fullerslgt Posted January 5, 2010 Share Posted January 5, 2010 so i am gonna swap out my oils in the transmission and the rear diff. what are the recommendations? synthetic, and what brand? thanks Link to comment Share on other sites More sharing options...
f1anatic Posted January 5, 2010 Share Posted January 5, 2010 search. Synthetic of course. Link to comment Share on other sites More sharing options...
fullerslgt Posted January 5, 2010 Author Share Posted January 5, 2010 search...so in that case. redline? oh and i have a 5eat. Link to comment Share on other sites More sharing options...
ehsnils Posted January 5, 2010 Share Posted January 5, 2010 Make sure that you select the right type of oil for the gearbox since if you select the wrong you may kill your seals. Double-check your manual for that. And for the differential - synthetic, and if you have limited slip differentials you should also verify that it works with that. Some oils contains additives that causes more slip in the LSD rendering them less effective. And other oils contains specific additives for LSD:s (which doesn't matter if you lack LSD) If you don't have a LSD it's not that sensitive, but check your manual anyway. Also check this thread: http://www.legacygt.com/forums/showthread.php?t=62614 75W90 seems to be the recommended viscosity. And a synthetic oil is more resilient to breakdown than a dino oil. See more at: http://en.wikipedia.org/wiki/Gear_oil And I think that I would go for Castrol. But check out this page too: http://www.redlineoil.com/Products.aspx?pcid=4 Link to comment Share on other sites More sharing options...
fullerslgt Posted January 5, 2010 Author Share Posted January 5, 2010 Cool thanks for the info. Link to comment Share on other sites More sharing options...
f1anatic Posted January 5, 2010 Share Posted January 5, 2010 Wow...you could have sent him here; which required no search anyways since it is in the Maintenance forums. http://www.legacygt.com/forums/showthread.php?t=94834 Link to comment Share on other sites More sharing options...
SonOfBadBoy Posted January 5, 2010 Share Posted January 5, 2010 search...so in that case. redline? oh and i have a 5eat. I was recommended by IPT to use AMSOIL, but could not get it--so then it was Mobil1 dif and ATF fluids--obviously all synth.... so make your choice... Link to comment Share on other sites More sharing options...
fishbone Posted January 5, 2010 Share Posted January 5, 2010 True, but you don't want to be mixing fluids. The only way to do a FULL replacement of the ATF is to do a flush. A drain will only replace about 4.5 to 5 quarts of the total 10 quarts in the system. fullerslgt: Stick with Subaru OEM ATF. You have no reason to switch. See my post for my experience http://www.legacygt.com/forums/showpost.php?p=2572048&postcount=164 Link to comment Share on other sites More sharing options...
ehsnils Posted January 5, 2010 Share Posted January 5, 2010 Another issue when it comes to transmission oil changes. The oil filter on the EAT4 - the version where the filter is on the gearbox. What number does that have? It does look like the engine oil filter, but that doesn't mean that it is identical. Link to comment Share on other sites More sharing options...
fishbone Posted January 5, 2010 Share Posted January 5, 2010 Did somebody claim it's just like a regular oil filter? Maybe in aspect, but certainly not functionality. Link to comment Share on other sites More sharing options...
ehsnils Posted January 5, 2010 Share Posted January 5, 2010 From the outside it just looks like it, and I understand that it should be different, but the issue is - do anybody know the order number? Link to comment Share on other sites More sharing options...
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