Newb Question: Diff Oil Viscocity

[bagwaa]

Seen so much conflicting information on this one, as a newbie I am still unsure.

if I am running 5k diff oil in a 2WD buggy, and I switch it to 10k what effects will it have?

I have read that it will give me more on power steering, and less rear grip, but then I have also read that thicker oil will give me less steering?

rich