I am changing my gearbox oil on MY96WRX.
Can someone confirm for me if the drain plug is the bolt on the very underside of the gearbox.
Also how much oil does the box take.
Lastly does the oil have to be filled through the dipstick hole?

 

Go to search forums, type gearbox filling, search, thread about diy gearbox oil change, should be just what you wanted.

 

I had tried a search,didnt come up with much.
Tried your suggested search words.
Top man,everything i needed to know.
Thanks very much.

 

It takes 3.5 litres of synthetic 75w-90.

Cheers
Simon

 

You do fill using the dipstick hole. Can't help with your other questions

 

The drain plug is the bottom one as you say, and yes, you re-fill through the dipstick hole and as Oilman says it takes 3.5 ltrs. I would beware of full synthetic in the Subaru box - it may reduce the synchro performance (personal experience and others!) May be safer to stick to semi-synthetic GL5 75/90 (eg Castrol Driveline AKA Syntrax)
JohnD

 

Hmmm, I noticed after changing to Silkolene Syn 5 that the gearbox does feel a little notchy. I may try the semi-synth next.

 

i used 75/90 driveline syntrax and it made a whole world of a difference whatever oil they used in the subaru dealership it was rubbish i changed to castrol syntrax and it has never crunched again

 

Thanks for all the replys
I have now changed the oil,used castrol syntrax.
Used nearly 4 litres to get the level a couple of mm above full.
I hope i havnt put to much in.
Unfortunatly it still feels notchy going into 2nd.

 

gearbox volume is actually 3.8litres I believe, but recommend filling with 4litres (sligghtly above max on the dipstick) so that third gear is coated with oil better.