BlueRidgeSE Posted January 7, 2006 Share Posted January 7, 2006 I've done a fair bit of reading and I know an early legacy turbo 3.9 LSD will fit into my 1987GL wagon d/r. I have easier access to a 3.9 LSD from a WRX. Does anyone know if this will fit or not, easy install ? Thanks:) Quote Link to comment Share on other sites More sharing options...
suberdave Posted January 7, 2006 Share Posted January 7, 2006 bolts right up but you will have to find the ever hard to find stub axels from a 1991 turbo legacy, i went to the dealer to find some, $225.00 ea and only one in the country. look for a set used. but will fit. Quote Link to comment Share on other sites More sharing options...
970subaru Posted January 7, 2006 Share Posted January 7, 2006 wait, the wrx is 3.9? Quote Link to comment Share on other sites More sharing options...
mudrat79 Posted January 7, 2006 Share Posted January 7, 2006 Also Are you talking front diff or rear diff..? Interesting...??? Quote Link to comment Share on other sites More sharing options...
BlueRidgeSE Posted January 7, 2006 Author Share Posted January 7, 2006 Sorry guys it's the rear LSD I am talking. I can get one from a local WRX swap shop. I know the guys and they said they have one that needs a reseal and it's out of an 02 WRX which I believe are 3.9 gearing. Finding Legacy turbo stub axles may not be too difficult where I am. It's about a 2 hour drive to get this WRX LSD so I don't want to get it unless it might work. I think they wanted $50 for it. Quote Link to comment Share on other sites More sharing options...
Do It Sidewayz Posted January 7, 2006 Share Posted January 7, 2006 Rick... WRX does not use a 3.9 ratio in the rear. it's actually a 3.54 i believe, WRX tranny is not 1:1 center diff ratio... The front diff is 3.9, but the rear is a 3.54 as the rear is slightly geared down i guess. you ever find those lugnuts btw? Quote Link to comment Share on other sites More sharing options...
ballitch Posted January 8, 2006 Share Posted January 8, 2006 the WRX center diff has a 1.1:1 ratio, thats why the rear diff is 3.545 and the front is 3.90. however, you should be able to put your ring and pinion on the WRX rear diff and it all should be fine, but dont hold me to that. even if its only fifty bucks down the drain, you didnt lose much. ~Josh~ Quote Link to comment Share on other sites More sharing options...
WJM Posted January 8, 2006 Share Posted January 8, 2006 the WRX center diff has a 1.1:1 ratio, thats why the rear diff is 3.545 and the front is 3.90. however, you should be able to put your ring and pinion on the WRX rear diff and it all should be fine, but dont hold me to that. even if its only fifty bucks down the drain, you didnt lose much. ~Josh~ Correct. WRX center diff is 1:1...but the output shaft GEARING is for some reason is 1.1:1...and rear diff is 3.545. The 'old school' 3.900 ring and pinion is the SAME as the 'new school' R&P sets...use it. It's been done more times that I have eat at Subway (WJM eats at subay 1~2 times a day, and has done so for the last 4+ years). Quote Link to comment Share on other sites More sharing options...
BlueRidgeSE Posted January 8, 2006 Author Share Posted January 8, 2006 Thanks for the help. I will buy the WRX diff. and swap the parts as outlined in the FAQ section. (Do it Sidewayz, still looking for pug alloy lugs for my 15's, and some 14inch steel pug wheels if I come across some, Peugot parts in Canada are very scarce) Quote Link to comment Share on other sites More sharing options...
suberdave Posted January 9, 2006 Share Posted January 9, 2006 just got a set of turbo legecy stub shafts. turns out the clutch stub is just smaller in diamater than the WRX. so i will have to find a new way to mate the WRX diff. Quote Link to comment Share on other sites More sharing options...
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