('09-'13) Tranny oil + Differential oil+ plugs + Transfer case oil change? - Subaru Forester Owners Forum
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post #1 of 13 (permalink) Old 04-02-2012, 05:23 AM Thread Starter
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Talking Tranny oil + Differential oil+ plugs + Transfer case oil change?

Hi guys,

I've juste changed the air filter on my 09 ster with 45000Miles on it.

I took a look around and couldn't find the answer...

Tranny oil, what kind(that I found the answer but just wanna confirm) how many and how to flush and fill up?

Transfer case? Is there any in a forester??

Differential oil, front and rear? What kind, how many and how to flush and refill.

What kind of plugs do you guys recommend, iridum?
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post #2 of 13 (permalink) Old 04-02-2012, 05:59 AM
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Originally Posted by Joevirus563 View Post
Hi guys,

I've juste changed the air filter on my 09 ster with 45000Miles on it.

I took a look around and couldn't find the answer...

Tranny oil, what kind(that I found the answer but just wanna confirm) how many and how to flush and fill up?

Transfer case? Is there any in a forester??

Differential oil, front and rear? What kind, how many and how to flush and refill.

What kind of plugs do you guys recommend, iridum?
Tranny oil Subaru stuff or equivalent, I use the amsoil ATF. Subaru doesn't recommend a full flush, just drain and refill. You'll be draining about half the oil (~4.5 quarts). You can flush using ATF line at the radiator and running the car while refilling at the same pace, etc., but that's a pia and risky.

Differentials take 75w90 gear oil. Just drain and refill. Front has a drain plug below and fill through dipstick, be sure not to over fill. Rear is two plugs, one drain, one fill. Remove the fill one first. Then drain, replace the drain plug and fill. A fluid pump is helpful, but gear oil comes in those squeeze bottles so it's not hard to do without.

Engine nice and warm, for best results, and use caution.

I don't have anything to say about the plugs other than whatever floats your boat. Just make sure they are the right temp and gap.
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post #3 of 13 (permalink) Old 04-09-2012, 11:36 AM Thread Starter
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Ok what about the rear diff? How to check and fill?



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post #4 of 13 (permalink) Old 04-09-2012, 12:22 PM
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Ok what about the rear diff? How to check and fill?



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Can't check except by removing top plug. Just change it. Instructions in last post...I said warm engine, but really it's warm differentials. Take the car for a drive first.

Sorry, fill plug is the top plug. Make sure you remove that one first.
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post #5 of 13 (permalink) Old 04-09-2012, 12:56 PM
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What kind of plugs do you guys recommend, iridum?
+1 to what Guerilla has already said.

As far as your spark plugs go, use the OEM plug that Subaru recomends for your 2011 Forester. I tried to get away with some cheaper plugs, and I ended up getting the NGKs that I should have gotten in the first place.

If you want to make checking your Front Diff Fluid easier, do this Mod:

Front Diff DipStick Extension (my new favorite mod)

99 Foz S
06 Foz LL Bn
98 Foz L - Project Foz
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post #6 of 13 (permalink) Old 04-09-2012, 08:12 PM Thread Starter
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Ok and where is it the dip stick located for the rear diff?

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post #7 of 13 (permalink) Old 04-09-2012, 08:36 PM
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Ok and where is it the dip stick located for the rear diff?

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Pas de jauge, ouvrir le bouchon d'accès.
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post #8 of 13 (permalink) Old 04-09-2012, 08:36 PM
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I hope I didn't just call you a dipstick.
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post #9 of 13 (permalink) Old 04-10-2012, 03:04 AM Thread Starter
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Haha no.
And where is that access plug to fill it up?

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post #10 of 13 (permalink) Old 04-10-2012, 04:30 AM
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Haha no.
And where is that access plug to fill it up?

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Between the rear wheels. Metal box with two plugs. You will need a 1/2 inch drive wrench to remove the plugs.
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post #11 of 13 (permalink) Old 04-10-2012, 06:07 AM
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It should be noted this is an image for the previous generation Forrester, but yours should be similar if not exactly the same.

As for the spark plugs, it's been suggested to me that I not use iradium plugs in my N/A motor as it's a different ignition system from what's used in the XT's, but rather to stick with platinums of coppers.

Nothing changes if nothing changes

Last edited by JohnnyW; 04-10-2012 at 06:13 AM.
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post #12 of 13 (permalink) Old 04-10-2012, 06:15 AM
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As for the spark plugs, it's been suggested to me that I not use iradium plugs in my N/A motor as it's a different ignition system from what's used in the XT's, but rather to stick with platinums of coppers.
+1

I've heard that iridiums are great and that they aren't. For the record, I have good old copper and don't mind changing them at 30k even though they can really go 60k, never hurts to hear what they have to say for themselves.
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post #13 of 13 (permalink) Old 04-10-2012, 06:19 AM
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Thanks for posting the illustration. I must admit I'm still trying to figure that out on the iPad.

But I did finally figure out what a troll is and what iirc stands for. :-)
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