Check what speed ur tires are rated for, this may just be me but with the price of fuel I never take my truck above 110km unless I'm passing someone, big trucks aren't ment to go fast, if u wanna go fast buy a sports car..... Lol

 

Lol! True, but when time is money I try to pick up the pace. Oh by the way, just had my left side universal joint replaced. From what my mechanic told me they should have a grease fitting but the dodges don't have them. Therfore it wore out after 50k miles. I should expect the right side to start grinding any day now.

 

Funny, but the vibration doesn't start till 105km/hr and doesn't stop till you hit a buck twenty. So speeds above 120 are smooth as silk, must be a hybrid dually sports car...

 

mine is really smooth up to 190km and really easy to steer to ..LMAO i will let ya know what it does after that after i replace the clutch...

 

My uncle had the same problem and it ended up being his drive shaft was bent

 

good luck with WARRENTY issues. Hope the 6.7 stays together for you w/all the problems Chrystler is having w/that motor.

 

Just an update to my original post, I finally got rid of the vibration. The dealership balanced my rear tires 'WHILE ON THE TRUCK" I think this was key. I had the tires rebalanced several times by tire shops and had no luck but they did them on a conventional balancer.

 

I am running a 07 dually ,i asked my mechanic about vibration ,his response if the truck has a two part driveshaft then the steady bearing may be an issue. I am new to the rams so i do not know if they came with the swo part driveshaft. also u joints could cause it.