Welcome to the North American Subaru Impreza Owners Club Wednesday July 9, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 10-04-2012, 11:35 AM   #1
avionator
Scooby Newbie
 
Member#: 210482
Join Date: May 2009
Default difference between AT and MT 2.5 engine?

any difference between the engines used in the automatic cars vs stick shift? I need to replace my engine on my 2009 2.5i manual transmission, but i'm mostly finding engines from cars equipped with auto.

Any reason an auto engine wouldn't work on a manual car? Obviously i'd have to switch over the flywheel/clutch... is that possible on an engine from an auto? Or is there something weird...?


thanks!
* Registered users of the site do not see these ads.
avionator is offline   Reply With Quote
Old 10-04-2012, 12:52 PM   #2
chazly413
Scooby Specialist
 
Member#: 151079
Join Date: Jun 2007
Chapter/Region: MAIC
Location: College Park, MD
Vehicle:
2005 2.5RS RBP
motec system exhaust-RIP

Default

I believe the ECU has auto or manual transmission components in it. Basically what I'm saying is that I think the ECU differs slightly from AT to MT engines.
chazly413 is offline   Reply With Quote
Old 10-04-2012, 01:24 PM   #3
GEE-OTTO
Scooby Specialist
 
Member#: 201277
Join Date: Jan 2009
Chapter/Region: MAIC
Location: Arlington VA
Vehicle:
2009 Legacy GT
OBP

Default

Quote:
Originally Posted by avionator View Post
any difference between the engines used in the automatic cars vs stick shift? I need to replace my engine on my 2009 2.5i manual transmission, but i'm mostly finding engines from cars equipped with auto.

Any reason an auto engine wouldn't work on a manual car? Obviously i'd have to switch over the flywheel/clutch... is that possible on an engine from an auto? Or is there something weird...?


thanks!
Difference in idle speeds by the ECU and the TCUs are obviously different. Also you would need to use a manual flywheel. as long as your ECU plays with that engine it will control it as programmed auto/manual isnt a factor
GEE-OTTO is offline   Reply With Quote
Old 10-04-2012, 05:36 PM   #4
avionator
Scooby Newbie
 
Member#: 210482
Join Date: May 2009
Default

Quote:
Originally Posted by GEE-OTTO View Post
Difference in idle speeds by the ECU and the TCUs are obviously different. Also you would need to use a manual flywheel. as long as your ECU plays with that engine it will control it as programmed auto/manual isnt a factor
any reason why my ECU from my manual wouldn't get a long with an engine from an auto? I'd be replacing with an engine from the same generation, and no turbo or any other changes. swapping the flywheel from my engine to the other engine shouldn't be a huge deal, right?
avionator is offline   Reply With Quote
Old 10-04-2012, 05:56 PM   #5
4doors4hp
Scooby Newbie
 
Member#: 331791
Join Date: Sep 2012
Default

thats a weird question.. maybe try finding a manual ecu?
4doors4hp is offline   Reply With Quote
Old 10-04-2012, 06:56 PM   #6
yarrgh
Scooby Specialist
 
Member#: 80465
Join Date: Jan 2005
Chapter/Region: RMIC
Location: Aurora, CO
Vehicle:
2001 2.5RS
Black Diamond Pearl

Default

He has one. His car is a manual. He's asking if an engine from an auto car will work w/his manual car. The only difference I know of (beside the flywheel) is the timing belt guide. Auto's don't have them, manuals need them. It's a small piece that bolts to the oil pump so the timing belt won't jump teeth in the event that the engine spins backwards.

You'd have to inspect the engine harness connections to make sure that they will jive with your chassis harness.
yarrgh is offline   Reply With Quote
Old 10-04-2012, 07:55 PM   #7
avionator
Scooby Newbie
 
Member#: 210482
Join Date: May 2009
Default

Quote:
Originally Posted by yarrgh View Post
...The only difference I know of (beside the flywheel) is the timing belt guide. Auto's don't have them, manuals need them. It's a small piece that bolts to the oil pump so the timing belt won't jump teeth in the event that the engine spins backwards.

You'd have to inspect the engine harness connections to make sure that they will jive with your chassis harness.
huh, definitely didn't know that! that's a VERY helpful thing to know. also, it would SUCK to order an engine and then notice the harness is different. i'll be calling somebody who deals with subies to find out. I'll post the answer when i get it.
avionator is offline   Reply With Quote
Old 02-26-2013, 06:41 PM   #8
07Scuby
Scooby Newbie
 
Member#: 293000
Join Date: Aug 2011
Default

Just wondering if there were any issues with your swap. I'm going thru a 09 auto into a 07 manual now. If I need harness swap would like to know before hand. Thanks
07Scuby is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 10:31 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.