97 7.3 pcm help

knordvik

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Dec 29, 2016
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Hi guys, here's my problem. I did a motor and trans swap into my 1978 f150. I told the 7.3 and e4od out of a E superduty 1997 cutaway van. I want more power out of it cuz its a dog. I know the superdutys are de tuned so you don't twist drive shafts with heavy loads but that's not a problem anymore. I put a buddys pcm in, out of his 97 f250 and started right up. The problem is that the trans thought it was in 3rd gear. I had to manually put it in 1st and so on. Any ideas on how to use an F series pcm in it?
 

Mick

97 Powerstroke
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Is the selector switch on the side of the transmission adjusted correctly and functional?
 

clem

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Did you swap the rear differential? It has the speed sensor.
 

BIG JOE

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The PCM needs to be the one from the Van you pulled the 7.3 & Trans from. Or one identical to it by part #.
 

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