constant growl/hum in front?

[cottonlc]

i have a friend that has a 95 astro with all wheel drive. he is getting a sound that he thinks is coming from the front end. he said it seems to start once you get up past 8 or 10 mph. then it seems to change with vehicle speed. has anyone else had this problem or have helpful info. thanks, luke.

[gmsmallblockguy]

They are known for worn idler arms which can cause excessive tire noise also a sticking hub can cause noise being out of alignment and low on powersterring fluid or with a worn powersterring pump can make exsissive noise.
Hard to diagnose a noise without hearring it though.