i have a 1997 ford f150 rear wheel drive v6.

my roaters are warped but im positive it isnt whats causing the problem i have. and my sliders arnt seazed and my calipers are fine, and my break pads are sitting at about 75%. my tie rod ends are just starting to get loose. but! when i break my trucks pulls harsh to the left, or harsh to the right, or it doesnt pull at all? what can this be? i recently went from the stcok 16 inch rims with the 225/75R16s to 285/60r18s with a -6 offset. i do notice it more with the bigger tires, could it be my tie rod ends?

 

How are your shocks??? Worn out stockers with bigger heavier tires??
That makes them get squirrelly under braking.

 

maybe you need to bleed your break lines.

 

Have you changed any suspension parts on your truck?

 

Look at replacing the connecting hoses from the frame to the brakes. Sometimes the i.d. shrinks and won't release all the pressure.
good luck.