Front/Rear Differential - Set Description · Specs. · Photos (2) · Download (1) ·   Download XRAY XB8 Diff Supplementary Sheet Download the XRAY XB8 supplementary sheet how to fill-in oil into diff. VERY IMPORTANT: You have to follow these instructions. XRAY XB8 Diff Supplementary Sheet (pdf) - English Size: 142 (kb)