just seen this, sorry I have been sorting new cars and things out after my problems with my diff yes mine is a uk I think I hav a port under steering wheel but I don't hav the car here will look next time I go and sort car out.
went to a network q rally in the 90's and parked car on the road side in a forest and when I came back the car was in a river LOL think about 20 of us ended with wet feet. worth it to warch colin and rich go though... :D
you will need to do a code test there are hundreds of things that could show. just looked it up and it goes from brakes to exhaust system sensor. sensors are a pain in the !Removed!. good luck.
The ratio was wrong on the rear diff. so the front diff has gone now. will drive it till it goes completely and will be buying a cheap run around till I build fund up then may buy new forester or gear box and diff for this one. :( :(.
I was going to say the hubs were a good price I paid £80 just for bearing then had to pay £60 for the press to get the thing out and went through a hub just getting the bearing out. one stud shot through the abs ring that's how I know hubs are easier to change.
the only other thing you could do to make life easy is run a live from battery and put a fuse on the wire like a amp one run through bulkhead into foot well. then just use the ground wire from light.