Finishing my 5.4 build and looking for a torque converter. I am mating the engine to the stock 4R70E. Stock engine was a 4.6 and while ive heard i can use the tq converter from that, it may be fun but will eventually destroy the 4r70e. Also i dont have the original 5.4 tq converter.
This area is where i have very limited knowledge lol. Id like something that multiplies the torque a little but not like 4.6 tq converter. Can anyone please point me in the right direction or have any suggestions?

More about the build in case that matters, should have a little more power than stock lol
5.4 2v swap
bored .030 over
10.37:1 compression
cai
75mm tb
long tube headers
mild port and polish

 

I would be surprised if there's any difference between the converters

 

Took this from another forum
If you swap a 5.4 into a 4.6 engine bay and use the 4.6 converter you will multiply the 5.4's torque at a higher rate and at a higher stall speed which will put the torque at the transmission input shaft close to the limit if not over the limit of the 4R70W. The 99+ 5.4 produces 350 ft/lbs of torque. 90% of that is available at 2000 rpm. The stall speed of the 4.6 is above the 2000 rpm range so more than 90% is available. 350 ft/lbs x 2.3(4.6 multiplier) x 90% is 724.5 ft/lbs.

Whats everybody else running? Anyone used the 4.6 converter on a 5.4 swap?