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01 rsti silver
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Discussion Starter · #1 ·
I ended up picking up a gr transmission think I have almost everything but need a little help I have gd control arms up front and gc links in the rear they said the rears are going to be to narrow in the rear I believe and axels are going to be different what do I need to swap to that will work with the setup? Thank you and sorry if I'm bugging you all with these crazy questions just still learning swap lingo
 

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95L, 07 2.5i, R6
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If you are using a 5mt, you can use your axles and leave your control arms alone. The GR axles are all too long, including the center driveshaft. If you are doing a 6mt swap, there is a six speed swap thread on this site and on nasioc. I prefer the thread here. Anyone please chime in where I make mistakes, I always forget or confuse something. :/

5mt swap:

-keep your front and rear axles :)

-93-07 impreza or wrx 5mt driveshaft (corrected after Wannabe wrx's post)

-02-07 5mt shifter and linkage

6mt swap:

-keep your front axles (as long as the trans has the opposite end for your axles. For example, if your trans is female holes, your axle needs male stubs and vice versa)

-you can use the 04-07 sti driveshaft, the rear half has a section that will extend just a little to reach the r180 flange of the diff

-If you get a one piece driveshaft, it will need to be specifically for the 92-01 impreza with 6mt and r180 swap (I found out the pricey way)

-keep your rear axles and buy suberdave (a member on nasioc and has a website) inner race adapters + get inner cv cups from r180 axles (any subie) and install the races on your axles then into the r180 cups

-04-07 sti shifter and linkage

The starters for the 08+ on the 5mt and 6mt are different, so make sure to get the corresponding starter for the trans. The 6mt starters are still the same, so basically only the 08+ 5mt starter changes. I have an 11 5mt starter if anyone needs it. :)
 

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Cluster Specialist
1999 Impreza RS - WRB
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For a 5mt swap, you use either the 93-01 or the 02-07 manual driveshafts.

For the 6mt swap, you can use the 4eat (93-01 OR 02-07) driveshaft if you want to stay with the r160 rear diff. Otherwise, you use the 04-07 STi driveshaft for the r180.

Also, for 08 and later transmissions, you will need to buy a speed sensor adapter. Because the 08+ cars read speed and mileage from the ABS tone ring, those transmissions do not have the hole for the VSS in the bellhousing. Or, use the bellhousing from an 07 or earlier transmission and add the speedometer gear to the transmission itself.
 

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01 rsti silver
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Discussion Starter · #4 ·
Ok so this is what I have coming today '12 sti trans , 05 wrx rear diff with 3.54 sti diff flange 06 shift linkage and drive shaft. Also opted for the dccd pro do I didn't go with the speed gear and still need to get a starter
 

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Hi people

Im trying this swap, but the axels of gc are female in the transmission side while the axels of the gr are male.

I could not figure out what to do, can someone please help me?

Thank you

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2000 RSTi
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Hi people

Im trying this swap, but the axels of gc are female in the transmission side while the axels of the gr are male.

I could not figure out what to do, can someone please help me?
You can use GD/GG axles, they came both with male inner and female inner. The ones from a wagon are the correct length. You might be able to force sedan ones to fit, but they may not last as long since they will always be compressed.

The GR transmission do not have a speed sensor, do you have a plan to solve that issue too?
 

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Thank you for your answer!!

We don't have many gd/gg here, do you know if something from forester would work?

In fact, the gr axel matched with the gc knuckles but the screw is too short. So iam thinking if it's possível to change the knuckle point of gr by the gc knuckle point.

For the speed sensor:


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2000 RSTi
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Yes, there are probably are certain years of forester that have the correct style axles.

Subaru changed the axle styles in the early 2000s, and in your country it may be a different year than in the states. Unfortunately the newer axles sometimes have an ABS ring on it, which you may or may not be able to remove. If they are permanently attached, you would have to run the newer (Forester/GG/GD) front hub, so this might not be the best idea.

I remembered something that is even easier and cheaper:

You can pull the axle stubs out of a 4-speed subaru automatic transmission. (1990-2004 approximately) Just stick a screwdriver through the hole in the stub, and pull hard! You will need to use the axle seals for that style transmission, as the ones in your GR will leak.
 
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Can you explain a little bit more?

I find a 94 automatic legacy, and it should have male point that I can take out removing the pin?

Is that right?



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2000 RSTi
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You said It correct. You will have to pull hard since they have been installed for 26+ years now.
 

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Do you have a picture of this part?

As I said before, I would try to substitute the side that goes to the knuckle in the GR axle by the GC part...would it work or be the same as you said?

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I have no idea about GR axles or hubs into a GC, sorry.

Here is the stub that comes out of the 4eat auto transmission:

85813


I'm currently using these in 2 cars, my 2003 Baja and 1992 Legacy SS. Both have newer transmissions. With the correct (male to male) style axle seals, they won't leak gear oil.
 

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Do you have to disassemble the transmission to take it off? And do the same to put it in the GR transmission?

Or it comes out pushing?

Thank you very much my friend

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Put screwdriver in hole. Pull hard. There's nothing else to it.

The subaru manual transmissions that have factory stubs do need do be disassembled to remove. The automatic transmission stubs come out with no disassembly.
 

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Hi, how are you?

I would like to thank you, I will probably get my project done because of you.

I found the stubs, in the rear I will maintain the gc diff which is 3.9 like the new trans. The new rear diff does not match to the rear gc axles as well.

For the front, which seals do I need in the the trans? Can I leave the stock ones and just use the stubs or I need to change the seals gasket as well?

Thank you again
 

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I'm glad you are making progress on this. You need to change the seals or it will leak.

You will need to use seals for an older subaru 5mt that used stubs from the factory. Like any 1990s legacy or Impreza.
 

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I'm glad you are making progress on this. You need to change the seals or it will leak.

You will need to use seals for an older subaru 5mt that used stubs from the factory. Like any 1990s legacy or Impreza.
Hello! So...the final gear ratio are not the same and I cant use the rear gc diff and axles... How did you overcome this?

Thanks you Very much!
 

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So you have the new correct rear diff but it takes different axles?

Would you mind specifying what exactly the new diff is from? And what the rear axles are from is different?
 

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So you have the new correct rear diff but it takes different axles?

Would you mind specifying what exactly the new diff is from? And what the rear axles are from is different?
The New diff is the wrx GR diff, which is 3.7 final ratio, with the axles, but those dont fit on the GC hub.

The original rear diff of the GC body is 3.9 final ratio, but the axles dont fit on the GR rear Diff...

I was thinking if It is possible to open both diffs, change the gears between than and use the GC axles with de 3.7 final ratio to match the transmission
 

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What is the spec of your car originally? EJ18, ej20g WRX, ej207, ?

There will be compatible axles from either a particular model of GC8, or GD Impreza.
 
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