Sub...my 2005 just started to have a mild vibration between 25-50 mph. I initially thought it was the tires and rotated them. I then greased my drive axel, but still no luck. Acceleration/deceleration makes no difference nor does putting it in 4WD. For those mechanically incline, I saw on another post that the rear drive shaft was removed and the vehicle placed into 4WD to isolate the issue. I suppose the vibration would go away if the rear drive shaft was the issue? I may have my tires rebalanced and the truck aligned as a cheap try and see approach, but will likely not follow through on the TSB given the hit/miss results. I actually just started to notice the vibration here since the last oil change so I do wonder if something else is the culprit such as a ball/CV joint. Anyhow, I hope it's worked out soon either way for me and others. It's good to see at least some effort is being made whether by Toyota or individuals.