E4LUTION was 85/140 listed for your rear diff oil? i look at the listing for mine and i am pritty sure it was 80/90 unless its different for evo's.

Stace told me to stay away from the redline shockproof in my MY00 as its not good for syncro's. However it was good in my old 95 wrx. I think i may try some motul gearbox oil since i can't use redline.