Drive Line Vibration - Fixed

I have an bone stock '07 2WD Double Cab PreRunner V6 with 90k on it. Well, about 5k miles ago, it developed the infamous 15-30 mph shake while under power. I read at length here all the speculation why this might happen as well as the bulletin from Toyota addressing this issue. A few thousand miles ago it started getting worse and continued up through 40 mph. I torqued the leaf spring bolts (they were loose as hell) although it made no difference. So, I took it to a shop I trust and ask my guy to check it out. He put it on a lift, put it in gear and ran in up to speed while watching the drive shaft. He said he could see the vibration, so he pulled the rear shaft, had it checked and found it out of balance. He also found a bad U-joint so he replaced them all. Results.....smooth as a babies butt.

Hope this might help those with a similar problem.

 

My dealer decided to replace the whole drive shaft on my '11 as part of the TSB on the rear axle, and it made a considerable difference. The vibrations at 40-60kph are almost completely gone. Still a slight vibe under acceleration but going back in this week to get the rest of the work done.