have way too much invested in their EPA goals and the required compromises that burdens the consumer with.

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