Rear lock-up
#1
#2
Yep, that was figured out a long time ago. It's mositure that collects in the drum on the shoes. When you brake that first time or two it creates fiction and enough heat to dry it out. There's not much you can do for it other than hit your brakes once or twice before you really get going.
#3
#4
I don't know why the F150. I know if you search the board you will find more than one thread about this very issue. It's gotta be something with the design of the drum and backingplate.
I know dads 94 doesn't do it and no other vehicle I've drove has did it either.
The ABS sensor for the rear on the 97 sits on top of the rear diff as the rear is only a 1 channel ABS setup. I can't see how it would affect this problem. I guess if it thinks thinks the rear wheels are locking up to fast it activates the ABS portion of the braking system and that would explain the lock/unlock feeling you get. This is just a wild guess.
I know dads 94 doesn't do it and no other vehicle I've drove has did it either.
The ABS sensor for the rear on the 97 sits on top of the rear diff as the rear is only a 1 channel ABS setup. I can't see how it would affect this problem. I guess if it thinks thinks the rear wheels are locking up to fast it activates the ABS portion of the braking system and that would explain the lock/unlock feeling you get. This is just a wild guess.