Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
I find this to be particularly interesting. I might have missed it, but I didn't see a description of how the vibration behaves or where you're feeling it. It would also be interesting to see what would happen if you had about 300# of something you could put at the tail of the bed. When the vibration gets worse again, it would be a good time to check the torque on the lug nuts, too. But getting back to the "worse again" part of it, a small error in toe-in can do that, hence the weight in the tail of the bed. It might be the case that the truck needs just a little more toe-in, regardless of what instruments say.
I had the truck aligned a few months ago. The old tires had a small vibration and they said it was due to cupping which made sense because they were a 305 tire on a 9" wheel. They were also old and starting to crack. Thats why i bought new tires and at first i know the vibration was worse than before now they have it alot better but not good enough. Even the shop manager agrees there is a vibration but he thinks its the truck not the tires.
