Zefy Posted March 11, 2008 Share Posted March 11, 2008 i'm looking to get my legacy rear suspension to run with the 3.7 LSD diff from an 87 RX to work with the axles on the legacy... the legacy has innies for the stub axles while the RX has outies. what are my options here? my thoughts are: -swap the guts from the 3.7 to the legacy housing and maintain the innies but change the diff ratio and make it LSD -swap my outies for some innies on my RX diff??:-\ (on paper it sounds good) -swap the inner cups on the axles to use outies? i know of the LSD swap into matching diffs from old gen cars however i can't seem to find reference for newer diffs with the different stub designs. Quote Link to comment Share on other sites More sharing options...
Numbchux Posted March 11, 2008 Share Posted March 11, 2008 depending what year legacy (???), it probably has stub axles that remove from the DOJ cups much like the EA82 ones. once those are removed, the legacy DOJ cups will attach to the EA82 stubs just like stock. also, pretty slim chance (if any....) that your legacy uses a 3.7 axle ratio. if you're going to put an EA82 LSD into it, you're going to be doing some gear work Quote Link to comment Share on other sites More sharing options...
JWX Posted March 11, 2008 Share Posted March 11, 2008 depending what year legacy (???), it probably has stub axles that remove from the DOJ cups much like the EA82 ones. once those are removed, the legacy DOJ cups will attach to the EA82 stubs just like stock. also, pretty slim chance (if any....) that your legacy uses a 3.7 axle ratio. if you're going to put an EA82 LSD into it, you're going to be doing some gear work He should be able to just swap the LSD unit it self while using the Ring and Pinion from what ever diff he is swapping. Like the 3.9 LSD swap.... Quote Link to comment Share on other sites More sharing options...
Zefy Posted March 11, 2008 Author Share Posted March 11, 2008 ok let me clarify... 1990 legacy. the ratio is wrong for my car and it is LSDless. i pretty much just want to put the RX diff into the legacy. (don't worry about the ratios matching the trans. the trans is 3.7) so all i have to do is pop the axles out, remove the stubs from the axles, then pop the diff in and slide the legacy axles over the RX stubs? that sounds way to easy... Quote Link to comment Share on other sites More sharing options...
carfreak85 Posted March 11, 2008 Share Posted March 11, 2008 I think you can just put in the RX diff. I did the opposite on my T-wagon, legacy VLSD into EA81 body and didn't have to swap stubbies. I assume the reverse is also possible. Quote Link to comment Share on other sites More sharing options...
Numbchux Posted March 11, 2008 Share Posted March 11, 2008 ok let me clarify... 1990 legacy. the ratio is wrong for my car and it is LSDless. i pretty much just want to put the RX diff into the legacy. (don't worry about the ratios matching the trans. the trans is 3.7) so all i have to do is pop the axles out, remove the stubs from the axles, then pop the diff in and slide the legacy axles over the RX stubs? that sounds way to easy... your trans is a 3.7?! huh......alright. but yes, that pretty well covers it. it really is that easy. before you start, take a peek under the legacy and see if it's got the spring pins like the EA82 axles. if the pins are there, then it'll be easier. some cars (pretty sure that didn't start till after ~'95ish) don't have separable stubs, and won't have the springpins at all. Quote Link to comment Share on other sites More sharing options...
Caboobaroo Posted March 12, 2008 Share Posted March 12, 2008 IIRC Zefy is running a RX trans as well:-p Quote Link to comment Share on other sites More sharing options...
Zefy Posted March 12, 2008 Author Share Posted March 12, 2008 IIRC Zefy is running a RX trans as well:-p yup... RX trans is what i'm using... Quote Link to comment Share on other sites More sharing options...
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