im doing a 4.6 to 5.4 swap and have read that i cant use the 4.6 converter, and im wondering if i should get a 5.4 one out of a salvage yard or just get a reman unit. the question is that the remans say the the fit both the 4.6 and 5.4 but have the option for low stall or high stall witch is the right one?

 

What reason have you been given as to why you can't use the 4.6 converter?

Darrin

 

hm the only reason I can think of right now would be if you have a romeo build 4.6, then I think you have to change the flexplate. Have you searched any on here for the JMC write up?

 

different stall speed and will put to much torque through the trans

this is where the info came from https://www.f150online.com/forums/tr...ml#post3570245

the 4.6 i pulled out has the 8 bolt flexplate and same converter bolt pattern as the 5.4 flex plate the i have

 

What year parts are we dealing with here? Years for everything if you can please.

Darrin

 

as far as i know the 4.6 and trans are the original 98 pieces

the 5.4 that is going in is a 03

 

well i was hoping to hear back from darrin before i put my truck together but i did call a local trans guy who came highly recommended and he said i should be fine and that the bolt 4.6 came with the same converter as the 5.4

 

hey I ran the 4.6 converter with the 5.4 lightning. it had 196k on the trans and it took another 2k miles before that motor finished the clutches.

 

Oops, sorry. I thought I replied but I have been so darn busy with getting everything in order to move the shop that I guess I just thought about it instead of doing it.

Yeah, from that year 4.6, that is fine to use it.

Darrin

 

thanks Darrin thats what i wanted to hear and from everything that i read u were the man to hear it from