dstargard Posted October 12, 2004 Share Posted October 12, 2004 Greetings, My '89 GL Touring Wagon has a 3.9 rear diff and I'd like to add a LSD. It sounds like the 3.7 is far more common, can I swap with the 3.7 or do I need to find a 3.9? Thanks... Link to comment Share on other sites More sharing options...
stngllhm Posted October 12, 2004 Share Posted October 12, 2004 hey i used to live near bend madress to be exact but back to topic if you where to put a 3.7 in you would have to change the tranny also. to get a 3.9 lsd i do believe you have to take the lsd out of a 3.7 and put it in a 3.9 case. Link to comment Share on other sites More sharing options...
Sweet82 Posted October 12, 2004 Share Posted October 12, 2004 Find a 3.7 LSD and put your existing 3.9 gears in the LSD and you'll have it. I think there are numerous write-ups on the how to details. Good luck Glenn 82 SubaruHummer---Welded diff 01 Forester---LSD Link to comment Share on other sites More sharing options...
stngllhm Posted October 12, 2004 Share Posted October 12, 2004 btw got a 3.7 lsd for sale Link to comment Share on other sites More sharing options...
dstargard Posted October 12, 2004 Author Share Posted October 12, 2004 Thanks for the info! Great group! Anyone have any links for write ups on how to do the swap? Link to comment Share on other sites More sharing options...
stngllhm Posted October 12, 2004 Share Posted October 12, 2004 Thanks for the info! Great group!Anyone have any links for write ups on how to do the swap? try a search Link to comment Share on other sites More sharing options...
mcbrat Posted October 12, 2004 Share Posted October 12, 2004 check out the links in the gray bar at the top of the page. Go to the USRM - Rapair and Mod section Link to comment Share on other sites More sharing options...
dstargard Posted October 12, 2004 Author Share Posted October 12, 2004 Thanks for the help getting around the site- Link to comment Share on other sites More sharing options...
Numbchux Posted October 12, 2004 Share Posted October 12, 2004 http://www.ultimatesubaru.org/forum/article.php?a=36 Link to comment Share on other sites More sharing options...
Dr. RX Posted October 12, 2004 Share Posted October 12, 2004 I'm going to be in Sisters around Christmas, I can show you how if you'd like. I can bring the special tool for removing the stub axles. If you have everything all ready, the whole process takes less then an hour. Link to comment Share on other sites More sharing options...
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