Will Swapping U140F Require ECM Flash?
installing a used JDM U140F.
Question is will the ECM relearn the new transmission without issues? Or, will the ECM require service before operating the car?
I've seen yes and no on this subject. My trans failure is due to a planetary gear decamping from the rest of the area. The OE transmission was working one hour, then had an odd noise and sudden cease to function. I knew this was gonna happen as the last trans change had two tiny corners of a gear stuck to the magnet. No other metal and fluid not burnt or contaminated.
Any other thoughts or warnings on this swap are quite welcome. I'm not a Lexus mechanic. Retired rice burner mechanic. Mechanically, no problem, but? I have factory SMs. The engine/cradle assembly is ready to drop. Have if out this weekend.
Thanks







