Hi all,

2007 STi Hawk.
I feel like changing my rear diff oil, not been done in probably 3 or 4 years....or so.

Looking at my owners manual, this will be the one I need :

https://www.opieoils.co.uk/p-899-mot...smission%20Oil

However, will 1 litre be enough?

Also, would I need new washers for the drain and fill plugs?

******Edit, found in the manual that the oil capacity is 1 litre , So, drain and fill plug washers needing to be replaced when I change it?******

Many Thanks,

Matt

 

The sti needs an lsd oil for the rear diff, i have always used this.
https://www.opieoils.co.uk/p-888-mot...VariantID=1120


Yeh 1l is plenty is about 0.8-0.9 i cant fully remember.

 

Just to add, no you dont need any washers but always free the fill off first (top plug) they can be really tight if not been removed for a while.

 

Thanks Jay, yes saw that tip on Youtube. Just watched another video where the bloke does the draining first without touching the filler plug....brave man! lol


Ok, but the book states the 75/90 oil in my post, is my rear diff LSD then?

 

Not sure why the manuals say that, yeh its an lsd you can use the 75//90 but the 90pa oil is a far better oil for it.

 

This, make sure you can open the filler plug first.

 

I

Did mine recently and used something like this to refill the rear diff.

 

i changed oil and used motul gear 300ls for diff(r180 sti diff)

and for filling, i used big syringe and hose both for gearbox and diff.