I have a 99 navagator with 5.4 4v and a 4r100 transmission I want to put in a 03 f250 that has 5.4 sohc an 4r100 transmission both are 4wd what kind elect connection problems and is there aftermarket wiring harness available? Thanks for the help

ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#14780 Closed public

Engine an trans swap

Sparky

Assuming the engines and transmissions are the same it could be possible. It requires checking with Hollander or a similar source to see if they are physically interchangeable. They may also provide footnotes for issues you may encounter.  I would cross reference the wiring diagrams for differences. Also check to make sure connector ends match up.  If everything seems to line up always use the wiring harness that belongs to the vehicle the engine and transmission are being installed in.

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