One problem related to oil pump has been reported for the 1999 Dodge Ram 1500. The most recently reported issues are listed below.
Am on third engine each time oil pump failed,and now this one is acting up, powertrain end of year built truck has a lot of 2000 parts on it, rear end seized up drive shaft broke rear yoak split in two, suspension tie rods and idle arms always breaking, two break disks 1 left side 1 right side broke, left one split right down the middle, the right side the center of the hub broke right out at the bearings riped right out.