rear end deciphering. R160 or R180?

[AcostaMotoring]

Hey guys I got a dilemma. I recently pulled the rear end off of a 2005 subaru wrx impreza hoping it would be a great addition to my garage inventory. Downside to this is I'm not totally sure about what it is. I've done a little research online trying to figure out the specs of it but I can't really crack it. I was hoping you guys could help out. here are some pics.



any info would help thanks!

[AZ-ZBum]

Hey guys I got a dilemma. I recently pulled the rear end off of a 2005 subaru wrx impreza hoping it would be a great addition to my garage inventory. Downside to this is I'm not totally sure about what it is. I've done a little research online trying to figure out the specs of it but I can't really crack it. I was hoping you guys could help out. here are some pics.any info would help thanks!

The ratio is 3.9:1. 39 teeth on the ring gear, 10 on the pinion.

[evildky]

I'm guessing thats the R180, in which case, here si a guy using a subie R180 with modified subie cv's and modified datsun companion flangeshttp://forums.hybridz.org/show...+diffbeta motorsports is workign on a custom output chaft to allow you to use the datsun shafts

[hbpignosePA]

I'm guessing thats the R180, in which case, here si a guy using a subie R180 with modified subie cv's and modified datsun companion flangeshttp://forums.hybridz.org/show...+diffbeta motorsports is workign on a custom output chaft to allow you to use the datsun shafts

evildky you are the man thats flippin sweet!

[evildky]

for the record I believe the r160 has only 1 side bolt on each side and was available in older subies, I don't think they have used the 160 since the 80's but I could be wrong

[AcostaMotoring]

sweet info guys. You guys are helping so much. So this diff is in fact a r180 helical lsd?

[evildky]

I can't say that it's hellical without seeing the internals, you might be able to search the interweb to determine if the hellical was stock for the imprezza, remember the imprezza and the wrx are 2 different models here in the states

[NSR_s30]

Always good info Dave!

[AcostaMotoring]

I did some research but am not finding much about this particular diff. sites don't have detailed pictures of the casing and markings. One site claimed in text that the 05 subaru wrx impreza had a viscous rear diff. but no pictures were available for me to identify if it were mine or not. This is really tough guys. lol.

[evildky]

where sis you get the diff? earlier you said that you pulled it form an "imprezza wrx" which was it, was it an imprezza or a wrx?

[AcostaMotoring]

i couldn't identify the car by VIN's or anything since the front half was chopped. I can confidently say it was a wrx.

[evildky]

so you don't know the year or model the diff came from? look through the output shaft holes, does there appear to be a washer int he middle?

[AcostaMotoring]

not so much of a washer, from what I see I just see the snap ring for the axles. There looks to be a recessed area where a washer could go, but im not too sure. here some more pics.

[AcostaMotoring]

Im about 80% sure it was an 05 wrx.

[evildky]

thats an open diff

[NolimitZ32]

If it is anything other then an STI then it is a R160, stock WRX runs 3.90 final drive as was said before (however it runs 1.1:1 center and the rear is listed as 3.54 and not 3.90). Check out this post, scroll down a bit and it will tell you what you need to know http://forums.nasioc.com/forum...65334

FYI only STIs ran R180 every other 2.0 and 2.5 Subaru made from 2001-2008 ran a R160.

I just did a drivetrain swap on my WRX and did a lot of research on this. feel free to email me if you got any other questions man.
Modified by NolimitZ32 at 4:31 PM 11/3/2009

[AcostaMotoring]

Alrite guys, thanks for the info. I think Nolimit has ended this post. I'm glad to know what I finally have. Thanks again!

[evildky]

my bad, that is an R160 open, been years since I've used anything ther than the R200, guess I got the 2 backwards