Originally Posted by
scoobyrs25
All cars use different designs for the diffs. Tooth count, clearances and volume all change what oil is required. It's just like shock pistons. The Xray takes heavier oils.
exactly, the car tends to be on the heavy side, depending how you set it up. so that inertia calls for thicker oils. I run like 400-600cst rear and 600-800cst front shock oil depending on the surface. that comes out to like 50wt-70wt, usually most cars run more like 30-50wt.