93 f-150 XLT 5.0 E4OD 4x4 3.55 limited slip gears. when i go out on the highway then when i start braking the back of my truck feels like its hopping. it doesnt do this at lower speeds in town though. you cant feel any noticeable pulsating in the brake pedal. i took it to school. pulled off my drums. started to cut them, and found out there are severe low spots. i cut them 8 or 9 times. then decided to throw on new drums so i did. brake shoes look brand new. still hops. why?? thanks in advance guys!

 

Does it feel like the ABS is going apesh!t?

 

it feels like the back of the truck is gonna hop off the ground. should i maybe try un plugging the abs fuse and see if it still does it?

 

you could give that a shot. hopefully that doesnt just cut your whole rear braking...

 

ok if you have rear anti lock brakes only it could be the abs comp is screwy , pull the fuse youre still going to have brakes just not antilock.. doesnt that year model truck have the sensor on brake master cylinder.. check that too

 

pulled the fuse. no change

 

The ABS sensor is for the speedometer too. Is that working correctly?

 

well i pulled the fuse in the cab that said anti lock brakes, then my abs light went on. but i tried it out on the highway. at first it didnt feel as bad. then coming home it felt just as bad. so i figured i'd put the fuse back in. any other ideas?

 

I don't have any other ideas, unless someone thinks the limited slip could be causing it.

 

k there is a little bit of pulsating in the brake pedal.