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Interested in swapping your 4.6 to a 5.4? This thread lists several problems you may run in to. The most common are:
Read the full discussion below to find out how to deal with the common issues.
Read the full discussion below to find out how to deal with the common issues.
4.6 to 5.4 Swap Notes
#46
#49
So I wouldn't need the 5.4 computer? Just use everything that I have. So it would just be a plug and drive engine swap. What about the tranny it would be fine with the 5.4? Thanks
#51
#54
#56
Join Date: Dec 1997
Location: Windsor,Ontario,Canada
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Do you have access to all of the wire harnesses from the wrecked truck? The 2004 4.6 computer does not have 3 valves so it is not set up to control the added functions of a 3 valve engine. You will need the 05 PCM to do this along with the harness. Mechanically it will bolt right in. If you change PCMs then you must have it programmed to the PATS keys of the 2004 truck. There are 3 connectors on the PCM. 175E for engine control. 175T for transmission control and 175B for the rest. I cannot say for sure that the 05 PCM will function with the other two connectors. Odds are that it will but you will have to figure that out yourself. I would recommend checking the 2004 4.6 transmission and body pinouts to the 2005 5.4 transmission and body pinouts.
Regards
Jean Marc Chartier
Regards
Jean Marc Chartier
#57
Yes, I am looking at purchasing the entire complete wrecked 2005 F150 truck (same body style as my 2004 F150 ) with 5.4. Truck runs but left front is crunched. I was hoping to remove motor, tranny complete as a unit with wiring harness and reinstall into my truck. Dont want to do alot of mods if I can help it??? Do you think it can be done fairly easy??
Many Thanks
Jeff Riggins
Many Thanks
Jeff Riggins
#58
Hey guys new to the site and I just got an f-150 4x4 with a bad 4.6 so im looking to do a 5.4 swap . I have found a 2000 5.4 for 1100 local with 90k and a 6mo warrenty .If you guys know of a better deal let me know . The truck has a 5 speed i plan to tow my mustang street strip car with it . Im sure it needs a new clutch and I want a heavy duty unit . Is there a set up you guys are using ? Are the mustang clutches the same ? Oh and thanks for the swap notes there going to be very helpful .
Jason
Jason
#59
since the topic is still going....
I have a 97 4.6 4X4, that is pretty tired. I would like to change to a 5.4. Sounds like my tranny will work.
Question is...up to what year of 5.4 can I use? I think even the two valve up'd the HP in later years. AND, I assume that the donar 5.4 can come from any vehicle?
Thanks all!
Wayne
I have a 97 4.6 4X4, that is pretty tired. I would like to change to a 5.4. Sounds like my tranny will work.
Question is...up to what year of 5.4 can I use? I think even the two valve up'd the HP in later years. AND, I assume that the donar 5.4 can come from any vehicle?
Thanks all!
Wayne