Help please.

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Oct 27, 2019 | 11:20 PM

Brylor1991

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Joined: Oct 2019

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Help please.

So I have a cracked piston in my 92 f150 with a 4.9. Found a motor I'm thinking of buying and it's a 4.9 but has a manual transmission. My question is what will I need to do to put the new motor in my automatic truck. Have never done this before.

Oct 28, 2019 | 08:45 AM

Mjollnir81

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Joined: Oct 2019

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From: Tennessee

swap the manual flywheel for the automatic flexplate, and it should bolt right up. I can't 100% confirm that the crankshaft bolt patterns are the same for automatic and manual (in the past they were all the same-newer engines not so much). Otherwise it should work the same.

Oct 28, 2019 | 11:10 AM

pmuller

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Swap the starter along with the flex plate.
The starter for the manual flywheel has a different reach than the starter for the automatic flexplate.

Oct 28, 2019 | 01:29 PM

The Frenchtown Flyer

Fleet Mechanic

Joined: Nov 2002

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Remove the pilot bearing from the rear of the crankshaft. With an automatic it is not used. There are youtube videos on how to do this.

Oct 29, 2019 | 10:59 AM

FuzzFace2

FTE Legend

Joined: Nov 2015

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From: Angier, NC

Quote:

Originally Posted by pmuller

Swap the starter along with the flex plate.
The starter for the manual flywheel has a different reach than the starter for the automatic flexplate.

why?
If he has an auto and he takes his flex plate and bolts it to the new motor he does not need to do anything with the starter.

Quote:

Originally Posted by The Frenchtown Flyer

Remove the pilot bearing from the rear of the crankshaft. With an automatic it is not used. There are youtube videos on how to do this.

Good call as the converter may not go in all the way and an kill the front pump in the trsny.

Check oil pan sump & pickup between the 2 motors and swap as needed.
Dave ----