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Subaru Legacy/Outback Oil and Other Fluid Questions

41 messages,  Last post on Oct 28, 2009 at 3:10 PM

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What is this discussion about? Subaru Legacy, Subaru Outback, Fuel System, Oil, Fuel Efficiency (MPG), Sedan, Wagon

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#36 of 41 Re: Center Diff. Oil [ateixeira] by xwesx Oct 16, 2009 (10:50 am)
Replying to: ateixeira (Oct 16, 2009 10:10 am) That sounds about right. I know many late '90s and early '00s had issues with incompetent shops messing up the oil changes by draining differentials and overfilling engines. That may be the reason a Torx is used now. The engine oil pan's nut is 17mm.   I use the pump to fill my front/center differentials as well. I have a long-neck funnel, but it is tough to access that opening, especially on newer models. When I put the synthetic 75w-90 in my 2010 Forester a couple weeks ago, there is no way I could have accessed the port with a funnel. I had to pump a gallon of gear lube by hand. Well, i think it was something like 7.9 pints, so almost a gallon, but that is for a manual transmission, so I would think the differential only needs about half of that. I'm just being lazy and not using my own link to look up the info for the OP. Replies to this message: ateixeira (Oct 16, 2009 11:21 am) paisan (Oct 18, 2009 7:31 pm) ateixeira (Oct 19, 2009 8:35 am) nv1z (Oct 28, 2009 1:46 pm) and 1 more...
#37 of 41 Re: Center Diff. Oil [xwesx] by ateixeira Oct 16, 2009 (11:21 am)
Replying to: xwesx (Oct 16, 2009 10:50 am) LOL   I used a funnel with a long plastic tube. That tube ran down to the dip stick, which is also the fill hole for gear oil on the manual trans. Replies to this message: paisan (Oct 18, 2009 7:31 pm) ateixeira (Oct 19, 2009 8:35 am) nv1z (Oct 28, 2009 1:46 pm) xwesx (Oct 28, 2009 3:10 pm)
#38 of 41 Re: Center Diff. Oil [ateixeira] by paisan Oct 18, 2009 (7:31 pm)
Replying to: ateixeira (Oct 16, 2009 11:21 am) First of all there is NO fluid that is user serviceable on the CENTER DIFFY on a Subaru.   If this is an Automatic you have Front Diffy, Rear Diffy and the Automatic Trans Fluids.   If this is a MT, then you have Front Diffy combined with the Manual Trans Fluid and the Rear Diffy.   Front Diffy on an AT takes less than 1 Quart, Rear takes about 1 Quart. Front Diffy + Manual Trans on an MT takes 3 Quarts, Rear takes about 1 Quart.   Filling the Front Diffy on the AT is a Dipstick (the side will depend if it's a Turbo or a Non Turbo). Filling the Automatic Trans Fluid is a Dipstick (the side will depend if it's a Turbo or not) Rear Diffy on AT or MT is upper bolt on the casing itself.   -mike Subaru Guru and Track Instructor Replies to this message: ateixeira (Oct 19, 2009 8:35 am) nv1z (Oct 28, 2009 1:46 pm) xwesx (Oct 28, 2009 3:10 pm)
#39 of 41 Re: Center Diff. Oil [paisan] by ateixeira Oct 19, 2009 (8:35 am)
Replying to: paisan (Oct 18, 2009 7:31 pm) I worked on my front diff/manual trans.
#40 of 41 Re: Center Diff. Oil [paisan] by nv1z Oct 28, 2009 (1:46 pm)
Replying to: paisan (Oct 18, 2009 7:31 pm) Then what is one supposed to do if one has an issue where the suspected culprit is the center differential?   I have a 1990 Subaru Legacy that appears to have some center differential issues. It is an AWD model, but when both front wheels OR both rear wheels are on a low-traction surface, one of the wheels on that axle spins and torque is not shifted to the other axle. In other words, both axles get torque at different times, but no shifting of torque between axles happens when it is supposed to. Replies to this message: xwesx (Oct 28, 2009 3:10 pm)
#41 of 41 Re: Center Diff. Oil [nv1z] by xwesx Oct 28, 2009 (3:10 pm)
Replying to: nv1z (Oct 28, 2009 1:46 pm) If the center differential is the problem, a transaxle rebuild is on the horizon....

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