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Guest Message by DevFuse

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ej22e and ej25d flexplate/TC different?

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6 replies to this topic

#1 MilesFox


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Posted 26 September 2013 - 09:40 PM

I am swapping a frankenmotor into a forester. The frakenmotor was from a 95 legacy with a 97 outback block, ej22e heads original to the 95.


I am swapping this into a 98 forester ej25d.


Should i be swapping flex plates around? I cannot remember if the frankenmotor is using its original flex plate or the one form the ej25. the car's original ej22 block(bad wrist) is missing the flex plate.


I can drop this motor in right away if i don;t have to swap anything.


Is there an advantage using one torque convertoer over the other (stall speeds)?


both vehicles are 4eat automatic

#2 idosubaru


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Posted 26 September 2013 - 10:00 PM

if you've got both there it'll be obvious if you compare how it bolts to block and bolts to trans, one drives it.

been a little while but flexplate stays with the trans - so typically - install EJ25 flexplate on EJ22engine going into EJ25 vehicle.


i'm a little confused as you said:

"the car's original EJ22" - makes it sound like it already had an EJ22

"I am swapping this into a 98 forester EJ25D" makes it sound like it had an EJ25


sorry, typing is what it is.

Edited by grossgary, 26 September 2013 - 10:02 PM.

#3 MilesFox


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Posted 26 September 2013 - 10:23 PM

Let me rephrase:


The donor engine(frankenmotor) is an ej25d(97 ob) block with ej22e heads. It was bolted to the 4eat trans in the 95 legacy. the 95 has its original torque converter. I cannot remember if the flexplate is original to the trans. the original ej22 lump is missing its flex plate. I can assume this is swapped to the frankenmotor. The 97 ob block may not have had a flex plate, i don't recall.


This engine is going into a 98 forester that has an ej25d, 4eat. The original TC is with the trans.


So i am wondering if i need to bother with swapping flex plates, or if the one mated to the 95 with a 2.2 originally as it is still on the donor engine, or if different between ej22 and ej25, would there be an advantage to swap the TC from the 2.2 to the 2.5 regarding stall speeds?


I hope this clarifies. I would rather not remove the flex plate on the donor engine as the separator plate has already been serviced. I just want to drop it in the forester once it comes out of the legacy.

#4 WoodsWagon


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Posted 26 September 2013 - 11:23 PM

So the EJ25 block was bolted to the 95 EJ22 transmission? Most likely it had the 2.2l flexplate bolted to it.


2.2l torque converter is smaller, so it uses a "deep dish" flexplate.

2.5l torque converter is bigger, so it uses a flatter flexplate. Put the 2.5l flexplate with a 2.2l converter and it will pull the converter back too far out of the trans. Put the 2.2l flexplate with a 2.5l torque converter and the bellhousing won't pull together that last 1/2".


So if you're trying to put it on a 2.5l trans with the big converter, you will quickly find out if it will slide together, meaning it has the right flexplate, or if it stands off a 1/2", which means it has the 2.2l flexplate. If so, I'd swap across the 2.5l flexplate but that's just because I like to keep the TC with the trans.

#5 MilesFox


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Posted 27 September 2013 - 12:54 PM

Is there an advantage using the 2.2 TC in the 2.5 trans with stall speed? Otherwise i will be swapping flexplates.

#6 johnceggleston


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Posted 27 September 2013 - 06:08 PM

the simple answer is,

the flex plate MUST match the trans / torque converter.


the engine is a non-issue.


and i cannot think of a good reason to mix and match a TC and trans.

#7 MilesFox


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Posted 28 September 2013 - 08:07 AM

I ended up swappign the flecx plates. But i had to remove the engine from the stand to get the part, not too much work to wrangle around. I did not want to make any mess with removing the torque converters. The engine is bolted in and ready to go. 

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