stepuptata
02-09-2005, 09:25 PM
Why does my 2004 LLY Allison 4x4 2500HD Howl and have a very light vibration at 55-60 mph in 5th gear :help: (goes away out of OD). The howling and vibration gets 10 times louder in 4 wheel high. Started @ 2000K, now has 9K, hasn't gone away. Do I need to take this in to the dealer or is that a waste of my time? Thanks for any help, Troy.