1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

se trans on a 12a

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Old 10-08-06, 09:38 PM
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se trans on a 12a

i have someone interested in my se trans and wondering what is needed or if its even possible to bolts the s3 trans on a 12a motor. i did search but nothing came up.
Old 10-08-06, 09:51 PM
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Very possible. I'm honestly not sure if they are even different at all
Old 10-08-06, 09:56 PM
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the flywheels dont look it, im not sure if the starters are different
Old 10-08-06, 10:09 PM
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I know it bolts up. Not sure about the flywheels. Someone with a little more experience with an SE trans should chime in
Old 10-08-06, 10:10 PM
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the only difference is a taller 5th gear. and as far as i know it will interchange with any s3 transmission.
Old 10-08-06, 10:13 PM
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ok thanks. had to be sure.


(good to see another arkansas here)
Old 10-08-06, 11:08 PM
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they are the same trans gear casings and bellhousings for all FB's manual transmissions. as stated above the only difference is the taller fifth gear ratio. the starters are interchangeable. the flywheels and counterweights are different though, however you can use the same clutch on any 12A-13B non turbo from 83-92.
Old 10-08-06, 11:13 PM
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well i think he just wants a direct swap so ill tell him what was said in this thread.
Old 10-08-06, 11:55 PM
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to be more exact the SE has a 0.758 5th gear ratio versus 0.807 on the other models
Old 10-09-06, 11:38 AM
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it is a direct swap for sure. speedo cable, wires, driveshaft, and everything.
only difference is the taller 5th gear, a vent on the side, and perhaps the speedo gear for the 14in wheels on the se.
i have a 12a tranny im about to throw in my se, the black one out of the 2 i got a while ago. the po trashed both the trannys by filling them with atf. dude also rounded like every bolt using standard sized tools.

Last edited by Midwest 7's; 10-09-06 at 11:41 AM.
Old 10-09-06, 11:46 AM
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some people dont deserve the cars they drive. sounds like that p/o was one of them.
Old 10-09-06, 11:51 AM
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Originally Posted by mazdaverx713b
some people dont deserve the cars they drive. sounds like that p/o was one of them.
he had boxes of parts, extra motors, a bunch of auto trans.
his idea was to make a flying car. seriously.
i had to listen all about it when i was getting the 2 cars and all the xtra stuff, lol.
Old 10-09-06, 12:39 PM
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what a nutball. thats hilarious, lol. glad you rescued those 7's from a nasty fate.
Old 10-09-06, 01:54 PM
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Originally Posted by razorback
ok thanks. had to be sure.


(good to see another arkansas here)
likewise

Originally Posted by Midwest 7's
...his idea was to make a flying car. seriously...
Flying car FTW!!!!!!!!!!!!
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