i also had bleeder screws that were rounded. i had to take the dremel to either side, flatten both sides and then use vise grips. what is the weight of you truck? as mentioned above you should have 3 slotted (standard) screws holding the hub on. also if you do have the 3 screws, they are not evenly spaced. it's like the gas sending unit's mounting holes (only goes on one way). line them up before re-seating the hub. -DVZ