[john bertges]

i work for ford all econolines and f150 with a 5.4 liter use a 4r70w/4r75e trans the same as a crown vic if towning with a open trailer you should have no problems but i would install a transgo shift kit

and as for torque shift 5 speed to a 7.3l will not work but the new 6 speed torque shift will it has a sae bell and its own trans control module the adaptor on the back of the 7.3 will need to be replaced with a 7.3l from a f650/750 they had a allison trans i am collecting parts will try for future project