One problem related to driveshaft has been reported for the 1998 Chevrolet Astro. The most recently reported issues are listed below.
Between 50-65mph the rear end has a loud humming sound low sound - talked to another customer who frank parra has tried to solve their problem. Brown funeral home buys a number of Astros. Problems with their 97 and 98 - same thing. Frank parra tried to cure by balancing drive shaft and putting a weight on the exhaust to no avail. Can you help. Really annoying.