Mar 5, 2009 #1 F FirstL Member Joined Jun 3, 2008 Messages 108 Reaction score 0 Points 16 I have a 1995 chevy z71 when you put it into 4 wheel drive it makes a loud grinding noise.
Mar 5, 2009 #2 D DavidL Member Joined May 18, 2008 Messages 298 Reaction score 0 Points 16 I think the truck has to be stopped when you engage the 4wd.
Mar 5, 2009 #3 D denniss New member Joined Jun 15, 2008 Messages 19 Reaction score 0 Points 1 My coffee grinder does that also. Try smaller nuts.
Mar 5, 2009 #4 V Val Member Joined May 14, 2008 Messages 151 Reaction score 0 Points 16 It may just need some transfer case grease.