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10 speed transmission issue

KirkBay

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Kirk
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Prescott AZ
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2021 FX4 PowerBoost, 64 El Camino, 65 Mustang Conv
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2021 PowerBoost with 16K miles. Sometimes, when downshifting it feels like I've been rear-ended. Haven't yet figured if there is a common denominator.

Traded in a 2016 Lariat with 6-speed and am really hating life because of it.
Had local dealer apply TSB 21-2407A yesterday. Immediate improvement with shifting issues. Not sure if it's my imagination or not, but seems to take quite a bit longer for the truck to go into electric mode.
 

chrisp993

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Chris
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'21 F150 Platinum, '15 Audi S4, Spec Iron Mustang
thats the TSB 21-2131

curious to see how long it lasts.
I think the TSB is 21-2407 - see original thread

Getting on for 2k miles since the reprogram was done and it seems to be holding fine - the transmission has lost the surging/jerkiness of the 1-3 upshift.
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