TRNW-2: 19 Ford 10R80 help or questions

[Fred Whitaker]

 I think every one I have seen with a bad drum was tripping codes (Don't hold me to that).   But on 10 speeds I think entering the strategy is a must.  You can do it for free with Forscan and a laptop and a cheap dongle from Amazon (just google forscan dongle).  There is a small learning curve. But once you get the hang of it you can enter the strategy in the time it takes to scan a car.  I wouldn't condemn the drum without entering the Strategy. I have also got more than one valve body from Ford that was worse than the one I was replacing.  If your "new" valve body is doing something different than the original I would stick with the valve body theory at least until I entered the strategy.
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From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Ryan D via trnw2 <trnw2 at trnw.net>
Sent: Monday, June 23, 2025 1:03 PM
To: John Lovell <pctrans07 at gmail.com>; Technical Discussion Forum <trnw2 at trnw.net>
Subject: TRNW-2: 19 Ford 10R80 help or questions

Bad CDF drum more than likely. Just my guess
On Monday, June 23, 2025, John Lovell via trnw2 <trnw2 at trnw.net<mailto:trnw2 at trnw.net>> wrote:
Hello everybody, hope you are surviving the heart. Have a 19 F150 with a 3.5 Ecoboost. 74k on the odo. Customer was complaining about harsh shifts. No codes in either the engine or transmission. Sold them and installed a new VB. I haven't entered the solenoid strategy as of yet. Most of the Fords for me have driven out. What I've noticed now after some windshield time is 3rd and 5th are noticeable. If it makes a 1-3 shift, not to bad. But a 1-2-3 shift and 3rd sucks. Very bumpy. Going into 5th is ALWAYS noticeable, up or downshift. I've only been into a couple of these, and the 1 with a bad drum was shifting poorly. Any thoughts as to what might be going on are appreciated. As always, thanks for taking the time.

John




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Ryan
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