I understand there be alot no Sayer first of all that's fine let it rip. I have 2000 f350 purchased new with 5.4 auto transmission. Blew first motor up at 88000 second up at 134000 and third at 176000, yes I work em my truck is loaded all the time. I have and old 95 f350 with 7.5 I fall back on each time I kill the 5.4 waiting on new crate motor. So while down for winter decided put 7.5 in place of 5.4 other than fab new mounts and drilling and tapping two holes for tranny see anything I'm missing?

 

Engine/transmission computer?!? How are you going to get it all to mesh and make it run?

 

Good question I have not give that much thought, the fuel injection 7.5 seem to have simple wire harness to computer so swap to 7.5 after removing 5.4 harness and computer. Transmission on other hand maybe change over to stand alone.? Any thoughts?

 

The trucks and engines are from two different generations of computer controls. Not only do you have to figure out how to make the engine and transmission mesh together, but there are so many more things on the newer truck that are computer controlled, compared to the older one.

I get your thinking on making a truck work with what you have, but my opinion would be to sell them both for what you can get and buy a newer, super duty that would hold up to the needs you have.

 

I think this is going to be much more complicated than you think. As stated before, the computer control systems aren't compatible. The instrument cluster needs to talk to the PCM, which needs to talk to the transmission. The PCM also needs to talk with the BCM.

The PCM that operates your 5.4L V8 isn't compatible with all your other modules. You'd likely have to strip the donor truck of its transmission, PCM, and possibly some body modules and find a way to get it to work in your '00. Lots of wiring, and I don't think you'd ever get things running right. @Mark Kovalsky may have some advice on transmission compatibility...the 4R100 in your '00 is closely related to the E4OD in your '95, so you may be able to avoid swapping the transmission.

 

88000
134000= 46000
178000= 44000

I hope #2 and #3 engines were not New one's.

2 or 4 wheel drive...?? driveshafts... may need changed or custom.
wiring diagrams .. not so easy to find. both trucks.. and are you good at reading/understanding them.. as connectors most likely will not match.

easier/maybe cheaper to replace engine again.. and you will be without any Truck till you get one up and running again.

upgrade to newer truck... look into used fleet/lease with records..
I did, 4 year old truck with 135,000 miles and 4,100 hours.. under 40 percent of a new one.

yes, its plain jane.. but Works well.

 

There is more at play here than "it's always loaded". I'm beginning to question if it was even taken care of.

We have a 99 F350 DRW with an 11' service body, always loaded with tools, welder, and a compressor, and usually pulling 14k. It's 2wd, 5.4 and currently has 219k on it. The truck itself weighs almost 11k loaded.

It gets serviced to the severe service schedule, and it's never had an issue. Were these Genuine Ford Motorcraft motors or used?

 

You'd be better off swapping in a 6.8 instead of trying to cobble #### an older 460.

I question how were the 5.4 engine(s) maintained.

 

The 5.4 should last a lot longer than that. Something strange going on. You could get a 2011 used 6.2 for maybe 15k. I would look into that.

 

The issue is why he's blowing up motors so often

 

I think you have to do a lot more than drill and tap two holes to mount the trans. I think you need a different bolt pattern on the trans. I've heard that the diesel 7.3L and the 460 can be swapped by drilling some holes, but the 5.4L has a much different pattern. I don't think it is possible to mount it to a 460.

A stand alone trans controller is probably the easiest way to make this work, assuming you get a trans that will mate to a 460.

 

Do you run your truck without an air cleaner or never change the oil? That motor will last 300k if you maintain it well. You are definitely doing something wrong. Putting a 460 in will be a pita or impossible. Get another 5.4 or get a newer truck.

 

My trucks are serviced on regular intervals as close to 3000 miles possible. The true point is the 2 valve 5.4 has a huge failure rate and the 3 valves also in f350 trucks. There very under powered and rap high rpms, if any of you guys cross I 80 in Wyoming a few times you will understand flat on floor locked in second trying to maintain 30mph in the pulls. The 6.8 is also a thought also checking on end of lease trucks, everyone i know have had problems with ever make of late models one tons thanks for all your input I believe this is still possible and some great points have been made and my research continues thanks to all

 

It's your truck, so you should be happy with it. Good luck with your swap, and please let us know how it goes.

 

I agree that using a 5.4 in anything bigger than a F150 is sending a boy out to do a man's job.

You'd be money ahead to buy a F350 with the right engine, transmission etc and putting the service body on it. Go through it all to make sure its up to the job.