Yeah, I get a strong pull to the right when I slam on the brakes, or when hard braking. Under normal braking, no problems. I've got high steer, stock IFS box, 5.5" alcans. I am really the only one with this problem?
A friend of mine had the axle oil seal fail which pushed grease out into the brake caliper. I his case the truck pulled hard to the left. Could be the same is happening to you.