My completed Truggy

Ok after I thought about it I pulled the center dif out , and took it apart and flipped the bearings . Is that what I should do ? It seemed to work . With the monster mount I see it has a extra piece the spacer. I have a 48 t spur gear will spacer work for that . Lmk so I can order the mount that was why I was so confused but I think flipping the bearings Did it I hope. Thanks for you quick responces