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Thread: 6 Speed Swap Master Thread

  1. #1
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    Default 6 Speed Swap Master Thread

    OVERVIEW:

    I'm writing this thread to make the process of looking for, purchasing and installing a 6MT in your car more simple

    There are threads on various forums about this.... but many are cluttered and difficult to read.

    We just want the facts right?

    PURCASING PARTS:

    ok.... so you have fiqured out how you want to do the swap, now you just need parts

    New or Used?

    Used:
    Obviously used will be significantly cheaper and not require a break in period (ok.. maybe the clutch will).

    Ask about Mileage! a 150k STi tranny may not be stronger than your 60k 5mt!

    Lower the mileage, the better!

    If you're considering used you have several options as to where you can purchase from.

    Ebay Vendor: you can always find what you need on ebay GENERALLY you get Transmission, drive shaft, axles, linkage, throw out bearing, shift fork, shifter assembly and USUALLY fly wheel and clutch plate.

    Ebay Member: could be any assortment of things from just the transmission to the whole shebang including DCCD. ASK THE SELLER FOR A COMPLETE LIST

    Forum Member: could be any assortment of things from just the transmission to the whole shebang including DCCD. ASK THE SELLER FOR A COMPLETE LIST

    Junk Yard: Make sure you let them know all of the parts you need BEFORE you order and they start pulling parts off. Ask for pictures!!!

    New:
    Obviously more expensive... but you know what you're getting

    What you WON'T get with a new tranny

    Clutch
    Linkage (any part)
    Reverse lockout cable/lever (all parts)
    shift boot
    Rubber housing
    Drive Shaft
    DCCD (all parts)
    6 Speed mount
    Fluids



    Contact anyone of our site vendors for details!


    Basic 6 speed info:

    JDM STi 2001-2006
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 1.061 / 0.842
    3.90 final drive (front and rear) or 4.44 Front and rear /has both male and female front axles (check production date, changes mid MY03). LSD Front diff(except STi Forrester, some EDM and V7 Wagon)/DCCD Center (MY01-MY04 is 36F/64R Bias Open/ MY05+ is 41F/59R Bias Open)
    Clutch = Pull


    USDM STi
    2004- Part# 32000AG880
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 final drive (front and rear)/has both male and female front axles (check production date, changes mid year). LSD Front diff/DCCD Center (36F/64R Bias Open)
    Clutch = Pull

    2005- Part# 32000AH150
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 final drive (front and rear)/ Male front axles. LSD Front diff/DCCD Center (36F/64R Bias Open)
    Clutch = Pull

    2006- Part# 32000AJ760
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    2007- Part #'s 32000AJ350 and 32000AJ100
    Ratios= 3.636/ 2.375/ 1.521/ 1.137/ 0.971/ 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    USDM Legacy Spec B

    2007- Part# 32000AJ390
    Ratios= 3.636 / 2.235 / 1.521 / 1.137 / 0.891 / 0.707
    3.90 front final drive-3.54 rear final drive/ Male front ales. Open front diff/ Viscous center diff
    Clutch = Pull

    Please note: I didn't list the 08' STi or Spec B because of the lack of the vehicle speed sensor on the front diff. The can work if you swap the bell housing from an older 6 speed but it is a lot of work.

    Axle/final drive specs for your USDM car:

    1993-2001 Impreza:5mt / 4eat
    Final drive: 3.90/4.11/4.44 Please look in your owners manual or consult a dealer to run your vin # and figure out which you have.
    Front Axles = Female
    Clutch = Push

    2002-early 2004 WRX 5mt/4eat
    Final drive: 5mt= 3.90 Front/3.54 Rear - 4eat 4.11 Front and rear
    Front Axles = Female
    Clutch = Pull

    Late 2004-2005 WRX 5mt/4eat
    Final Drive: 3.90 Front/3.54 Rear - 4eat 4.11 Front and rear
    Front Axles = Male
    Clutch = Pull

    2006-2007 WRX 5mt/4eat
    Final Drive: 3.70 Front and Rear - 4eat 4.11 Front and rear
    Front Axles = Male
    Clutch = Push


    DRIVE SHAFTS:
    1993-2001 Impreza: This generation 4eat shaft is the best choice as it has the correct center support bearing mount. If you have an R180 use this Subaru part# 38358AA000 (small bolt pattern) yoke to adapt the 4eat shaft.

    2002-2007 WRX 4eat: Will bolt directly in with a R160 rear diff, will not bolt to USDM R180 without Subaru part# 38358AA000 (small bolt pattern)

    2004-2007 STi: Will not bolt to a R160 unless you use flange Subaru part# 38358AA040 (large bolt pattern)

    Both of these yokes are interchangeable between R160 and R180 to suit the drive shaft you have available.

    REAR DIFFERENTIAL:


    R160- Depending on your choice of 6mt, you may need to change the ratio in your R160 to coordinate to the final drive of the 6mt. (please compare the front and rear final drive ratios of your stock car vs. the 6mt in the charts above)

    Subaru Part #'s

    Rear Diff

    38410AA080 - 2004 Rear Diff Unit
    38410AA080 - 2005 Rear Diff Unit
    38410AA120 - 2006 Rear Diff Unit
    38410AA140 - 2007 Rear Diff Unit


    Front Diff

    38410AA060 - 2004 Front Diff Unit
    38410AA100 - 2005, 2006, 2007 Front Diff Unit


    Center Diff (DCCD)
    38913AA160 - 2004, 2005 Center Diff Unit
    38913AA190 - 2006, 2006 Center Diff Unit

    R180- There are 3 Subaru ratios available (3.54/3.90/4.44). Choose the one that coordinates with the 6mt you have choosen.

    USDM 04'-05' STi = 3.90 (also all JDM STi's)
    USDM 06'-07' STi = 3.54
    USDM Spec B = 3.54
    JDM 01'-02' Gravel Spec STi = 4.44

    AXLES:
    Front Axle:

    Female Axles- Held in by a roll pin that has to be tapped out to slide axle off of transmission stub.

    Male Axles- Held in by retainer clip on the diff side of the axle. They have to be "popped" out of the front diff for removal.


    If you choose a male axle 6mt and you have a female front axle car you will need these:

    806730042 Oil Seal LH x1
    806730041 Oil Seal RH x1
    38415AA110 Axle Stub x2
    805329010 C-Clip x2

    If you have a Female 6mt and a male front axle car you will need the following:

    806735230 Oil Seal x1
    806735240 Oil Seal x1

    CLUTCHES:

    Pull Style- The release bearing is snapped into the pressure plate. It requires the release fork pivot rod to be removed to separate the transmission from the engine. The slave cylinder actuates forward (pointed away from the firewall).

    Push Style- The release bearing and fork stay with the transmission when separating it from the engine. The slave cylinder actuates rearward (pointed to the firewall).

    Flywheels:

    02'-05' WRX all use the same clutch and flywheel (except very early 02's). The 5mt clutch can be used with the 6mt but is a smaller diameter than the 6mt unit. The WRX slave cylinder can be reused on all 6mt's.

    06'-07' WRX will have to switch to either the 02'-05' WRX clutch or a 04'+ STi clutch and slave cylinder.


    Clutch fork shaft (long part the clutch fork pivots on) - 30532AA020
    Clutch fork shaft plug (threaded cap that holds the fork shaft in) - 30550AA000 (all pull style 5mt from 93'-05')
    Output Shaft Oil Seal (oil seal for the driveshaft interface) - 806735210
    Clutch fork spring (spring that connects clutch fork to bell housing) - 30546AA060
    All for the 2004-2007 6mt (may fit other models)
    Clutch fork shaft (long part the clutch fork pivots on) - 30532AA020 - ~ $30
    Clutch fork shaft plug (threaded cap that holds the fork shaft in) - 30550AA000 - ~$13
    Output Shaft Oil Seal (oil seal for the driveshaft interface) - 806735210 - $11.50
    Clutch fork spring (spring that connects clutch fork to bell housing) - 30546AA060 - $5.20


    DCCD

    May or may not be included in the package! ASK THE SELLER!!

    You need:
    Controller Module
    Wiring
    Controller
    Last edited by Bu11dogg2; 09-02-2011 at 03:15 PM. Reason: added dif part numbers

  2. #2
    Founding Father/SCS Original
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    Default

    1993-2001 RS



    Full Swap
    You will need: 04/05/06/07 USDM STi Transmission, mounts, drive shaft, R180, rear and front axles, rear and front hubs, struts/springs, clutch plate, flywheel, throw out bearing, shift fork, brakes, rotors (additional parts may be required such as exhaust that will clear the tranny, and other suspension and driveline tidbits DEPENDANT ON YOUR SET UP)


    You will need:

    1993-2001 Impreza: This generation 4eat shaft is the best choice as it has the correct center support bearing mount. If you have an R180 use this Subaru part# 38358AA000 (small bolt pattern) yoke to adapt the 4eat shaft.

    1993-2001 Impreza 5mt / 4eat
    Final drive: 3.90/4.11/4.44 Please look in your owners manual or consult a dealer to run your vin # and figure out which you have.
    Front Axles = Female
    Clutch = Push
    Last edited by Bu11dogg2; 09-02-2011 at 03:16 PM.

  3. #3
    Founding Father/SCS Original
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    Default

    2002-2003 RS

    Full Swap (Most expensive)
    You will need: 04/05/06/07 USDM Transmission, mounts, drive shaft, R180, rear and front axles, rear and front hubs, struts/springs (possibly custom top hats), clutch plate, flywheel, throw out bearing, shift fork, brakes, rotors.

    Keep your Hubs/Brakes Option 1 (Expensive)
    You will need: 06/07 USDM Transmission, mounts, STi drive shaft, R180, Custom Rear axles, axle stubs for front Front axles, 04 STI axles seals, circlips clutch plate, flywheel, throw out bearing, shift fork, Shift linkage, fluids, boot grease kit.

    Keep your Hubs/Brakes Option 2 (Cheapest)
    You will need: 06/07 USDM Transmission, mounts, 2002-2007 WRX AUTOMATIC drive shaft, R160, axle stubs, clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, 04 STI axles seals, circlips, fluids, boot grease kit.

    Part #'s for above items:
    Transmission: 2006- Part# 32000AJ760
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    Transmission: 2007- Part #'s 32000AJ350 and 32000AJ100
    Ratios= 3.636/ 2.375/ 1.521/ 1.137/ 0.971/ 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    2002-2007Auto WRX Drive Shaft: Subaru part# 38358AA000 (small bolt pattern)

    Tidbits
    806730042 Oil Seal LH x1
    806730041 Oil Seal RH x1
    38415AA110 Axle Stub x2
    805329010 C-Clip x2

    If you have a Female 6mt and a male front axle car you will need the following:

    806735230 Oil Seal x1
    806735240 Oil Seal x1
    Last edited by Bu11dogg2; 09-02-2011 at 03:16 PM.

  4. #4
    Founding Father/SCS Original
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    Default

    2002-2003 WRX
    2002-early 2003 WRX 5mt/4eat
    Final drive: 5mt= 3.90 Front/3.54 Rear - 4eat 4.11 Front and rear
    Front Axles = Female
    Clutch = Pull

    Full Swap (Most expensive)
    You will need: 04/05/06/07 USDM Transmission, mounts, drive shaft, R180, rear and front axles, rear and front hubs, struts/springs (possibly custom top hats), clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, brakes, rotors.

    Keep your Hubs/Brakes Option 1 (Expensive)
    You will need: 06/07 USDM Transmission, mounts, STi drive shaft, R180, Custom Rear axles, axle stubs for front Front axles, 04 STI axles seals, circlips clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, fluids, boot grease kit.

    Keep your Hubs/Brakes Option 2 (Cheapest)
    You will need: 06/07 USDM Transmission, mounts, 2002-2007 WRX AUTOMATIC drive shaft, R160, axle stubs, clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, 04 STI axles seals, circlips, fluids, boot grease kit.

    Part #'s for above items:
    Transmission: 2006- Part# 32000AJ760
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    Transmission: 2007- Part #'s 32000AJ350 and 32000AJ100
    Ratios= 3.636/ 2.375/ 1.521/ 1.137/ 0.971/ 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    02'-05' WRX all use the same clutch and flywheel (except very early 02's). The 5mt clutch can be used with the 6mt but is a smaller diameter than the 6mt unit. The WRX slave cylinder can be reused on all 6mt's.

    2002-2007Auto WRX Drive Shaft: Subaru part# 38358AA000 (small bolt pattern)

    Tidbits
    806730042 Oil Seal LH x1
    806730041 Oil Seal RH x1
    38415AA110 Axle Stub x2
    805329010 C-Clip x2

    If you have a Female 6mt and a male front axle car you will need the following:

    806735230 Oil Seal x1
    806735240 Oil Seal x1
    Last edited by Bu11dogg2; 09-02-2011 at 03:16 PM.

  5. #5
    Founding Father/SCS Original
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    Ver8 ej207 + 6 speed

    Default

    2004-2005 RS

    Full Swap
    You will need: 04/05/06/07 USDM Transmission, mounts, drive shaft, R180, rear and front axles, rear and front hubs, struts/springs (possibly custom top hats), clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, brakes, rotors.

    Keep your Hubs/Brakes Option 1 (Expensive)

    You will need: 06/07 USDM Transmission, mounts, STi drive shaft, R180, Custom Rear axles, axle stubs for front Front axles (early 2004 models), 04 STI axles seals, circlips clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, fluids, boot grease kit.

    Keep your Hubs/Brakes Option 2 (Cheapest)
    You will need: 06/07 USDM Transmission, mounts, 2002-2007 WRX AUTOMATIC drive shaft, R160, axle stubs, clutch plate, flywheel, throw out bearing, shift fork, Shift linkage,04 STI axles seals, circlips, fluids, boot grease kit.


    Part #'s for above items:
    Transmission: 2006- Part# 32000AJ760
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    Transmission: 2007- Part #'s 32000AJ350 and 32000AJ100
    Ratios= 3.636/ 2.375/ 1.521/ 1.137/ 0.971/ 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    2002-2007Auto WRX Drive Shaft: Subaru part# 38358AA000 (small bolt pattern)

    02'-05' WRX all use the same clutch and flywheel (except very early 02's). The 5mt clutch can be used with the 6mt but is a smaller diameter than the 6mt unit. The WRX slave cylinder can be reused on all 6mt's.

    Tidbits
    806730042 Oil Seal LH x1
    806730041 Oil Seal RH x1
    38415AA110 Axle Stub x2
    805329010 C-Clip x2

    If you have a Female 6mt and a male front axle car you will need the following:

    806735230 Oil Seal x1
    806735240 Oil Seal x1
    Last edited by Bu11dogg2; 09-02-2011 at 03:16 PM.

  6. #6
    Founding Father/SCS Original
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    Default

    2004-2005 WRX

    There are a few different ways you can do this in an 04/05 WRX

    Full Swap (Most expensive)

    You will need: 04/05/06/07 USDM Transmission, mounts, drive shaft, R180, rear and front axles, rear and front hubs, struts/springs, clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, brakes, rotors.

    Estimated cost without labor:

    Keep your Hubs/Brakes Option 1 (Expensive)

    You will need: 06/07 USDM Transmission, mounts, STi drive shaft, R180, Custom Rear axles, axle stubs for front Front axles (early 2004 models), 04 STI axles seals, circlips clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, fluids, boot grease kit.

    Keep your Hubs/Brakes Option 2 (Cheapest)
    You will need: 06/07 USDM Transmission, mounts, 2002-2007 WRX AUTOMATIC drive shaft, R160, axle stubs, clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, 04 STI axles seals, circlips, fluids, boot grease kit.


    Part #'s for above items:
    Transmission: 2006- Part# 32000AJ760
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    Transmission: 2007- Part #'s 32000AJ350 and 32000AJ100
    Ratios= 3.636/ 2.375/ 1.521/ 1.137/ 0.971/ 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    02'-05' WRX all use the same clutch and flywheel (except very early 02's). The 5mt clutch can be used with the 6mt but is a smaller diameter than the 6mt unit. The WRX slave cylinder can be reused on all 6mt's.

    2002-2007Auto WRX Drive Shaft: Subaru part# 38358AA000 (small bolt pattern)

    02'-05' WRX all use the same clutch and flywheel (except very early 02's). The 5mt clutch can be used with the 6mt but is a smaller diameter than the 6mt unit. The WRX slave cylinder can be reused on all 6mt's.

    Tidbits
    806730042 Oil Seal LH x1
    806730041 Oil Seal RH x1
    38415AA110 Axle Stub x2
    805329010 C-Clip x2

    If you have a Female 6mt and a male front axle car you will need the following:

    806735230 Oil Seal x1
    806735240 Oil Seal x1
    Last edited by Bu11dogg2; 09-02-2011 at 03:16 PM.

  7. #7
    Founding Father/SCS Original
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    Default

    2006-2007 2.5i
    Full Swap
    You will need: 04/05/06/07 USDM Transmission, mounts, drive shaft, R180, rear and front axles, rear and front hubs, struts/springs (possibly custom top hats), clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, brakes, rotors.

    Keep your Hubs/Brakes Option 1 (Expensive)

    You will need: 04/05/06/07 USDM STi Transmission, mounts, STi drive shaft, R180, Custom Rear axles, (early 2004 models), flywheel, throw out bearing, shift fork,Shift linkage, fluids, boot grease kit.




    Part #'s for above items:
    Transmission: 2006- Part# 32000AJ760
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    Transmission: 2007- Part #'s 32000AJ350 and 32000AJ100
    Ratios= 3.636/ 2.375/ 1.521/ 1.137/ 0.971/ 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    06'-07' WRX will have to switch to either the 02'-05' WRX clutch or a 04'+ STi clutch and slave cylinder.


    Clutch fork shaft (long part the clutch fork pivots on) - 30532AA020
    Clutch fork shaft plug (threaded cap that holds the fork shaft in) - 30550AA000 (all pull style 5mt from 93'-05')
    Output Shaft Oil Seal (oil seal for the driveshaft interface) - 806735210
    Clutch fork spring (spring that connects clutch fork to bell housing) - 30546AA060
    All for the 2004-2007 6mt (may fit other models)
    Clutch fork shaft (long part the clutch fork pivots on) - 30532AA020 - ~ $30
    Clutch fork shaft plug (threaded cap that holds the fork shaft in) - 30550AA000 - ~$13
    Output Shaft Oil Seal (oil seal for the driveshaft interface) - 806735210 - $11.50
    Clutch fork spring (spring that connects clutch fork to bell housing) - 30546AA060 - $5.20
    Last edited by Bu11dogg2; 09-02-2011 at 03:16 PM.

  8. #8
    Founding Father/SCS Original
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    Ver8 ej207 + 6 speed

    Default

    2006-2007 WRX

    Full Swap
    You will need: 04/05/06/07 USDM Transmission, mounts, drive shaft, R180, rear and front axles, rear and front hubs, struts/springs (possibly custom top hats), clutch plate, flywheel, throw out bearing, shift fork, brakes, rotors.

    Keep your Hubs/Brakes Option 1 (Expensive)

    You will need: 04/05/06/07 USDM STi Transmission, STi mounts, STi drive shaft, R180, Custom Rear axles,clutch plate, flywheel, throw out bearing, shift fork,Shift linkage, fluids, boot grease kit.

    Part #'s for above items:
    Transmission: 2006- Part# 32000AJ760
    Ratios= 3.636 / 2.375 / 1.761 / 1.346 / 0.971 / 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    Transmission: 2007- Part #'s 32000AJ350 and 32000AJ100
    Ratios= 3.636/ 2.375/ 1.521/ 1.137/ 0.971/ 0.756
    3.90 front final drive-3.54 rear final drive/ Male front axles. LSD Front diff/DCCD Center (41F/59R Bias Open)
    Clutch = Pull

    06'-07' WRX will have to switch to either the 02'-05' WRX clutch or a 04'+ STi clutch and slave cylinder.


    Clutch fork shaft (long part the clutch fork pivots on) - 30532AA020
    Clutch fork shaft plug (threaded cap that holds the fork shaft in) - 30550AA000 (all pull style 5mt from 93'-05')
    Output Shaft Oil Seal (oil seal for the driveshaft interface) - 806735210
    Clutch fork spring (spring that connects clutch fork to bell housing) - 30546AA060
    All for the 2004-2007 6mt (may fit other models)
    Clutch fork shaft (long part the clutch fork pivots on) - 30532AA020 - ~ $30
    Clutch fork shaft plug (threaded cap that holds the fork shaft in) - 30550AA000 - ~$13
    Output Shaft Oil Seal (oil seal for the driveshaft interface) - 806735210 - $11.50
    Clutch fork spring (spring that connects clutch fork to bell housing) - 30546AA060 - $5.20
    Last edited by Bu11dogg2; 09-02-2011 at 03:17 PM.

  9. #9
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    LEFT OVER PARTS?
    If you order a package deal from EBAY or from a member/vendor DEPENDING on your choice of swap you may have left over parts.

    Don't be afraid to order a package deal with extra parts as you can always resell them!

    You can also sell your stock transmission Especially if your swapping a turbo 5mt out! hold on to everything that comes off and post it up for sale!
    Last edited by Bu11dogg2; 06-30-2010 at 05:15 PM.

  10. #10
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    2008/09/10 WRX

    2008 STi 6 speed manual
    1st 3.636
    2nd 2.235
    3rd 1.521
    4th, 1.137
    5th 0.097
    6th 0.756
    Front final gear ratio: 3.9
    Rear final gear ratio: 3.545


    2009 STI 6 speed manual
    1st 3.636
    2nd 2.235
    3rd 1.521
    4th, 1.137
    5th 0.097
    6th 0.756
    Front final gear ratio: 3.9
    Rear final gear ratio: 3.545

    2010 STI 6 speed manual
    1st 3.636
    2nd 2.235
    3rd 1.521
    4th, 1.137
    5th 0.971
    6th 0.756
    Front final gear ratio: 3.9
    Rear final gear ratio: 3.545



    Swapping a 2008-10 6 Speed into your 08/09/10 WRX



    Option 1:

    1. 2008-2010 STi Transmission
    2. 2008-2010 STi Drive Shaft
    3. 2008-2010 STi Transmission mounts
    4. 2008-2010 STi linkage COMPLETE including reverse lockout
    5. 2008-2010 STi R180
    6. 2008-2010 STi Front/Rear Axles
    7. 2008-2010 STi Front/Rear Hubs
    8. 2008-2010 STi Clutch?????? (might be able to run stock?)
    9. DCCD Controller
    10. Sti brakes

    Option 2.

    1. 2008-2010 STi Transmission
    2. 2008-2010 STi Drive Shaft
    3. 2008-2010 STi Transmission mounts
    4. 2008-2010 STi linkage COMPLETE including reverse lockout
    5. 2008-2010 STi R180
    6. Custom Rear Axles
    7. DCCD Controller
    8. 2008-2010 STi Clutch?????? (might be able to run stock?)




    Option 3: (not 100% positive on this)(need to confirm if front axles will line up)

    1. 2006/07 sti tranny
    2. Auto wrx/93-2001 auto drive shaft (need to confirm fitment with R160)
    3. dccd controller
    4. 6 speed Trans mounts
    5. Complete linkage, frame work for the shift assembly, reverse lockout tidbits.
    6. Your stock or aftermarket clutch
    7. Something to make the speedo work? 08+ trans dont use a speed sensor
    8. Front axle circlips??? Need confirmation


    Option 4 (not 100% positive on this)
    1. 2004/05sti tranny
    2. 2004/05 sti drive shaft
    3. dccd controller
    4. 6 speed Trans mounts
    5. Complete linkage, frame work for the shift assembly, reverse lockout tidbits.
    6. STi clutch (complete)
    7. Something to make the speedo work? 08+ trans dont use a speed sensor
    8. Front axle circlips??? (Need confirmation)
    9. R180
    10. 04 wrx rear hubs (not sure if this work) or custom axles from driveshaftshop.com
    11. 04/05 sti rear axles (if swapping hubs)
    Last edited by Bu11dogg2; 10-14-2010 at 12:54 AM.

  11. #11
    Founding Father/SCS Original
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    Credit for write up given to groff from Legacygt.com


    2005-2009 Legacy GT (turbo model)

    Option #1:
    Transmission Choice: 2007+ LGT Spec B 6MT, 2004, 2005 STI 6MT
    Rear Differential Choice: 2007+ LGT Spec B R180, 2004+ STI R180, <2004 Legacy or you can use a regeared stock R160 as well with stock LGT rear axles
    Axles: Front - Stock LGT, Rear - 2007+ Spec B or custom Driveshaft Shop Axles

    Option #2:
    Transmission Choice: 2006/2007 STI 6MT
    Rear Differential Choice: Stock LGT R160
    Axles: Front - Stock LGT, Rear - Stock LGT

    Etc: DCCD Controller for STI 6MT, 2005+ 2.5i LGT Auto Driveshaft (for Sedan or Wagon based on what you have currently) or 2007+ Spec B Driveshaft, appropriate 6MT flywheel and clutch, 2005 STI front axle seals (recommended), 6MT shift linkage, 6MT shifter, 6MT shift knob (as a note, most donor sets more than likely won't have a knob as most have been robbed from the junkyards , 6MT slave cylinder, 6MT clutch fork

    Quick Pros and Cons to the different components:
    <2004 Legacy Differential is not going to be a viscous limited slip (CON)
    2007 Spec B 6MT does not contain a limited slip front differential (CON)
    2006+ STI 6MT has a 1:1 stepper center differential which allows you to use your Stock R160 on the 07+ cars, if you use an 04-05 STI trans.. the GT 5MT came in 2005-2006 4.11FD 2007-2009 5MT 3.90FD (PRO - Cheaper CON - weaker rear diff if using the R160)



    P/N's:
    Spec B Rear Axles - 28421AG03B
    R180 Rear Axle Seals – 806732200
    05 STi 6MT front half shaft seals:
    L/H 806735240
    R/H 806735230
    Tail Shaft Seal – 806735210
    Last edited by Bu11dogg2; 09-02-2011 at 03:17 PM.

  12. #12
    Gaddis, The Seraphinwolf's Avatar
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    Specifically Dylan @ DS1... He knows pretty much anything and everything about Subaru transmisions.
    -Gaddis, The Man Who Can't Make Up His Mind...
    "I am not such a fool as I look.", Plato to his desciples.
    "It's not that I'm so smart. It's that I stay with problems longer.", Albert Einstein.

  13. #13
    管理者 yaya's Avatar
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    I believe you can use an 02-07 WRX Auto driveshaft without the part you mentioned, by redrilling the companion flange.

  14. #14
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    Quote Originally Posted by yaya20 View Post
    I believe you can use an 02-07 WRX Auto driveshaft without the part you mentioned, by redrilling the companion flange.

    I've heard this too.....

  15. #15
    Gaddis, The Seraphinwolf's Avatar
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    Quote Originally Posted by Bu11dogg2 View Post
    any input from anyone?

    need help with what rear diff AND the gearing the 2002-03 2.5RS, the 2004-05 and 2006-07

    I believe it's the R160

    thanks!

    Yes R160, but not all R160 cases are the same. Part of why it's a pain sometime on the SVX to do a manual swap. :-/
    -Gaddis, The Man Who Can't Make Up His Mind...
    "I am not such a fool as I look.", Plato to his desciples.
    "It's not that I'm so smart. It's that I stay with problems longer.", Albert Einstein.

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