Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

rearr diff options cuz oftranny swap

  • Please log in to reply
3 replies to this topic

#1 eddygordouk


    USMB is life!

  • Members
  • 245 posts
  • Sacramento

Posted 07 November 2005 - 05:08 PM

ever since learning about the speedo sensor in the tranny and odb2 goin into limp mode without it ive been leanin towards tranny swap rather than adapter plate for rx with ej25 going in. i was wondering, what diff would i need? can i use any from an ej? or does it haave to be from a ej25 model car? i have found some wrx rear diffs which sound pretty slick to get, if there is any difference. also i have read tot believe that since i have an ea82t my rear axle splines will fit? or do i need new rear axles also? those are also for sale so im wooondering.

#2 Snowman


    Midnight Passenger

  • Members
  • 3,538 posts
  • Haines

Posted 07 November 2005 - 06:02 PM

As long as it's the same gear ratio, any subaru diff should work. I'm not positive about the newer ones matching up with your axles, but I know they will at least through the gen 1 legacy.

#3 eddygordouk


    USMB is life!

  • Members
  • 245 posts
  • Sacramento

Posted 07 November 2005 - 08:12 PM

so now a website has got me wondering, it seems to show that the auto diff ratio of a wrx is the same as a manual 2001 RS diff ratio. That beign are they then switchable? that would be nice since it would give me a slightly larger amount of places to look for diffs. just a thought. also would i have to shorten/lengthen my axels or anything after swap?

#4 ballitch


    Certified Subaru Nut

  • Members
  • 1,000 posts
  • Salem, OR

Posted 07 November 2005 - 08:28 PM

the wrx has a front diff of 3.9, a center diff of 1.1:1, and a rear diff of 3.545 or 3.454, not the one you want. and i was wrong everyone, my 1990 has a rear diff of 4.111, my bad. also, check out the archives for the axle/spline count thread it will help alot.


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users