Rear diff oil grade?
I'm after a bit of advise as I'm going to be changing my gear box and rear diff oil on my 04 sti the oil listed for the rear diff is 75w90 but I thought it being an lsd it would use lsd oil? I've looked on forums ect and some say it's fine but few people say causes diff to make odd noises and should use 90LS
If any one could clear this up for me it would be great thanks
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