when it rains, or its real humid out side, the brakes on my truck are super sensitive, as in a can lock the rears up on gravel
it only happens when i first start driving, after getting up to about 30 or so, when i step on them they start out kinda sensitive, then even out and act normal for the rest of the trip

any ideas why, flash rust forming on the rear drums,
its starting to tick me off, i hate the launching effect it has on a drink in my cupholder

 

lol I have the same issue too, I think it just has to do with water on the rotors.

 

the cool thing about it tho, i can make chicks **** dance when the brakes act up when im leaving school

 

LOL that was good. It does make things a little interesting when you get on your brakes and they grab hard like that.

 

especially on snow

 

BOTH of my trucks do this! It doesnt really matter what its like outside or how long its been since i've driven it last. although the cold seems to make it more apparent. right when i pull away i gently press the brakes and immediately the front locks up and slides. after a 1/2 a mile its fixed. and brakes fine until i park it. the only thing i can figure is a seized caliper pin or a bad booster (leak possibly)