USDM STI prop shaft DOES NOT fit JDM r180
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This is a discussion on USDM STI prop shaft DOES NOT fit JDM r180 within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; Well, make this sticky because it will save many people the 0 plus 2 hours of labor to attempt the ...

  1. #1
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    USDM STI prop shaft DOES NOT fit JDM r180

    Well, make this sticky because it will save many people the $450 plus 2 hours of labor to attempt the install.

    What I have on my wrx is:

    JDM 6spd
    JDM r180 rear diff

    What I was using for a propeller shaft:
    1995 Automatic Impreza shaft

    What I tried to fit:
    USDM Sti 2004 propeller shaft

    The end result:
    It is 1:30 am and I am furious The diff hub holes do not line up with the USDM end hub/flange. I've taken a few pictures to show the difference from the auto shaft holes to the USDM Sti one. The auto shaft did fit, I just wanted something beefier.

    Close to lining up


    Opps, not really



    Argggg


    I recall a few people stating it would fit, I guess until you personally try do not rely on 2nd hand info I'm just pissed from spending 2 hours on my back for nothing.
    03 grocery get'n wagon

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    Registered User Retro's Avatar
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    Thats a lot of gap there. too bad man, sux.
    clutch, shift, gas, clutch, shift, gas, shift, clutch, gas, clutch gas, shift... oops!

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    Sticky made, and thanks for the info.

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    Registered User BoostedBoxer's Avatar
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    does someone know what fits?
    My Car is 100% STOCK!
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    Originally posted by platano
    At 14???
    shoot , I'd hit it at current age, on roof of the car, with cousin driving , neighbor and town priest in the back seat, and that kid from "N.Korea" riding shotgun.

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    Registered User AjIsDope's Avatar
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    Originally posted by BoostedBoxer
    does someone know what fits?
    03 Cobra
    566whp/515wtq

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  7. #6
    Registered User platano's Avatar
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    Won't the JDM propeller shaft fit??
    Quote Originally Posted by zoophagy
    Happy Birthday. May all your birthday dreams come true except for the one were I come over to your house, and you timidly ask me if I have ever kissed another guy before, and it ends up some weird poo porn movie.

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    Registered User DEADPOOL's Avatar
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    I ran into this problem also, we made new holes in the flange and now it works fine.
    "Celebrate we will, for life is short but sweet for certain"-DMB

    Liquid - "yes sticky! hes a god now!"

    02 WRX now JDM V8 STI (too many mods for my own good)

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    The flange for the R-160 and R180 can be swapped, easy! Just go to junk yard and get the right flange and pull off the old, put on the right size. The input shaft and splines are the same in both diffs. No need to get a different driveshaft!

    You can get the flange off of any Japanese car with a R180, it is a Nissan diff.

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    I have a US R180 on my WRX, it has the larger flange, I can use my stock driveshaft with my flange from my old R160, or I can put on the larger flange and use my one piece aluminum shaft from the driveshaft shop. Sorry you guys had to spend $$, and drill holes. That is not the right way! Now the output shafts going to axels are different, so you will need the US,STi axels, hubs, bearings, and carrier (upright) (spindle). Bottom line, yes, any driveshaft will work with both diffs.

    Scott

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    I use a five speed dogbox, so the length of shaft is the same, if anyone is wondering, the R180 and the R160 have the flange in the same spot. To take off the diff input flange, just take off the nut, and pull it off! The stock WRX driveshaft has lasted me a long time, but I did have a problem on the tranny side. The splined end twisted on the output shaft of tranny, so I got some spicer U-joints and better metal on the splines of shaft with my one piece aluminum one. I have never been to a dyno, but have been in the 10s @130mph. So I guess that may be the limit of the stocker. The STi seems to have the same shaft (except for legnth), and for the flange going to rear diff is bigger. The stock WRX shaft can be cut, and a better U-joint welded on, along with better material for splined area. This is an option, or just order an STI driveshaft, but it is not much different, just shorter.

    Scott

    this should be un-stuck. there is no real problem. All diffs can work with all shafts!
    Last edited by turbo2nr; 11-16-2004 at 05:47 PM.

  12. #11
    Registered User SpoolinSuby's Avatar
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    Ok so, the WRX R160 and JDM R180 are the same flange, and USDM R180 has the bigger flange, right? I just wanna make sure I am understanding this right.
    My Mods

    Quote Originally Posted by chrisj From NASIOC
    I just want a drivetrain that wont grenade itself when I dump 400whp to it in an attempt to melt my Proxes and hide my car in a cloud of smoke....

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    The flange can be taken off any subaru rear diff, and be used on any other rear diff. There are hundreds of flanges in the juck yard. Yes the USDM flange for the Sti (R180) has a larger bolt pattern, but a WRX flange will fit fine. I have no clue what a JDM Sti has.

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    Quote Originally Posted by turbo2nr View Post
    The flange can be taken off any subaru rear diff, and be used on any other rear diff. There are hundreds of flanges in the juck yard. Yes the USDM flange for the Sti (R180) has a larger bolt pattern, but a WRX flange will fit fine. I have no clue what a JDM Sti has.
    Can you diagram this compatibility in some kind of chart?

    I have an 06 WRX and I'm going to be swapping in an 06 STi tranny with R180 and the STi driveshaft. I know that is straight forward but are you saying I can use the factory 06 WRX driveshaft and just swap the flanges on the R180 and R160?

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    Quote Originally Posted by ev8siv3 View Post
    Can you diagram this compatibility in some kind of chart?

    I have an 06 WRX and I'm going to be swapping in an 06 STi tranny with R180 and the STi driveshaft. I know that is straight forward but are you saying I can use the factory 06 WRX driveshaft and just swap the flanges on the R180 and R160?

    No the two trannys are different legnths and you will be needing the shorter DS from the STi. You could just keep your R160 and get a flange from an R180 diff.

    Another example is I have a short, five speed Dogbox(again, six-speed is longer) with an R180 rear. I can't use an STi DS...it's too short! I had to use a regular WRX DS and swapped my flange on the STi diff to mate with a regular (smaller) flange from the wrx. But Now I have a custom one piece DS with the larger flange....so I put back on the Larger flange on my R180..

    Wanna buy an MRT Dogbox?? $4000 and it's yours. I have three different 4th gear ratios. It's a straight cut screamer. Cost me around $10,000 and will handle more HP than a STi tranny. Chit, but my whole car and toys! Hydra ECU, a few engines, spares, New (never started!)EJ22 with Crower pro-rods, titanium retainers and upgraded springs for BIG BOOST. AVO 500 turbo, etc....
    Last edited by turbo2nr; 12-12-2007 at 05:44 PM.

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    Quote Originally Posted by turbo2nr View Post
    No the two trannys are different legnths and you will be needing the shorter DS from the STi. You could just keep your R160 and get a flange from an R180 diff.
    Ok so you're saying I can use the STi Trans and STi Driveshaft with my R160 rear diff as long as I pull the flange off of my R160 and pull the flange off the R180 that I received and install the R180 flange onto the R160?

    Do you have a picture of the process or of the two flanges? This makes things sound a WHOLE lot easier!

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