Conventional Parking Brake problems of the 1999 Ford F-350

I purchased a 1999 F-350 super duty dually. From records from the pervious owners problems and the problems I have had with this truck, I can not belive service problems I have had. A couple of months ago the parking brake blew when I was on almost level ground and need least to say the truck rolled and crashed, lucky not one was hurt. But it did quit a bit of damage to the truck and my trailor. Now I know this is a problem on these Fords but not yet on my perticulare truck. Also in the last three months I have put in a new clutch witch is expected. And have had close to $ 3,000 in brake repairs????? that was not!!!drums cracking,hubs exploading witch I understand in a problem too but not on my truck yet?????? please have some one contact me I need some guidence, information, help I have had no help from Ford.

The parking brake will not hold well on an incline. This is especially noticed in reverse, as on a boat ramp with a boat that I am trying to launch. I can set the brake as hard as I can and the truck will still roll back against the parking pall in the automatic transmission. It becomes very difficult to then shift the transmission into gear. The dealer has looked at it twice and stated that they don't see a problem but they cannot duplicate the conditions.

When transmission was in park with emergency parking brake on, while loading vehicle, it rolled forward. Emergency brake did not hold vehicle, it stopped in a ditch.

The parking brake will not hold the vehicle at its gvwr on an incline.

Parking brake when applied does not work. Vehicle will roll if not in gear when parking brake is applied.

Parking brake is ineffective. When applied on an incline vehicle still rolls. Ford has been contacted.