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Old 02-09-2008, 02:17 AM   #1
'93Impreza1.8T
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Talking STi Tranny Swap

I have a '93 impreza 1.8L 5spd awd and i want to swap to a sti 6spd awd. will the tranny bolt up to my engine and will it function properly or will i need the ecu from the sti?
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Old 02-09-2008, 09:01 AM   #2
StupidFastWagon
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You might need all the dccd parts, but im sure that you dont need the sti ecu for the tranny to work. Your going to need the the rear diff and a bunch of other little things
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Old 02-09-2008, 10:38 AM   #3
'93Impreza1.8T
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what if i want to swap to a wrx 5spd or is my tranny the same? will my stock cv axles hold up to the torque now that i'm going turbo?
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Old 02-09-2008, 11:29 AM   #4
StupidFastWagon
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Im not really 1000% sure... I would just save and get the STI tranny, its bomb proof :P
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Old 02-09-2008, 01:02 PM   #5
'93Impreza1.8T
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LOL true and i would reallylove to have the 6th gear. i'm also hoping to upgrade to the wrx heads do you know if they would bolt up to an ej18 block and still function properly?
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Old 02-09-2008, 03:58 PM   #6
Scooter Sube
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I'm going to be doing the same thing w/ my '95 Lx...the one thing you will have to watch out for is the speedo cable. According to Zephyr, you can swap your current VSS into the 6sp. By doing that, you can save your cluster. Which is neat.

The only thing i'm not sure of the actual wiring of the tranny. I'll be going from an auto to the 6sp. and an aftermarket DCCD controler (spider or neet) How the stock ecu will like that, no clue? I'm not quite sure how all of that works just yet. But physically, it bolts
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Old 02-09-2008, 08:34 PM   #7
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Quote:
Originally Posted by Scooter Sube View Post
I'm going to be doing the same thing w/ my '95 Lx...the one thing you will have to watch out for is the speedo cable. According to Zephyr, you can swap your current VSS into the 6sp. By doing that, you can save your cluster. Which is neat.

The only thing i'm not sure of the actual wiring of the tranny. I'll be going from an auto to the 6sp. and an aftermarket DCCD controler (spider or neet) How the stock ecu will like that, no clue? I'm not quite sure how all of that works just yet. But physically, it bolts
i don't have a vss i have a speed cable will that make a differance and is it safe to run the 6spd w/o any dccd wired up what is the dccd for?
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Old 02-10-2008, 09:30 PM   #8
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Quote:
Originally Posted by '93Impreza1.8T View Post
i don't have a vss i have a speed cable will that make a differance and is it safe to run the 6spd w/o any dccd wired up what is the dccd for?
its safe but you will be running an open diff.
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Old 02-11-2008, 02:07 AM   #9
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Quote:
Originally Posted by 99WRXEJ20 View Post
its safe but you will be running an open diff.
it's funny i was told that with the dccd disconnected it will be in lock.. but it actually does sometimes feel like it is in an open diff mode...anyhow i've been running entire 06 sti drivetrain flywheel to the ground in my 97 L now for about 4-5 months without any problems at all..hehe other than the fact that the single port ej22 has what feels to be an estimated 80hp to the wheels. but the gearing feels awesome my stock powered L actually tries..and yes you should be able to use your speedo cable into the 6speed the threads are the same as the vss but make sure you have all the little bits at the tranny end of the cable (i forgot what that thing is at the end of the cable.. excuse my illiteracy) and be sure to get plenty of lube on it before you put it back together.. mine was too dry and got hot and broke oh yea forgot to mention my L was an auto and i still haven't fixed the speedo cable...
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Old 02-11-2008, 02:42 AM   #10
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thanks for the help now is anyone selling the complete 6spd drivetrain and i forgaot but it should bolt up to my block right?
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Old 02-11-2008, 05:57 AM   #11
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It should bolt up but i remember seeing somewhere that you have to modd something for the starter... Not sure once again... but Just take your time, dont get frustrated and be ready for some hard work
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Old 02-11-2008, 12:54 PM   #12
'93Impreza1.8T
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thanks
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Old 02-12-2008, 03:06 AM   #13
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yes to my knowledge all ej's have the same bellhousing patern. oh yea..lol... the starter..mine has been with one bolt since(yea i know. not wise. i've been a tech for 9 years strong now) on my single port ej22 the lower starter bolt threaded boss is'nt there noir is an unthreaded boss like most imports one option would be to tap threads into the lower hole on the tranny and use a slightly bigger bolt size.. you would need to enlarge the hole on the starter slightly to accomodate ofcourse... i however opted not to do this to my tranny since i will be throwing in the motor that goes with it very shortly here but i have had no problems with my riggerie so far i don't think tapping threads could harm the tranny unless you get carried away. try not to enlarge the hole any more than neccesary.. i was thinking my ej22 lacked the second threaded hole due to being an auto since my auto tranny had a stud for the second bolt instead of a hole..maybe an original 5spd block will be different.. feel free to p/m me if i may have some usable knowledge...hope this jabbering helps
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Old 06-13-2009, 08:11 PM   #14
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i know that you can bolt up the sti trans to the 2.0 turbo plant but you will need shorter driveshafts, the rearend R180 ..vividracing has a good deal on sti trans packages lile( rear ends, halfshafts, dccd or manual , and brembo rear brakes
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Old 06-29-2009, 03:07 AM   #15
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Hi yea I have the same motor. I have a 1993 impreza wagon L awd. I want to do the same swap or just the wrx motor 5 speed with a turbo. but this is the first subaru i own. So i don't know where to begin. could you let me know what you picked and how much modifications you needed to do.
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Old 07-20-2009, 03:10 PM   #16
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I have a 93 JDM WRX that I am doing the same swap in as well. I believe the STI driveshaft will work as long as you use the 6MT and the R180 with it??????? I have also heard that the speedo cable threads in and works fine. And yes you do need to tap the lower starter bolt hole and put a stud in.

A question is the 05 Hub going to work with our control arms and all that fun stuff. I know you need STI suspension and the swaybars to make the rest work right? Is there no write up kicking around for a STi Drivetrain into a GC8??????
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Old 07-21-2009, 09:59 AM   #17
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i have not put a 6mt in a GC car, but i just got dont putting one in a 88 GL wagon with an EJ20G engine in it.

if you have a phase one engine you will only have 4 bell housing bolts, the phase 2 blocks have 6 bellhousing bolts. one of the extra 2 bolts go through the starter into the block.

if you are bolting a Phase 2 trans (this would be all 6MT's) you will just leave the two bolts on the sides out. and you will have to tap the lower starter hole in the trans. this will allow you to have two bolts in your starter. i would not run it with one.

as for the speedo cable. im sure the GC cable will work just fine, when i had a 96STI 5MT in my car, the stock 88 cable worked just fine. and now that i have the 6MT it works just fine also.

your axles will also work in the front as long as you have 25 spline shafts, (pre 2004.5 trans) after that they changed shafts and went to a male shaft end. thus you will have to use the new style shafts...

the trans will work just fine with out wiring anything up to it. there are three sets of wires on the trans. DCCD wires, backup light wires, and Netral switch wires. i ran mine with none of them hooked up and it worked just fine, now i have the DCCD wires being used by my DCCDPro controler.

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