so i was given a 12 bolt with better gears than i currently have. since it's sitting in the garage i figured i'd replace the bearings and oil seals before putting it under the truck. both local parts stores just had the "rear wheel repair package bearing" (by timken) which also repositions where the rollers contact the axle. anyone used this before? the whole unit sticks out a 1/4 inch from the axle tube (which is correct according to the directions). and when i put the axle in i have to tap it with a maul the last few inches. just doesn't seem right...any input?