One problem related to power assist brake has been reported for the 1998 Plymouth Grand Voyager. The most recently reported issues are listed below.
While driving in 4 inches or more of water the power steering intermittently fails. The belt can be heard slipping and then re-engages. The local dealership tightened the belt once but after the most recent incident they state nothing else can be done except for the dirver to "go slower". Also, rear brakes do the same.