alright we i'm picking up my 5.4 tomorrow, and have a few questions. Right now i have a 2001 f150 4x4 4.6 so i have the 4r70w, what will i have to do to make my 4r70w work with the 5.4? Also what else major will i have to change? I read most of the tech articles so i think i'm up for it but if anyone has any tips for me feel free please! thanks chris

 

Start here:https://www.f150online.com/forums/ar...wap-notes.html

Good luck.

 

get a custom tune and follow the advice pointed out to you by ONELOWF

 

(Special note about the different automatic transmissions and their respective harnesses. You cannot run a 4R100 transmission with a PCM that had a 4R70W transmission and vice versa. The transmission harnesses are different and will not plug into the different engine bay harness. The control functions in the PCM are not compatible so the transmission will not function properly.)

so, does this mean that if my 5.4 that i'm buying came from a car with a 4r100 that it will not work with the 4r70w that i have in my truck? or can i get it to work without swapping trannys

 

you can run your 4.6 ECm and 4r70 with a 5.4 you just need the custom tune to get the most out of the 5.4 since the parameters are still set for the smaller motor

 

one other question can i use the torque converter off my 4.6 for the 5.4?

 

BUMP please help!!!

 

can, yes. it bolts up. now the question of if you'd really want to. i believe the later years of the trucks with a 5.4 and 4r70w/4r75 used a different converter. something about the earlier years design comes to mind, i think jmc once posted the ratio of the 4.6 tq converter and it was much higher than the 5.4's. i think this may have been a concern for my type of application and not a n/a application though.

 

the 4.6 torque converter has a higher ratio just as Klitch said and JMC posted the ratio's in his notes...


there is a guy who using a 4.6 converter behind his N/A 5.4 and he said the power is awsome... I wouldn't do it unless I had helped the tranny out witha valve body at the bare minimum

 

so with a stock 5.4 with the 4.6 torque converter will i blow my 4r70w

 

so a few more questions, first one is the oil filter bracket is different on my 5.4, its not in the same place which i didnt think was a big deal but it also has 2 hose's come out of it which i dont know what they go to? anyone? and the second thing is my 4.6 and 5.6 both have the COP set up the only difference that i can tell between the to are that on the backside of the 5.4 harness there are ( what it looks like 2 more 02 sensors ) and also there and also 2 bigger plugs ( like 12 pin plugs ) that i dont know what they go to? so if anyonw has any info please get back to me asap! thanks chris

 

the converter wont help things, the ratio was a serious difference. i believe it was something around 2.1 x for the 4.6 conv, and 1.7 or so for the 5.4 conv. enough that my 4r70w with the 4.6 conv and my 450+ fwhp motor would "feel" but not output almost 1000ft/lbs or something like that. you need to read jmc's post, i dont want to mislead you.

if there is hoses coming from the oil filter housing, its a remote location filter that sits behind the bumper, right in front of the front body mount.

please take pictures or describe wire color of those plugs. the 12 pin connector sounds like the other 2 main connections. again contact JMC on this, he's the resident guru on the wiring swap.

 

alright, well i started my 5.4 swap a few days ago and i feel like i'm almost done but of course i have ran into some problems, first off i'll start my saying that i used my 4.6 harness

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ok this is off my 4.6 lower intake manifold, what is this plug? i dont have one on my 5.4 intake manifold, and it seems like it might be kinda important, here are some more pictures of it

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the next thing i have a question about is this plug i dont know what it is and i dont think that i have a plug for it, i have a plug that i thought was the right one for it but it does not match up?
here is a picture of that plug

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and this is the plug that i thought was the right match but it doesnt line up, this little grooves on the side of the plug are different

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oh and also this is the plug that went to the plug on my lower intake manifod ( the first picture )

so if anyone has any info about this please please please help thanks chris

 

I'll try.

The gizmo in the first pic is controlled by the PCM to blend the air in lower plenum under different load conditions. I would keep it. It can be deleted, or not connected, but it has to be shut off in the tune. The plug from the wiring harness will have two plugs at that end, possibly at the end of the left side injector wiring?? The other plug on that end will go to the CHT on the back of # 5 cylinder. The CHT can be deleted as well, and shut off in the tune, I have been told, but it is not recommended.

The next pic is the gauge plug for ECT. There will be a pair of plugs on the end of this harness as well. One is for the coolant temp for the PCM, the other is for coolant temp to the dash gauge. They are different sensors and plugs. The one you have circled will be the last plug on that line.

I believe the last two photos are of the CHT which should have been plugged in before the manifold was set on. It may still be accessible. Yours will look a little different.

Here's the best pic I can find:

 

the CHT is accessible, i was able to install the sensor with the intake manifold on. i do have smaller hands than his from the looks of it.

the ECT, you may have to lengthen wires.. use your original sensor too. i know if you have a 97 4.6 truck, (i forgot your year) you'll need to tap a spot for the ECT idiot gauge i believe, either way u have the real ect and the idiot gauge in the same area.