Auto to manual swap - ECU wiring harness the same? Also SF3/ECU questions...

007 said:

I have read comments by people selling the ECU harness that the 5 speed and manual harnesses are the same. Anyone know if this is true?

Also, I have an ECU/tuner question. I have a SF3 tuner with custom dyno tune for the auto ECU. Can I save this tune to the SF3, set the auto ECU back to stock, and load my tune onto a new 5 speed ECU? Obviously I have to have the dealer address PATS if I swap the ECU.

What functions are different between the auto and 5 speed ECU? Is an ECU swap even necessary, or can a tuner simply disable the auto functions?

Thanks

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most likely the strategy of the other ECU will be different so your current tune would not even work, it would be just as simple to get a new tune for manual swap with your current ECU , probably be less work for your tuner to just go in and change those particular trans switches off

007 said:

Can you please elaborate? Thanks

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would take too much time to type it all , basically call your tuner and ask him what he would prefer you do

Maybe I'm missing something. How is it possible for a manual and an automatic to have the SAME wiring harness? The manual has a very simple harness for the rear O2 sensors, OSS sensor, and reverse switch.

Where as the automatic has those same things as well as the DTR connector. If the two harnesses were the same, then every manual transmission would have a hanging connector for the DTR.

Reminder about the VSS vs OSS speed sensor. Make sure that the replacement transmission has a matching sensor. For the 1999-2004 MY, that means an OSS sensor from the same MY range.

I can say that the body harnesses are the same between manual/auto.

I can say that the PCM is different between the manual/auto. However, a tune can make it work.

FWIIW, the manual transmission harness is only $60-70 NEW from Ford. So I wouldn't do much ebay trolling before just buying directly from Ford.

I don't understand the question about the bell housing (which has been answered before). The modular motors share a bolt pattern. So either transmission will bolt right up as long at it came from the same motor (the V6 does NOT have the same bolt pattern as the V8). Obvisouly, the manual will need a pilot bearing and a flywheel.

The starter is the same. The starter harness is the same.