I have 2002 ford f150 4.6L with 4r70w transmission my part truck is 2000 ford f150 5.4 with the same transmission I know I have to change the ECM and the transmission torque converter from earlier reply I read in the forum I'm using my old transmission so I guess I have to buy a new torque converter? Is there anything else that I need to change like pressure solenoid or pressure switch? Because of the year difference is there any other thing that I have to change on the engine thank you very much for your time.

 

why are you changing the ECM?


do you tow?





if it were me, I'd use the 4.6 converter with a n/a 5.4

 

What he said.

D

 

I read in the forms the transmission torque converter
for 5.4 was different then 4.6 ?

 

I actually heard that the 4.6 converter takes the 5.4 4r70 to it's limits ,, it will work?? I'm thinking of doing a 2001 5.4 Expedition 4r100 too a 5.4 2000 f150 4r70w, I can't afford 2000$ grand for my transmission,, yr2000 was a mess I have YL3p any help an can it be done with a donor

 

Replacing a 4R70W with a 4R100 isn't as easy as you may think. You need a driveshaft, some wiring harnesses, and a different ECU. You also can't use a 2wd trans on a 4wd, or vice versa.

 

Are you swapping ht engine? Transmission? Both? It's not clear.

 

It always gets confusing when someone hijacks a thread.

 

I'm sorry to take forum ,, I'm thinking of doing a DIY ,, I have a 2000 f150, 5.4 4x4, with a 4r70w,, I'm not trying to spend a 1000 on a rebuilt or a used transmission I have no info on,, I can buy a 2001 expedition , which has a 5.4 with a 4r100.. Cheap an I heard the transmission is way better, worth the little bit of work,, from what I see,, I need a harness ,, PCM aka ecu, EEC ,, I also need to custom the drive shafts,, torsion bar,, mayb weld 4 1/2 in on the cross exhaust pipe.. But also I can get a 2x4 same yr transmission but how hard is it to make it a 4x4,, an can I just rebuild my transmission cheaper an can it be done faster then the swap for a guy that never did it before

 

So I jack it this time but its so true i been reading threads in the forums for about 2 months now trying to figure out how to do a similar swap (4.6L engine and transmission to a 5.4L engine and transmission )which i already have sitting but i will not start it because of lack of knowledge which i am trying to educate my self on the forums but they get hi jacked and i keep getting lost in conversation !! ahhh good luck to the original poster of this thread, i will post my own now lol….