QUOTE(r_towle @ Apr 5 2009, 08:49 AM)
Rear brake lines are laying against the frame in an exposed area...and yes they rust out and they are cheap to replace...if you are towing, you want rear brakes.
Rear brake proportioning valve is bolted to the rear axle and it has a lever that touches the bottom of the bed. The purpose is to add more rear brakes as the load increases. Its crude, but it works.
The problem is that its totally exposed, gets rusty, and once again....you loose rear brakes.
The rear spring perches, where the back shackle bolts to the frame is a bad design. Its shaped like a cup that holds water, salt, rust etc.
Get up in there with a hammer and make sure both of them are really solid.
They use solid rivets to attach to the frame. The part costs about $30.00 and then you use three grade 8 bolts to attach the new one to the frame.
Simple to remove the old one, use a die grinder and cut off the three rivets...
Rich
Rich's advice is spot on. We've had to do all of those things on our F150.
One additional suggestion though, check the front spring perches while you are looking at everything else. They tend to rust too. We replaced those on our F150 last fall after one broke; it turned out that the other one was almost rusted through and ready to break too. These are maybe $80 parts and not a big deal to replace either. Like in the rear its as simple as cutting rivets and bolting the new pieces on.
If you find that any of the perches are rusty, replace its companion. The second usually isn't too far away from breaking either.
Other than that, Fords of that vintage are great trucks! They really do go forever.