Hey guys,
Hopefully I don't get flamed for rezzing an old thread. But I have been experiencing some issues at highway speed with the truck. I just put on the ADD rack with my new tent. To compensate for the rear end sag I swapped the factory block with a 4" from Readylift. Truck sits great and is exactly what I wanted.
However, at highway speed (60mph-80mph) the rear end feels like it shakes. I have tried to do as much research here to see if other owners are experiencing this same thing. We've had a lot of warranties with the BFG KO2 at my store and I just had them rebalanced. The tire shop that did it said that one tire did have a small "hop" to it but nothing crazy. It seemed to help a little but it's annoying enough to where it sucks to drive it at those speeds. I spent 8 hours in the truck yesterday driving from one side of WA to the other and it was present the whole damn time. Again, steering wheel is tight with no wobble but you can feel it right under the seat. Some roads are better than others.
1) Is the spring swap in order now? ICON
2) Do the tires need to be changed to something else? Higher load range? We've taken off KO2s before on vehicles and swapped to like a TOYO and the vibrations disappeared.