markc0220k Posted January 31, 2020 Share Posted January 31, 2020 (edited) had read many posts and watched many youtube before shopping all tools (T70 socket and so on) and this morning i finally squeezed myself underneath the car . but then i looked and .. the pic was totally diff from i've seen here and youtube.. so which (red? blue?) arrow is the transmission drain plug? i searched and found some said 6MT shares oil with the front differential. but there is two plugs.. thanks ps: by the way, i'm planning to change all diff fluid as well. ppl said trans, front/rear diff use exact same fluid (i bought 6L of motul 300), true? Edited February 1, 2020 by markc0220k Link to comment Share on other sites More sharing options...
markc0220k Posted January 31, 2020 Author Share Posted January 31, 2020 (edited) btw.. HERE is one of the posts i've read. i did search on youtube "2009 subaru legacy gt spec b transmission fluid change" .. but all videos were not whats in front of me! Edited January 31, 2020 by markc0220k Link to comment Share on other sites More sharing options...
bemani Posted January 31, 2020 Share Posted January 31, 2020 Wouldn't the drain plug be the lower one? Otherwise it wouldn't drain. Link to comment Share on other sites More sharing options...
markc0220k Posted January 31, 2020 Author Share Posted January 31, 2020 Wouldn't the drain plug be the lower one? Otherwise it wouldn't drain. i thought so too Link to comment Share on other sites More sharing options...
markc0220k Posted January 31, 2020 Author Share Posted January 31, 2020 ok, i found this, looked much closer but just not sure if it's the same as my car, anyone please? Link to comment Share on other sites More sharing options...
Tehnation Posted February 1, 2020 Share Posted February 1, 2020 make sure you are watching videos with the 6mt and not the 5mt! you probably saw or read something about the 5mt. Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 (edited) make sure you are watching videos with the 6mt and not the 5mt! you probably saw or read something about the 5mt. ok, now i have another problem... does anyone know what size this plug is?? it is exactly looked like the plug with blue arrow Edited February 1, 2020 by markc0220k Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 i also found this but it just didn't show any about the size of hex key Link to comment Share on other sites More sharing options...
08SpecB_DE Posted February 1, 2020 Share Posted February 1, 2020 Looks like a 10mm. Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 Looks like a 10mm. yes, just picked up from autozone.. now i need to figure out where to fill the diff fluid.. Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 ok, i found refill the front diff at the same tube(?) where to fill the transmission fluid ... seriously?? Link to comment Share on other sites More sharing options...
apexi Posted February 1, 2020 Share Posted February 1, 2020 (edited) Yeah it's actually not bad, that's what the FSM says to do too. I usually stick a piece of clear tubing on the end of a normal funnel, but a long skinny funnel might work too. Edit: I forgot that I'm saying "it's not bad" as a non-turbo owner, it's pretty easy to get to the dipstick/fill hole on my car. On the turbos, it may be more obnoxious, there may be turbo goodies in the way.. Edited February 1, 2020 by apexi Link to comment Share on other sites More sharing options...
Andy_Mac Posted February 1, 2020 Share Posted February 1, 2020 The front diff shares the same fluid as the trans, don't try putting specialty diff fluid like you have for the rear diff in there. Chances are someone just rounded the old plug and installed a new one. It's worth removing both and checking if they are magnetized ones and if so removing all accumulated material. 2000 Legacy B4 RSK - SOLD 2006 Legacy BP5 GT Spec B wagon - Garage Thread 2011 VW T5 van 2.0L of turbo diesel awesomeness Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 Yeah it's actually not bad, that's what the FSM says to do too. I usually stick a piece of clear tubing on the end of a normal funnel, but a long skinny funnel might work too. thanks apexi, stupid me, your post just reminded me that i also have the vacation pic!! Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 (edited) The front diff shares the same fluid as the trans, don't try putting specialty diff fluid like you have for the rear diff in there. really? i thought all trans/front and rear diff are all motul gear300 75w90 Chances are someone just rounded the old plug and installed a new one. It's worth removing both and checking if they are magnetized ones and if so removing all accumulated material. i finally removed both, the nut (clutch housing side) is 70Nm on the menu? i don't think so, i did soaked it with penetrating oil for a whole afternoon (8hrs?), then once more before. i ended up open it with a 3+fts breakerbar plus ton of fears!! Edited February 1, 2020 by markc0220k Link to comment Share on other sites More sharing options...
Nonamedude Posted February 1, 2020 Share Posted February 1, 2020 This has been fun to follow. Couldn't help on the plugs though. The front diff is actually located inside the manual transmission so they all use 75w-90 gear oil including the rear. No worries there, there just isn't a separate fill for the front diff. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 (edited) The front diff is actually located inside the manual transmission so they all use 75w-90 gear oil including the rear. No worries there, there just isn't a separate fill for the front diff. Sent from my iPhone using Tapatalk ok, so what does he mean here " don't try putting specialty diff fluid like you have for the rear diff in there ... " ? Edited February 1, 2020 by markc0220k Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 (edited) just want to confirm before i drain the rear diff today, then refill all trans, front and rear diff with these gear 300, thanks Edited February 1, 2020 by markc0220k Link to comment Share on other sites More sharing options...
Tehnation Posted February 1, 2020 Share Posted February 1, 2020 basically you replace the front diff and tranny oil at the same time, which means they use the same oil, the front dif and tranny are all part of the same oiling system. Changing the tranny oil = changing the front dif and tranny oil. rear diff may or may not use different gear oil, i'm not sure, but its a seperate system. Link to comment Share on other sites More sharing options...
Tehnation Posted February 1, 2020 Share Posted February 1, 2020 but I was under the impression that the rear diff used the same oil.... that is for my 5mt with my whatever rear diff. You may not have the same rear differential with the 6mt. Link to comment Share on other sites More sharing options...
Nonamedude Posted February 1, 2020 Share Posted February 1, 2020 So they use 75w-90. Both of them. The comment has to do with slip modifiers. You'll be fine with what you have. I used redline 75w-90ns for the transmission and redline 75w-90 for the rear diff. The redline ns does not contain friction modifiers which is good for the synchros in the transmission where you want those in your lsd. HOWEVER we are really splitting hairs. You could use cheap wally world stop tech (which apparently is surprisingly good) and be fine. For 99% of people anything will be fine. I mainly went with redline for reported superior performance in sub freezing cold starts as I was noticing some hang ups there. Also I believe the front diff on the auto is separate from the trans and in that case you'd use the same gear oil for both diffs and atf for the trans. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Nonamedude Posted February 1, 2020 Share Posted February 1, 2020 Welcome to the world of splitting hairs over oil. You have motul, they make better than average stuff. Put it in. Change it in 2-3 years. Go have fun driving your car. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Tehnation Posted February 1, 2020 Share Posted February 1, 2020 spec b 6mt may have a different rear differential, i'm not sure. I would double check, it probably uses the same, but you never know. Link to comment Share on other sites More sharing options...
markc0220k Posted February 1, 2020 Author Share Posted February 1, 2020 spec b 6mt may have a different rear differential, i'm not sure. I would double check, it probably uses the same, but you never know. thanks Tehnation, here is what i found... Link to comment Share on other sites More sharing options...
Nonamedude Posted February 1, 2020 Share Posted February 1, 2020 Yea you'll see volume is different but it's all just any gl-5 spec oil. There's another page somewhere in the fsm the specifies the weight. Towards the beginning I think. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
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