Swaping a 4.0 engine flex plate for a flywheel

bobsxlch

bobsxlch

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Can you just remove a flex plate from a 4.0 engine and put a flywheel on it so I can bolt up a manual transmission to it?
 
Jerry Bransford said:
Yes a flywheel will just bolt up but as above you'll also need to install a pilot bearing for the manual transmission's input shaft.
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I was just saying I'm doing a complete rebuild and putting a new crank in, so I should be good.... Thanks for the feedback
 
A pilot bearing is something not installed in an engine bolted up to an automatic tranny. I doubt a machine shop is going to install one for you unless you specify.
 
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Dis'un

IMG00191-20100902-1840.jpg
 
It's pretty straight forward. Just look at the pic above and compare to what you get from the shop. If it's not there, tap over in and bolt up your flywheel.
 
Some of the 4.0 autos more specifically the 42RLE have a bushing in the crank that will have to be removed to go manual.
 
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SkylinesSuck said:
It's pretty straight forward. Just look at the pic above and compare to what you get from the shop. If it's not there, tap over in and bolt up your flywheel.
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Would it be the same pilot bushing any 4.0 manual would use, or something custom to make a 4.0 automatic motor work in a manual jeep.

(I'm doing this in an '88 Comanche that is already manual, but the replacement engine is from an automatic)

Thanks
 
loveevan said:
Would it be the same pilot bushing any 4.0 manual would use, or something custom to make a 4.0 automatic motor work in a manual jeep.
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It should be the same, but don't forget about the large bushing that holds the pilot bearing too.
 
mrblaine said:
I've never seen a difference in any of them that work in the TJ 4.0 crank. Which ones are different because I'm missing something?
View attachment 528128
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Older ax15s use a different size pilot bearing.i don't know much about the peugot transmissions except to avoid them.It is an 88 commanche,not a tj.

As a side note the 258/4.2l has a different size recess in the back of the crank so the spacer must come from an amc v8 to adapt to a newer ax15 if i remember right. I should have been much better about recording part numbers with my stroker
 
Rickyd said:
Older ax15s use a different size pilot bearing.i don't know much about the peugot transmissions except to avoid them.It is an 88 commanche,not a tj.

As a side note the 258/4.2l has a different size recess in the back of the crank so the spacer must come from an amc v8 to adapt to a newer ax15 if i remember right. I should have been much better about recording part numbers with my stroker
Click to expand...

So it only matters if we aren't doing TJ stuff.
 
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