subieman Posted October 30, 2005 Share Posted October 30, 2005 I know this has been done. Mudrat fitted a ea82 transmission behind a EJ motor in a forester. (Forester_Ranger's I think) I have a 90 Legacy that I want a ea tranny in. I need the adapter plate, that’s a given. But I have questions about the rear diff and driveline. How do I convert the rear diff to 3.9 gear ratio on the Legacy? Do I just need to swap out the ring? Or will a ea rear diff bolt up to the Legacy? Also, I know the transmissions are different lengths. Which drive line would I use? Do you have any input Forester_Ranger? Thanks, Quote Link to comment Share on other sites More sharing options...
NoahDL88 Posted October 30, 2005 Share Posted October 30, 2005 The rear diff should bolt right in, i'd just change the whole diff, although on the Legacy there is much more support for the diff than on the EA-82's You may have to make a custom drive line, and shorten or lengthen the section in front of the carrier bearing Quote Link to comment Share on other sites More sharing options...
Ratty2Austin Posted October 30, 2005 Share Posted October 30, 2005 the diff casing and the stubs are the same on 90-94 legacys, and the EA cars... so they are a direct bolt in.... I am wondering this on my impreza- the driveline and CVs... will an EA82 driveshaft bolt into my impreza? anyone with an EA82 want to measure the 3 points, and I can measure the points on my impreza so we can collaborate a data thread so we can figure this out? Quote Link to comment Share on other sites More sharing options...
subieman Posted October 30, 2005 Author Share Posted October 30, 2005 Oh yeah. I dunno about transmission mounts and how they will line up. Also we would have to use GL-10 turbo axels right? Are they long enough to use in a legacy? Quote Link to comment Share on other sites More sharing options...
Free Range Posted October 30, 2005 Share Posted October 30, 2005 They call these cars lego's for a reason... keep the EJ axles, only way it will and has worked w/o fabbong axles. note, the rear axles are side specific on early legacy, don't know about newer ones. Right is 5/16" shorter, messed this up last week on a rear lsd swap, made a nasty howl, but only above 70mph. don't know if the rear 3.90 ring gear will bolt up to the slip fit style rear diff of the new gen EJ's. Quote Link to comment Share on other sites More sharing options...
Snowman Posted October 30, 2005 Share Posted October 30, 2005 You'll have to use a tranny from a turbo model with 25 spline stubs so it will match up with the legacy axles. Use the EJ driveshaft...it will probably have to be shortened or lengthened a bit, but I've been told it's stronger than the EA shafts and less prone to joint failure. Also, the mounting for the carrier bearing is slightly different between the two cars...it will bolt up, but it's not perfect. Quote Link to comment Share on other sites More sharing options...
Caboobaroo Posted October 31, 2005 Share Posted October 31, 2005 You'll have to use a tranny from a turbo model with 25 spline stubs so it will match up with the legacy axles. You should be able to swap the DOJs from a non turbo EA axle to the EJ axle to get the no turbo d/r Quote Link to comment Share on other sites More sharing options...
MilesFox Posted October 31, 2005 Share Posted October 31, 2005 you can use the axles from a fwd ej18 impreza as the length is right and they have 23 splines for n/a ea82 trannies you can also swap on the doj cup from a turbo automatic ea82 axle onto the ej as its the same diameter of the 25 spline axles but its still 23 splines(turbo 3spds only) Quote Link to comment Share on other sites More sharing options...
88HatchMonster Posted October 31, 2005 Share Posted October 31, 2005 you can use the axles from a fwd ej18 impreza as the length is right and they have 23 splines for n/a ea82 trannies Interesting... I have a set of these axles sitting in a parts car right now, let me know if you think you could use them... Quote Link to comment Share on other sites More sharing options...
subieman Posted November 5, 2005 Author Share Posted November 5, 2005 Great info everyone. Only problem I see would be how the tranny mounts up. Guess I'll have to get my hands dirty this weekend and see how everything lines up! How much for the axles? Quote Link to comment Share on other sites More sharing options...
Snowman Posted November 5, 2005 Share Posted November 5, 2005 Great info everyone. Only problem I see would be how the tranny mounts up. Guess I'll have to get my hands dirty this weekend and see how everything lines up! How much for the axles? When I put the EJ tranny in my EA car, i had to weld the EJ tranny mounts to the EA crossmembers. I would imagine you'd have to do the same for this conversion, but you may be able to just drill some new mounting holes. Either way, be prepared for some fab work. Quote Link to comment Share on other sites More sharing options...
88HatchMonster Posted November 5, 2005 Share Posted November 5, 2005 Great info everyone. Only problem I see would be how the tranny mounts up. Guess I'll have to get my hands dirty this weekend and see how everything lines up! How much for the axles? $50 + shipping for the axles, but if you want to buy one of my adapter plates I'll throw in the axles for free. -Ryan My EJ adapter thread Quote Link to comment Share on other sites More sharing options...
subieman Posted November 6, 2005 Author Share Posted November 6, 2005 $50 + shipping for the axles, but if you want to buy one of my adapter plates I'll throw in the axles for free. -Ryan My EJ adapter thread Cool, I'll let you know Quote Link to comment Share on other sites More sharing options...
ballitch Posted November 6, 2005 Share Posted November 6, 2005 have you looked at the sticker on the back of your 90's rear diff. mine says 3.90, dont know about yours, mine is a manual. ~Josh~ Quote Link to comment Share on other sites More sharing options...
subieman Posted November 6, 2005 Author Share Posted November 6, 2005 have you looked at the sticker on the back of your 90's rear diff. mine says 3.90, dont know about yours, mine is a manual. ~Josh~ Yeah its a 4.11. Quote Link to comment Share on other sites More sharing options...
stumpy Posted November 8, 2005 Share Posted November 8, 2005 Do you have another set of those axles? I need a set as well as an adapter plate. Or if subieman does not purchase them I would be interested. Thankx, Stumpy $50 + shipping for the axles, but if you want to buy one of my adapter plates I'll throw in the axles for free. -Ryan My EJ adapter thread Quote Link to comment Share on other sites More sharing options...
subieman Posted November 8, 2005 Author Share Posted November 8, 2005 Do you have another set of those axles? I need a set as well as an adapter plate. Or if subieman does not purchase them I would be interested. Thankx, Stumpy Im still a few months out. If you need the axles now, they are all yours. Quote Link to comment Share on other sites More sharing options...
88HatchMonster Posted November 8, 2005 Share Posted November 8, 2005 Do you have another set of those axles? I need a set as well as an adapter plate. Or if subieman does not purchase them I would be interested. Thankx, Stumpy Just one set. Looks like they're yours if you want them. Same deal applies. PM me when you're ready to buy. Quote Link to comment Share on other sites More sharing options...
88HatchMonster Posted November 9, 2005 Share Posted November 9, 2005 Subieman, the axles are still up for grabs for whenever you get around to your conversion. Stumpy ended up not needed them. Quote Link to comment Share on other sites More sharing options...
subieman Posted November 9, 2005 Author Share Posted November 9, 2005 Subieman, the axles are still up for grabs for whenever you get around to your conversion. Stumpy ended up not needed them. Cool thanks. I'll let you know Quote Link to comment Share on other sites More sharing options...
Ratty2Austin Posted November 10, 2005 Share Posted November 10, 2005 mmmm... lots of good info here here is a question, for the rear driveshaft, on a impreza wagon- anybody measure the driveshaft on an EA82 vrs EJ18AWD? i would like to know what I should do about the driveshaft.. EA82 driveshaft bolt on to impreza? or....? I can measure mine (imp) if someone with an EA82 will take measurements of their driveshaft? (rear diff mount to bolts @ carrier bearing to tranny rear output... Quote Link to comment Share on other sites More sharing options...
Snowman Posted November 10, 2005 Share Posted November 10, 2005 mmmm... lots of good info here here is a question, for the rear driveshaft, on a impreza wagon- anybody measure the driveshaft on an EA82 vrs EJ18AWD? i would like to know what I should do about the driveshaft.. EA82 driveshaft bolt on to impreza? or....? I can measure mine (imp) if someone with an EA82 will take measurements of their driveshaft? (rear diff mount to bolts @ carrier bearing to tranny rear output... I've got a Legacy driveshaft in my EA82 right now. The carrier bearing bolted up with a little fanagling, and the front section had to be shortened an inch (in retrospect, probably about 7/8" would be better). I don't know how the Legacy compares to the Impreza, but I do know it's not a big deal to run the Legacy shaft on the EA82 and I'm assuming it would work the other way around. Something to consider: A guy that has forgotten more about Subarus than I will ever know told me that the EJ shaft is stronger, and since it uses a DOJ for the center joint instead of a U-joint, it is less problematic. Quote Link to comment Share on other sites More sharing options...
subieman Posted November 16, 2005 Author Share Posted November 16, 2005 One more question. What axles would I use for the rear? I'll have a ea82 rear diff mounted up and legacy hubs. Sound like a problem? Quote Link to comment Share on other sites More sharing options...
offroadsubaruguy Posted November 18, 2005 Share Posted November 18, 2005 you might be able to use the fronts from an ej18 in the rear???? as i would think that they are the same, not sure on that one though... Quote Link to comment Share on other sites More sharing options...
mcbrat Posted November 18, 2005 Share Posted November 18, 2005 One more question. What axles would I use for the rear? I'll have a ea82 rear diff mounted up and legacy hubs. Sound like a problem? I think you'll need to use Legacy Turbo rear axles. Quote Link to comment Share on other sites More sharing options...
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