90+MPH Resonation

From: Donny M Hayes (hayesdm@scott.net)
Date: Thu Sep 17 1998 - 08:36:21 EDT

Hi All,

Just a quick question--mainly to the other RT owners, but may apply to all.
I have noticed a strange HUM (drone, vibration, ????) from my RT at high
speeds. It normally starts about 85-90 and gets fairly bad by 100+. What
could be causing this? I don't have any other strange vibrations at any
other speed or RPM level. Could it be tires? Alignment? Slightly out of
balance drive shaft? How do I explain to the dealer that my truck seems to
hum at 100 mph?

Thanks,
Donny M Hayes
98 5.9 RT CC Amethyst

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