Long time lurker, first time poster!
I posted this over at TN, but didn't get much help, so I'll try here.
I bought a 2006 Tacoma DCAB 4x2 Prerunner SR5 Off Road 5spd AT back in January. I noticed a severe vibration would occur during acceleration right at about 35-40 mph. Now, I read all about the dreaded "vibe" that plagues most Tacomas, but it seems like most of the time it occurs on 4x4's that have been lifted. Mine is neither of those. I've taken it to the dealer twice. The first time they "couldn't re-create the condition", but they lubed the drive-shaft. The vibe returned right when I pulled off the lot. The second time I took it in, they felt the vibe, checked the differential and the drive-shaft, but concluded that my tires were the culprit, even though there's still plenty of tread left on them. Their tire theory doesn't make sense to me, because when I drop the transmission down into 4th, the condition does not occur. Any suggestions??