the measurements are as follows, crown wheel is 38mm round, with bearings on it is 34mm from outside of bearing to outside, from outside of diff case to outside of crownwheel 23mm , diff case is 30.5 mm round, from outdrive to ouydrive is63mm to 63.5mm, bearing is 16mm round, i am awhere i need 1/8 cases but i dont have any to try if they fit. any help would be sweet.