Chassis vibration?

Hi all-

I'm a noob with a 2010 Prerunner DC SR5. I am liking the truck so far overall but it has had a few issues. I got the transmission TSB done and that worked miracles. I had a vibration that started about 50mph, which was a tire out of balance, and that has been fixed. However, it still seems like the truck has a case of "the jimmy legs." It is hard to describe but it feels like small bumps resonate throughout the truck, like an undamped spring. I am not sure if it is the tires, (Dunlop AT20) shocks, or the frame itself? Anybody else notice this? With all the frost heaves here in Ohio, it is starting to set me crazy. Compared to my two previous S-10's, the Tacoma is a bit of a wobbler. This is something I need to fix, not "get used to." Bilsteins? Different tires? I need to get the rear spring TSB done but I don't think that will help this issue. TIA for any advice.

 

I here ya. I feel the same thing with my 08, however I have a lift kit and offset wheels. I'm still working on a solution because there does seem to be a tendency for impacts to resonate throughout the front end. Have you changed anything yet?

 

One other thing. My friend has a 1990 yota that we beat pretty hard in ocotillo. I've never heard or felt the same thing in his truck. The only remedy I have found so far is to air out the tires some which obviously you can't drive your truck forever at 20psi without murdering the tires so I'm interested to see what people have to say. Subscribed!