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View Full Version : DIY on Auto Front Differentials (Fluid Change)


Matty2Hotty
05-12-2010, 04:33 PM
Searched but can't find anything on doing the "Correct" Front Diff Fluid Change on a Auto. I did the rear easy as cake but the front concerns me a little. Anyone have the .PDF page of steps or any DIY for the Autos?
green97gt
05-12-2010, 05:17 PM
1. drain

2. replace drain plug

3. refill with correct amount of diff oil, same as you used for rear.

:lol:

seems like subaru did use a few different drain plugs. ive had both a hex head, and a big torx.

try downloading the FSM for your car?
green97gt
05-12-2010, 05:23 PM
http://www.subaruoutback.org/forums/74- ... hange.html (http://www.subaruoutback.org/forums/74-outback-4-cylinder/6803-2006-2-5i-differential-fluid-change.html) here, that should help.

theres a link to a pdf on diffs about halfway down the page.

just out of curiosity, whats making you iffy about doin the front diff? ive always liked doing them rather than the real, cause you can use a funnel and just dump it in the dipstick hole( i usually let the bottles sit in the sun so theyre warm), as opposed to using those stupid pump things.
Matty2Hotty
05-12-2010, 06:12 PM
I guess the whole fluid level is what am concerned on... Like the rear, pop the upper and lower... plug the lower and fill till you pour out of the top plug hole. The front level check is done how... Car running and warmed up? Cold and not running? I dont think it would be like tranny fluid level check but i could be wrong.
green97gt
05-12-2010, 07:14 PM
just add 1.5 quarts, or whatever that pdf said was spec. check on the stick, make sure its at least right above the L mark or more on the dipstick.

diffs are not pressurized, there is a vent on top of the trans, so if you do add a little much it wont blow it out your seals or anything, but it will sling it up into your dipstick hole and you will get some seepage from your stick.(wonder how i know that..haha)

and the diff fluid is slung around by the ring gear, so you dont have to worry about windage like in an oil pan.

just make sure its between the marks when cold, if you find you get some seepage, suck some out with a vacuum pump or something.

EDIT: check it not running