Has anyone gone to arbitration for there 2000 mph vibration around 70-75 mph? If so did you win?
how much did you have to pay etc.

I didn't have to take it that far. After the exhaust mod it seems to be entirely gone. Yesterday I took it on the highway and went through and held all the speeds I previously had problems with and it was smooth as glass.

Truck stock- 70 mph vibration

Since then I added the H2 rims and tires. Vibe still there.

The I installed the 5" exhaust, had the speedo recalibrated from 400 to 601 revs per mile. Changed the front and rear lube to RedLine.

Vibe is gone.

I think it's a harmonic transmission that could be using the exhaust system as an "instrument".