Engine/Transmission (1998.5 - 2002) 40mph vibration...

[BennyHL]

Haha, I have a 40 mph vibration on my '00 too. Weird.

 

[BadDNA]

Can any of you describe the vibration you've got? Mine is a very low frequency, pretty high amplitude vibration, it seems to hit right at 40mph and is gone by the time I get to 42. It almost feels like driving over a washboard. I seem to feel it more in the back of the truck than the front but can't really explain it any better than that.