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Need some transmission swap info in order to save my Leggy!!
Posted: Tue Aug 30, 2011 5:43 pm
by soobrdad02
Hey everyone, I just wanted to find out if I could use a '99 4EAT n/a transmission to replace the currently non-working one in my '91 4EAT n/a transmission. I need to know if it'll be a direct bolt-up, or if I'll need additional parts to make it work. I don't know the gear ratio on the '99 yet and wanted to know if this would be a plausible swap. Any help would be GREATLY appreciated, THANKS!!!
Re: Need some transmission swap info in order to save my Leg
Posted: Tue Aug 30, 2011 5:52 pm
by Legacy777
Unfortunately the 99 4EAT will not work with your 91 car. Around 97 or so Subaru changed the 4EAT. There is a phase 1 and phase 2 transmission. They have different internals and different electronics/sensors. The electrical plugs are different and will not mate together.
Check out this post for some more info.
http://bbs.legacycentral.org/viewtopic. ... 75#p362275
Re: Need some transmission swap info in order to save my Leg
Posted: Tue Aug 30, 2011 8:11 pm
by soobrdad02
Darn! So even if the FDR matched up, the electronics would kill me? Grrrrr... Any ideas as far as years that I could go with(aside, of course, from 90-94)? Again, thanks in advance everyone!
Re: Need some transmission swap info in order to save my Leg
Posted: Wed Aug 31, 2011 5:21 pm
by Legacy777
I think it was around 97 when they changed to the phase 2 4EAT. So I'd look for transmissions before that.....keeping in mind you still need the FD ratio to match.