One problem related to brake disc pads has been reported for the 1997 Ford E-350. The most recently reported issues are listed below.
After driving vehicle for a long period of time or pulling a load the brakes become warm and the braking power decreases. The vehicle also virbrates when applying the brakes. Vehicle serviced 8 or 9 times for brake problems. Problem still exists. Front brake rotor warp due to heat which lessons the contact of the pads causing poor braking and vibration.