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Discussion Starter #1
hey getting ready to switch engines... came across a 03 PCM from a 300M for $50 and wondering if I could swap mine out now then do the engine later. other question will my Odometer reading change or will it show the same milage?
 

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PCM as in the engine computer? It isn't worth your while to replace it. The 2.7 computer will run the 3.5 just fine.
 

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if you do switch,, you will have to replace the ecm,, have the skim and key to match the ecm, usually a draw back there
 

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Discussion Starter #4
So not really worth the hassle for the firmer shifts?
 

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Discussion Starter #6
So even after I do the engine swap I should keep my PCM?
 

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yea keep your orginal,, 02 was really the only year that had the firmer shifts, and that was the special only,
 
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