Hi,

I found this in an archive for some Toyota forums. Seems like other trucks have had this problem, and they found a way to fix it (at least in some cases).

Maybe people around here could benefit from other's experiences. This is not a pro/against any brand, so if you want brand flaming, take your trolling elsewhere please.

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Subject: 4.16 - Misaligned drive shaft (All)

Some Tundra owners have complained about a misaligned drive shaft causing a
mild body vibration. There is an easy fix for this, taken from the pages of
Tundrasolutions.com. (Thanks to DJ and Hunter Engineering Company for posting
this fix on Tundrasolutions.com !)

"Crawl under the vehicle with a long piece of string and some duct tape (the
handyman's secret weapon). Tape one end of the string to the bottom center of
the flange at the forward end of the front section of the drive shaft. This is
just at the back end of the transmission. Now stretch the string under and
along the drive shaft and tape the other end to the bottom center of the flange
at the rear end of the rear section of the drive shaft. This is at the front
end of the rear axle. The drive shaft should lie directly above this stretched
string.

Now look at the center carrier bearing. If it is offset to the left or right,
even as little as 1/8 inch, it is in the wrong place. Loosen the two mounting
bolts and center it over the string, making sure it is perpendicular to the
string. Tighten the bolts to 30 ft-lbs, as the service manual recommends."
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Anyway, hope this helps somebody out there.