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-   -   Transmission Fluid Change (yes I have used the search button) (http://legacygt.com/forums/showthread.php?t=192080)

zhabodav 08-28-2012 12:50 PM

Transmission Fluid Change (yes I have used the search button)
 
2007 Legacy GT

Got an easy question. I want to change my transmission fluid and I have read through the forums however I have not been able to find the exact answer.

I have Subaru oil in the tranny however the dealers around me are out for some reason so I want to change it to Castrol synthetic 75/90.

I don't know what the last Subaru dealer put in there either.

1) Is it a simple "unscrew with T70 Torx" flush or is there an additional reservoir with tranny oil that needs flushing too (I heard that there is on some cars and changing oils requires a full flush).
??

bluesuby 08-28-2012 12:58 PM

Never heard of a reservoir. If you want to maximize the draining of the trans, leave the plug out while you jack up the rear and change the diff fluid.

zhabodav 08-28-2012 01:02 PM

Quote:

Originally Posted by bluesuby (Post 4045879)
Never heard of a reservoir. If you want to maximize the draining of the trans, leave the plug out while you jack up the rear and change the diff fluid.


Seems like a stupid noob question but I need to be sure.
Rear diff fluid and tranny fluid aren't physically connected by one reservoir right? Just want to make sure.

ibr_adam09 08-28-2012 04:28 PM

No, they're not. and you cannot use the same fluid in both front and rear.

The rear requires fluid with a limited slip diff additive.

F1inspiredLGT 08-28-2012 05:04 PM

Tust me on this, don't use Castrol synthetic 75/90, you will get the famous 4th gear grind. I've used this before, along with several other members, and most of us started having this problem. Once I switched back to Subaru Extra-S, the problem was fixed. Gear box is smooth as butter. I bought mine off of ebay, and some of the vendors on here sells it as well.

No need for a flush, just drain and fill. Same with the rear diff.

theflystyle 08-28-2012 05:22 PM

extra s is for manuals only IIRC, for anyone else coming across this thread

F1inspiredLGT 08-28-2012 05:31 PM

That is correct, the OP has a 5MT

DerekDaniel 08-28-2012 06:34 PM

dont want to thread jack but do the Automatic Gts need lsd in their rear diff?
I have an 08 and a tuner put amsoil 75-90 in the rear diff no LSD fluid... is this bad?


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