首先多謝兩位師兄,用返original gear diff 加三萬度油係入完灣再出灣好似唔夠去(可能一邊碌離地所以有空轉),if using the ball diff (apply the A&W instead of ball diff grease), slip is happen on every corner, no matter how hard i tie the screw, it really disturbing, but will try bro. li5115 using Step bolt.
But reaaly thanks u 2 suggestions.