lvsarge Posted May 30, 2014 Share Posted May 30, 2014 Hi all. Question about gear oil. I'm going to be dropping my transmission on my 79 brat, which is a single range. What is the recommended gear oil for the transmission and rear dif? I put some 75/90 in the transmission to top it off after it had been leaking but I have not done a full drain/fill on it, and I suspect both the trans and rear differential could use it. However, I can't find any factory recommendations as to what specifically goes in each. Any help? Thanks in advance. Link to comment Share on other sites More sharing options...
Prwa101 Posted May 30, 2014 Share Posted May 30, 2014 Extra S. Its what comes in Subarus right outa the factory. on top of that its amazing to use. Subaru dealerships dont use it on vehicles they service because they have contracts with another company Valvoline or amz? cant remember. Link to comment Share on other sites More sharing options...
lvsarge Posted May 30, 2014 Author Share Posted May 30, 2014 Thanks for the response. So, http://www.amazon.com/Subaru-75W90-Extra-S-Transmission-Fluid/dp/B007L6Q1EK This one ^^^ ? For both Trans and rear dif, yes? And do you know the capacities, by chance? Link to comment Share on other sites More sharing options...
Prwa101 Posted May 30, 2014 Share Posted May 30, 2014 That's it! Not sure on the cap though. Rear will prolly be near 1 quart. And I know the eJ 5speeds hold just under a gallon. 3.7quarts if I remember correctly. But not sure about the brat stuff Link to comment Share on other sites More sharing options...
lvsarge Posted May 30, 2014 Author Share Posted May 30, 2014 So I wonder if this was indeed used/recommended by the Subaru factory in 1979? Link to comment Share on other sites More sharing options...
Prwa101 Posted May 30, 2014 Share Posted May 30, 2014 (edited) This is how we buy it at our shop. Comes right from Subaru in Japan, made by fuji heavy industries. I could almost guarantee that it did. Edited May 30, 2014 by Prwa101 1 Link to comment Share on other sites More sharing options...
Ibreakstuff Posted May 31, 2014 Share Posted May 31, 2014 (edited) Most stealerships do not use the good stuff with regular service, but most do have it in the shop if you request it. And some dealerships will even pump it out by the quart for you, I keep a small gas can for extra S only. If any transmission comes in making noises or hard to shift, you can bet that they will try a change with extra S before diagnosing anything. Edited May 31, 2014 by Ibreakstuff Link to comment Share on other sites More sharing options...
lvsarge Posted June 2, 2014 Author Share Posted June 2, 2014 Thanks for the input guys. Link to comment Share on other sites More sharing options...
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