Swapping Motors

[jcoop1123]

I have 97 F350 7.3 Auto with a broken crank. I also have a 97 F350 5sp with a good motor. I was thinking of pulling the 5sp motor and putting it in my auto. Is this a direct drop in? what electronics/wiring will I need from my auto.

I have a cummins that I will eventually put in the manual. Any help is appreciated.

[96whitestroker]

wana sell taht cummins?

[alberta 7.3]

Provided both trucks are federal emissions, it'll be a direct bolt-in. If one truck has california emission spec, you'll have to swap the injectors. Otherwise, leave computers, etc alone, just disconnect the engine harness at the connector by the master cylinder.

[pjwoolw]

I remember something about a spacer on the auto or the 5 speed. On the crank? IIRC. Anyway something to do with the tranny / flywheel / flexplate.

[alberta 7.3]

Yes, I think there is a spacer on the auto, but it is independent of the crank.

[pjwoolw]

I remember it was left out of a first attempt tranny install. Thanks for jogging my memory!

[elibenson]

Also, pull out the pilot bearing before you try to install your auto tranny.

[alberta 7.3]

Originally Posted by elibenson

Also, pull out the pilot bearing before you try to install your auto tranny.

Pilot bearing is in the flywheel, not the crank.

[elibenson]

Originally Posted by alberta 7.3

Pilot bearing is in the flywheel, not the crank.

Good to know. I was thinking in terms chevorlet gasoline engines. On those, the pilot bearing is in the end of the crank, and can really ruin your day when you put on a flex plate and torque converter. It tends to deform the flex plate, and jam the starter. It can also split the transmission housing. It goes down hill from there..

On Fords, I have only worked on the 4R100 and E4OD transmissions, so I don't have any experience taking apart the manual ones.