Donny, I have a mild vibration in my drivetrain when I
let off the pedal. As speed decreases through the 68-70
mph range it mildly vibrates the stick. No vibes at all
under power 0-117 mph. Jon H. a fellow DML'er has had
similar symptoms w/ catastrophic rearend failure. Might
CHECK the old 9.25 rear for cracks, that was one sign
he said he missed. Don't panic though. (I did!)
JON H. you out there?
GS
> 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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