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2004 WRB WRX Wagon
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514 Posts
I pieced my manual swap together myself, and did the work with a friend. All in all i was in it roughly $1700 even with a oem clutch.
 

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1997 Impreza Wagon
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69 Posts
I spent roughly $500 on the swap itself, but I also got the trans, axles, shifter bushings, pedals, and diff for free. I would say it could cost up to $2,000 for everything at the most if you can't find any deals. Try to find any cars that might be wrecked or parting out and get it as a bundle, you'll save a ton of money
 

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44 Posts
Gahhh this speedo/vss wiring is going to be the death of me. So much misinformation on here has me hesitant to hook up anything.
 

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'00 RS / V5 STI
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570 Posts
I pieced my manual swap together myself, and did the work with a friend. All in all i was in it roughly $1700 even with a oem clutch.
I got it done for $1000 - I bought a wrecked RS and stripped it, then mounted everything up.

I guess $1200 if you count fluids all around and bushings.

Then again, I sold the auto tranny, other motor, and other misc. parts over the course of a year or two and probably made money on the conversion. If you have the room, and come across a wrecked RS, it's worth the hassle in my opinion.

Same goes with everyone having issues with the pinout. If you swap the main harness you end up with a fully functioning car - no 2000RPM idle, no weird stuttering or the ECU being put into limp mode - it all just works.

But to each their own. I appreciate people doing the hard work of trudging through the electrical gremlins to respond back to people here. We need this kind of community to enable new owners.

-TC
 

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'00 2.5 rs sedan
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45 Posts
Now for some more wire housekeeping, now if you return to your shifter area you will notice your funny little shifter wiring, ** due to me have lost the pictures I'll be blunt and explain till I get the visuals up** here you have 4 wires on one clip and two on the other, the 2 others light up an indicator to help you figure out what mode you are in, when its dark, its useless. the other 4 have a great purpose, 2 control a locking motor to keep you from exiting park wile the car is off and the other two dictate that it IS indeed in park, (this allows two things, ONE it allows you to take your key out, and two, it turns the fuel pump on, which is kinda important!), the simple mans way of doing it would simply be to take the two that activate the switch (easily known as the ones that DON'T go to the locking motor) and splice them together and retain the clip and plug it into the shifter harness and toss the shifter.
1)Can you list the colors of the wires you're refering to?
2)what do you mean "retain the clip and plug it into the shifter harness and toss the shifter? and how do you know which two activate the switch?
4)to trick the computer to thinking the key is out, the wires to splice/connect together are blue+black or black+black? Ive read both in this thread.
5)does splicing these wires from question 4 allow the starter to start the vehicle? I dont need the clutch switch hooked up
6)still clueless about how to get reverse lights to work? wire colors/location to splice would help.
7)can I swap over the auto VSS into the MT or do I need to use the MT VSS? would the auto harness plug right into the MT VSS?
 

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99 2.5rs Coupe
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1 Posts
Can someone please help me, i'm a little lost with all the information on the VSS issue.
i currently have a 02RS 5MT in my 99RS. i keep getting CEL 0500 , anyone have pictures or links of the rewiring of the sensor to the automatic harness, i see some are saying i have to get a VSS that matches my cluster, any info would be appreciated
 

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'00 2.5 rs sedan
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45 Posts
racerx7, I havent dont it myself (still working on it) but from what Ive read you just unscrew the vss from the auto trans and screww it right into the manual trans. I believe it should plug right into the harness but like I said, havent got that far on my swap yet.

still have a few questions...
1)for NSS, ive heard many conflicting and contradicting statements. can I just bridge pin 11 and 12 from the grey plug on the harness that goes to the tranny inhibitor pig tail? or do I run wires straight from 11 & 12 to the actual physical NSS on the manual trans? I dont care about utilizing the clutch safety switch to start the car so if I can make it easier by not using that I will.

2)also read something about wiring to pin 82 on ecu and then to ground...this is so confusing because nobody explains it very clearly.

my car just needs to drive to the shop to get the motor swap. I dont need anything to work correctly...just to work.
 

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13 Posts
Cost for my swap: roughly $750 (which is more than I paid for my forester shell :( )+a good EJ25 short block. A buddy of mine had a 2.5RS parts car that I took the pedal set, trans that was popping out of fifth on the freeway, shifter assembly driveshaft (which was brand new from Subaru), and limited slip rear end from for $450. Then I traded a good EJ25 short block to a dude that was building a dune buggy. In turn he gave me a complete/intact ECU main harness from an 01 forester with all brain boxes (ECU, cruise, ABS, etc). Then roughtly $300 for a clutch, fluids, shifter bushings, a new stake nut, washer, and gaskets (to fix the pop out issue).

TL/DR: find a parts car and harvest everything you can is my humble opinion.
 

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'00 2.5 rs sedan
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45 Posts
quick question...when installing the tranny into the block, how many of you closed up the gap between bellhousing and block using the mounting bolts? Ive read that some insert the shaft and wiggle the tranny until its flush with the block and ive read some close up the last 1/2" or so using the mounting bolts. We had to use bolts to get it the last little bit and I'm nervous I might have damaged the pilot bearing, but I really dont want to take the tranny back out.

EDIT: so I finished my swap today and everything works fine. there is a slight high pitched humming noise coming from under the car though that gets louder on acceleration. not sure if something is vibrating on the heatshield or not. I do have alot of the bushings upgraded to poly.

NOTES FOR THE SWAP:
1)wrx pedals do NOT fit in a 2.5 RS. it was easy to get the pedals in there and seated but when I lined up the mounting holes for the brake booster, the master cylinder studs that go through the firewall were no where close to lining up and when I'd stick those through the firewall the brake booster holes wouldnt line up. took a helleva lot of cutting and drilling to modify them to work on my 2000 RS. for an RS, get RS manual pedals.
2)my wiring job is only temperary because I will be doing a wrx motor swap soon so it is the minimum you need. all I did for the wiring is cut pin 11 & 12 (2 big white wires) off the brown harness plug going TO the tranny, and twisted them together. then I cut and twisted together the blue and black wires going to the white, 4 wire plug that goes to the auto shifter in the center console. thats it. boom. I did not hook up reverse lights or vss (speed). I have an old jdm sti 5spd that I swapped in and from what it looked like the VSS was not interchangable with my auto trannys vss...I could be wrong but it doesnt matter. I will have a whole manual harness anyway.
3)I didnt have to make a studd for the starter. I just bought an 02' wrx manual starter and it fit right in.
4)if you bleed the clutch line for hours and you still dont get any back pressure in the pedal...your slave is most likely bad. ask me how I know.
5)I highly suggest a tranny jack.
6)aslo when you push the clutch fork back to engage the throw out bearing to the pressure plate, there is SUPPOSE to be a snap to let you know it engaged. mine did not but it still engaged when I pushed on it. I was freaking out for a while thinking it wasnt engaging and I was going to have to removed the tranny but when I felt the clutch fork on my buddys wrx it felt the same so I left it and its fine. the clutch fork will feel really loose and sloppy which is what I believe that external spring is for.
 

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2000 RSTI
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10 Posts
Greetings everyone, I'm pretty new to this forum but have been active in the Suby life for around 12 years, mostly the GD chassis, but I finally joined the GC life last week with a 00 RS sedan auto. Long before purchase I have been doing TONS of reading regarding a 5 speed swap into the RS. I may be getting my hands on the drivetrain out of a friends 00 OBS. I'd have the car as a donor so I could pull just about anything I needed from it.

My question revolves around the electrical side of the swap between these cars. I haven't found any really data on if I can just pull the dash harness, Cruise controller, and ABS controller and retain the auto RS ECU or not. Can I use those OBS parts in the RS and just repin my auto RS ECU? Or should I try and find a 5 speed ECU? After the swap is complete I want everything to function properly.

If I have somehow completely missed a place discussing using 2 MY2000's for the swap please point me in the right direction.
 

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1996 Impreza lx 2dr
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66 Posts
Pull the wiring and ecu out of donor car. If brake lines under hood are different (no abs etc) swap that over too. I'm currently doing this project
 

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Cluster Specialist
1999 Impreza RS - WRB
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479 Posts
My question revolves around the electrical side of the swap between these cars. I haven't found any really data on if I can just pull the dash harness, Cruise controller, and ABS controller and retain the auto RS ECU or not. Can I use those OBS parts in the RS and just repin my auto RS ECU? Or should I try and find a 5 speed ECU? After the swap is complete I want everything to function properly.
Depending on how comfortable you are with wiring, the "easiest" way would be to pull the OBS parts and the wire harness and do a 1-for-1 install into the RS. This would lead to fewer gremlins in the end.
 

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187 Posts
Listen to Wannabe.

I have found all my gremlins, minus high rpm (up to 3k) in the cold mornings in neutral.

The car probably thinks it's still automatic, and tries to warm the car up thinking it has all that heavy transmission/torque converter weight.
 

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00 Impreza RS Sunburst Yellow
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4 Posts
2000RS Auto to 2002WRX Manual

Listen to Wannabe.

I have found all my gremlins, minus high rpm (up to 3k) in the cold mornings in neutral.

The car probably thinks it's still automatic, and tries to warm the car up thinking it has all that heavy transmission/torque converter weight.
Have you found a solution to the high rev?

Condition: Just completed mechanically a 2000 RS with 2002 WRX transmission and diff. went in easy.

Issue: High rev always! 2K at start up. after highway driving and warm, 3700 RPM!!!!! I just ordered a Manual ECU to hopefully lower the RPMs. Full disclosure, i have an EXEDY clutch kit that may be a light weight clutch. double bad for the Auto ECU i think.

Issue: wiring for Spedometer, Reverse and Neutral are all different. Any ideas about splicing in the harnesses? I have a complete 1998 JDM WRX harness & ECU and the rest of the 2002 WRX USDM harness and ECU. the reason i have not installed it is because i still have a 2.5RS block.

Any ideas or does anyone think i made the right move by just ordering the manual ECU?

Thanks!
 

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I'm looking to swap my automatic 07 impreza transmission to a 5spd manual. .. if i wanted to install a sti short block or wrx engine down the line, could i buy all m parts wrx (buy a wrx rear diff, driveshaft, tranny etc) and use my 2.5i stock ej25 engine in the meantime? Thanks
 

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96 Impreza LX
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54 Posts
Can you use an auto abs harness with a manual abs pump? Young gent got me a manual pump for $20 and looks like it bolts up and plugs into my 1996 Impreza harness. The Sti motor and wiring I have are sans abs, cruise and ac. But my Impreza has all those things and from what I can see they're all separate harnesses. Cruise I could care less about but ac and abs are an absolute must for me. Ac is a straight swap as the Sti wiring still has ac plugs. Abs seems to be the odd man out. Some info on this would be awesome.

Two questions for the peanut gallery here, what is the vacuum stuff that mounts to the forward side of the passenger strut tower? And what is the two hardlines that are mounted to same said shock tower? They look the same or similar on both cars. What are those?

Thx
 

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01 impreza rs 2.5 two door
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11 Posts
I did my manual swap this year and when smooth, got the reverse lights to work, as well as the car turning on without pressing the cluch, and since you have to disable the traction control unit you will have no abs and your speedo won't work , but I figure it out, it only takes two wires and you will have full speedometer form your cluster and from your data link, if anyone need help I can guide you with pics so you won't get stuck on the swap.. I did not post any pics here but I did on my Instagram at zroboost_gc8 thanks
 

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01 impreza rs 2.5 two door
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11 Posts
Hey man you don't have to cut anything n the harness, I just did mine 01 Impreza rs and runs normal, no limb mode revs just fine, speedo works reverse light,any ? Let me know
 

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2000 RS White
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2 Posts
XXzroBoostXX, are you using the automatic harness? I'm curious how you wired the ignition and neutral position switch.
 
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