In the last while I have gone thru all my brakes front and rear,all new severe duty pads,any rotors or calipers even slightly close to max spec replaced.Put in new caliper mount sliders and seals .
Here's what the problem is,the brakes are good for a short while then of course you load up the camper or trailer and start to work the truck the brakes will start a severe pull to the left or right just depends on the day.Thought of the brake lines to the calipers-replaced them too!Also used a severe duty brake fluid.
Any info you might have,or past troubles in the same area would be appreciated.Thanx.Starting to get alittle expensive to do the brakes three times a year.

 

I'm experiencing some similar things on a 99 E350. After braking hard and heating
up the brakes the vehicle starts to pull to the right. One time the right front locked up and wouldn't let go. It got hot enough to start smoking. I've had the calipers replaced and the front brakes completely reworked. Even with this $600 rework I've had the brakes start pulling to the right when applied. Any info on what might be going on is greatly appreciated. This is supposed to be a "super duty" vehicle and a couple of hard brakings with a light-medium load shouldn't cause anything weird like this.