"When I replaced the 4 bolts that hold the brake drum to the axle I think I used smaller O.D. size on the shank of the bolt sooo. "
Brake drums are not held onto the front axle with bolts. I don't know what holes you used the undersize bolts in but what ever it was you can expect slop in your steering from it. This creates a very dangerous situation. What were you thinking?
