sir_Xenon: didn't show the the most difficult part for us older car owners: cracking
the drain plugs (top one first!) can be VERY difficult as they are on
tight. I used a floor jack to push up on the long 1/2 rachet as one end
was on the plug, this way I could dislodge the stubborn plug from the
differential. Don't use an impact wrench as that can damage your threads.
I put my left foot on the ratchet to make sure it stayed in there and used
my hand to pump the jack. MAKE SURE YOUR CAR IS NOT on JACKS OR STANDS
WHEN DOING THIS as this could make car unstable from the movement and make
it fall off the supports. This is dangerous. See if you can get all the
work done with the car flat on the ground. I
The second part is putting the oil in the top.. squeez bottle should work
but you can use a cheapo pump to pump it up in there
The last point is plugs: clean the threads and decide if you are the
believe of thread sealant (such as PTFE tape or Teflon tape (yellow)) or
other means. There is differing theories out there. its a conical type
pipe fitting and Subaru does call for something. 33.2 ft. lbs for the
plugs (Torque). thanks for the video though
PS let it drain over night and make sure the car is flat when filling it
TunesByTanzil: Wow easy! easier than oil, less mess too haha, thanks for the vote of
confidence, might do it soon!
Ethan Newman: @5bbx93 all subaru transmissions have the dif in them.
packrat76: You think 70 bucks is reasonable? Seems high, but they want 170 for the
front and rear on my wife's 08 Impreza at the dealer so that's even worse.
I told her I'd be happy to do it for free, just buy the gear oil. Now if I
can figure out what type I should use. I noticed you had a bottle of
80W-90. Is 75W-90 synthetic OK?
stussy: How many qt
Big Si: can anyone tell me if its the same principle on a 2002 bugeye manual?
dankebuddha: @5bbx93 ur dealer ships charges too much shop i worked in charges 35 bucks
for stander gear oil or some cars like fords use ATF if you cars requires
synthetic oil it goes to 50 and most cars dont have a drain pug on the diff
you need a diff pump to suck out the old gear oil
Stacy Marchand: my light came on changed the gear oil now it flickers on & off &when the
brakes are used it goes out any way to disable it
Boa Lee: How do you check the fluid level on the rear differential to see if you
meet specifications? Is there a dipstick or do you stick your finger in the
hole like what this one other guy did on his youtube video?
t9exp: the manual trans and front diff use the same oil, 75-90 or 80-90, mobil1,
pennzoil , royal purple, bg or amsoil is fine to use. no special additives
needed. the automatics use two different oils. the gear oil and the atf.
the older subarus use just regular atf the newer autos use subaru hp atf.i
think 04 and newer use hp fluid. the front diffs use either a 21mm socket
or a T70 bit to drain, very easy service to do
Viet Wong: I'm not quite sure. I would assume that they're different. Subaru's all use
differentials made by Nissan. Subaru uses 2 types of differentials, the
R160 and R180
7suprasonic: Hey thanks for this vid. Do you know how much you are supposed to torque it
down? Also for the transmission that uses the torx bit, do you know the
torque spec on that as well? I've looked everywhere, would really
wpgspecb: Anyone else think that the thumbnail looked like a skull ?
geogan2: I could be wrong but I don't think you should use any old gear oil in the
rear diff - supposed to be special LSD oil otherwise it won't work right in
all situations - i use Motul 90 PA. Also from video looks like you only
jacked up back of car - needs to be flat to get refill level right.
Dave Yttri: This should be a 20 sec video. Take out drain plug, take out fill plug. Let
it drain 'forever' to get it all out. ( I even put dran plug back in & add
some cheaper clean gear lube & re-drain to try an get as much of the old
stuff out )Put drain plug back in & fill up to fill hole. And spend the
extra $ on the good stuff. I've found Amsoil to be the best. You'll be glad
u did, esp. in rear differential.
packrat76: @5bbx93 OK, sounds good. Can you click reply on the specific comment if you
reply to a comment, then the person will get an email notification. I just
happened to check back on the video before and saw you replied in the
comment section. I called the dealer and they told me 80W-90 for the rear&
75W-90 for the front. He told me they used Castrol synthetic at the dealer
but any decent gear oil would be satisfactory. He didn't mention any
limited slip additives.
Viet Wong: You attach a small hose to the tip of the fluid bottle. You then place the
tip of the hose into the fill hole and tilt the bottle down so that the
fluid flows through the house into the differential. You can also transfer
the fluid to a smaller container, which in turn can be used to fill the
differential without the use of a small hose. I didn't add the oil because
I didn't have a camera person. I didn't want to get oil all over my camera.
Viet Wong: $70 is an OK price. My dealer actually quoted me $60 to have it done. It
feels so much better to do it on your own. All you need is the gear oil
which will run you $10 at the most. You can use what the manual says or
80w-90. The oil doesn't matter since the differential is so basic, but
don't put something like vegetable oil in it. There have been a few
postings on Subaru forums that talked about the Wal-Mart gear oil being
great and only $3-4 bucks.
stoCKtonRidaz: hey, bro do you know if lancer evolution is the same procedure by any
Tithis: Most annoying thing about this when I did it was trying to get oil back in,
they don't give you a lot of room to maneuver an oil bottle on some of
them. I now own a hand pump specifically to do fluid changes in awkward
places. Mine was also pretty rusted up, but using a car jack to forcefully
loosen the bolt works really well.
packrat76: Don't know why I have a bunch of duplicate postings.Anyways, I came back on
here with some info for anyone with an automatic that has a front
differential. It doesn't have the 1/2 inch square recessed plug.The plug
(2003 & up) has a T-70 torx and I got the torx socket at AutoZone.You
refill the front differential through the front differential dipstick
tube.A piece of 3/8" clear vinyl tubing about 20 inches long attached to
the end of a funnel will make it easier to refill. Use 75W-90 oil.
dankebuddha: @stoCKtonRidaz it's the same on any car with a diff like this just find out
what fluid you need and if you dont have a diff drain plug your gonna need
to take it to a local shop that has a diff pump to suck out the old fluid
most shops only charge 35 bucks or so for a diff service
packrat76: @rkellyforums It's a plug that has a 1/2 inch recessed square. You either
insert a half inch ratchet or an extension attached to the ratchet or
breaker bar into the recessed square and you should be good to go. It
shouldn't be that hard to break loose, and DON'T over-torque when you
reinstall them! I read (don't know this for sure yet) the differential case
is aluminum, so excessive torque on the plug is a bad idea.
writeleahnoel: how often are you supposed to change rear differential fluid? mine just
went out so i'm frantically trying to find a used one (new is $700) and i'm
wondering if it's from me never changing it, or checking it, or even
knowing anything about it-great tutorial! thanks
R Log: Thank you for the write-up!!!
DOLRED: The fun part of this job is adding the oil and putting up with the smell of
lube oil--which has a very obnoxious odor. Appears Subaru makes the drain a
piece of cake with the plug. The old 2 cars I have done in the past--have
covers that must be removed. On those 2 vehicles I also swabbed out the
bottom as the crud settles on the bottom and won't drain due to its
consistency. I'm sure dealership mechanics wouldn't waste their time with
that extra work.
Stacy Marchand: helllloooooooooo see previous post
lbori1: @subiefan no bro the same thing just make sure you're in a flat even
surface and put your car up on jacks and your good to go, very simple very
murphynapoleon: A good video, differentials are often neglected, but please note this: All
Subarus (AWD) have two differentials, front and rear. On a manual
transaxle, the front differential shares 80w/90 gear oil with the trans.
and a fluid change covers both. On an automatic, the front diff. is in a
separate chamber of the trans. housing and DOES NOT share fluid. There are
2 drain plugs and 2 dipsticks, one for Dexron fluid and the other for
80w/90 gear oil. Be sure to get this right or disaster will result.
TheSubieFan: do I do anything different for my sedan 2.5i 09?
Viet Wong: I was told that I don't have a front differential since my car is a manual
transmission. The manual transmissions would be the differential I guess.
My manual says 75w-90 gear oil. I would buy the ATF from the dealership
just to be safe. I have heard horror stories about people putting random
fluids into Honda automatics.
BQQB-TUBEALBLE: Kudos Kid!!! I just want to add if your car is not as new as his I would
try to remove the filler plug first. If it gets stuck or strips and you
drain your fluid then good luck filling the diff.
packrat76: @5bbx93 I couldn't find anything specific on what to use as far as type of
gear oil, just that it uses gear oil, which I figured. I'll probably go
with a Valvoline or Mobiloil synthetic. Did you also change your front
differential oil? It holds a little more than a quart from what I've read
online. Is your car an automatic? If so, any clues on it? I've read that
you should buy the ATF from the dealer and not use anything else. Btw,
thanks for posting the video on this.
xake19: Thank you for the post. U understand how difficult it was to manage a
camera with one hand and the other hand to do the work being documented. My
question is this: How would you know that enough oil was placed? Do you
fill it until the excess comes off? or you just fill it according to amount
mentioned in the specs?