hello everyone, maybe you experienced guys could help me out. im going to be up-grading my diff. fluids and was wondering what grade(i think thats the proper term) oil i should get for the rear, center, front(is that the right order for explaining what grade oil to use). im really into my 8ight buggy. ill be bashing, and racing w/friends if that matters. some info would really help cause ive never changed my diff. fluids before thanx, clay unruh