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automatic b5 sedan passat 2.8l v6 syncro
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At the moment I am seriously considering to swap my 2.0l naturally aspirated 8v ohc (AZM) to the bigger 2.8l V6 DOHC 30V (AMX). And the question is how much parts I must change to make it possible. Can I use the same automatic transmission and wiring or do i have to change them all. Thank you
 

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The transmission should be fine, but you would need to change the complete engine wiring harness and ECM.
Also the exhaust system and front suspension springs, and a number of other items.
 

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If you change the ECM, you will most likely have to change the TCM as signals have to sync. That may also require a new harness? My guess is yes. Most such computer systems do. You will need the matching rad, rad support, hoses, and since the power steering is positioned differently, that unit, and it’s plumbings. The alternator will have to match its new location as well as the starter.
 
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