helo
haven't had my Subaru long but I no my gearbox and diff are both due for a oil change. any advice on

How often should the oil be changed on both ?
Witch oil to get for the gearbox and differential and how much will I need?
How do I no when the diff is full do I fill till it spills ?
and is it as easy as a oil change, meaning is it just drain the oil then top back no bleeding involved etc.. ?

its a 93wrx running around 340bhp If that effects the oil I need..

thanks for any help.

 

I use castrol Universal 75w-90 in both diff and gearbox in my classic UK. Just fill diff until it runs out filler hole. Gearbox has dipstick

 

thanks .. isit easy to re-fill the diff? . I do all my work onit outside my house on the floor using a jak and bricks lol

 

Diff is easy to do on the floor mate

 

In the rear diff there are two drain plugs. You need to remove both to drain oil (I think that you use 1/2" drive from a socket set from my recollection). You're meant to replace the crush washers each time (they're a bit like sump drain plug washers but I don't think that they're the same size). To refill, you replace lower plug and then fill until oil reaches level of upper plug (one is higher than other). I think that it only takes about half a litre or so.

 

thanks for the help

 

The diff drain screws can be extremely stubborn so you might have to get creative to loosen them.

 

Thanks that's perfect

 

That seems like a Subaru thing lol, I changed my fuel pump yday it took me 30min just to get the 3 hoses off.

 

oilman on here is the guy to speak to , he will recomend the right oil for your car , he is also doing around a 20% discount from today i think ,

3.5litre for gearbox 0.8 for diff btw

 

thanks Il do that now

 

It's good to remove filling nut/plug first (just to make sure you can refill)

 

Hi

You need a 75w-90 for the gearbox and diff.

http://www.opieoils.co.uk/c-673-75w-...ion-fluid.aspx

If you want to go for the best, the Millers CRX 75w-90 NT, Gulf Competition, Motul Gear 300, Red Line 75w-90NS and Millers TRX are ideal for the gearbox. The Castrol Universal/Universal Plus, Motul Motylgear and Fuchs Gear Syn are all decent alternatives. The Fuchs Syn 5, Millers CRX, Redline 75w-90 GL5, Motul Gear 300 and Gulf Competition are ideal for the diff. The Fuchs Sintopoid, Castrol Syntrax Longlife, Millers TRX, Motul Motylgear, Mobil SHC and Amsoil FGR are also good choices.

Cheers

Tim

 

^^^This is always good practice and advise

 

thanks for all the help lads . I will also check on opieoils today thanks oilman

 

does anyone no how often I should change my gearbox and diff oil?

 

Couple of years.
Or 30k miles.

 

30,000miles thanks

 

Witch one shall I got for >>
http://www.opieoils.co.uk/p-74217-mi...ssion-oil.aspx

or

http://www.opieoils.co.uk/p-60230-mi...ssion-oil.aspx

or

http://www.opieoils.co.uk/p-77373-ca...-diff-oil.aspx

and will 5L be ok ?

 

5 litres is enough for box and diff. Ive always overfilled the box to protect 3rd. it takes 4 litres.
this is semi syth but it IS the stuff you want. the Subaru boxes love it. trust me.
http://www.opieoils.co.uk/p-744-cast...universal.aspx

 

this is how I fill the diff. tip the oil into a freezer bag. cable tie a short piece of hose pipe into the opening. squeeze it into the diff easy peasy.

 

That's a good tip it dint even cross my mind.
il look into the oil the millers looks like some good stuff tho

 

only reason I say is cos the synchros are what you need to worry about, not the brand of the oil. the Castrol oil I quoted has a very good track record on this site.

 

hummmmm I see thanks for the advice mate helps loads

 

Can u get this anywhere e.g carparts shop, ASDA lol ?

 

B and Q sells this surprisingly. There's a motoring section beside the hand tools section. I'm sure that I've got it there before.

 

Thanks for the help il chek it 2mz

 

halfords

 

I try not to go there. I got some oil from there 4L castrole edge £53 + 1L can't remember the price. then after I did my oil change I seen the oil in asda 4L £36 + 1L £9,99, and the staff in Halford dnt no carp about cars. I would always advice not to go there unless you have no choice. Thanks for the reply tho

 

B and Q definitely sell it. Just bought some today. £11.98 per litre.