I have a 2003 4.6 f150 whit a automatic transmission. What years of 5.4 will fit

 

You will need to snag a torque converted from the 5.4 too but I wouldnt run anything before 99 unless I wanted to pi swap it.

 

so would the newer 5.4s for or just 2003 and under

 

03 to 04 you go from 2V to 3V ...don't think you want to go that route..

 

99-03 will work or a 04 heritage will work but I think all the heritages were 4.6Ls.

Wayne

 

You can also use a 5.4 from a van all the way up to 2008. The Economize fans had 2v's in them. You will just need a the thottle body aND elbow from your existing truck.

 

Here we go with the torque converter crap again....

 

Do you not need it?

 

Yes/no. I'm going to run the 4.6 converter just because the stall speed is a little bit higher than the 5.4. That's what they mean by the torque is multiplied at a higher rate, just like in my racecar I had a 4000 stall which multiplied the torque way higher than the factory converter. It is harder on the transmissions but I also have a spare that's being built for when the transmission goes kapooya.

 

If you do any towing it's better to have a 5.4 converter. Ido about you but a 4.6 converter will stall around 2800. But it will flash to 3500. So any smart person who was looking for reliability would want to swap the converter.