Have an 07 FJ, 4x4, AT, purchased new so I'm the only owner. Started having the strange shudder I've seen referenced in several posts on this site and others. I had already summized it was transmission related because changing the RPM would change the shudder, and it only happens at a specific RPM. If you drive at lower speeds in 4th gear instead of drive, it doesn't happen at all. So, right now, after a ride along with a Toyota tech (they didn't feel it the first time) we've pinned it down to the TC. Right now I'm waiting to hear back if Toyota will help since there are only 80k miles on the truck, and what this is going to cost. $1500 just for the TC alone was mentioned. Booooo!!!! This is my third Toyota truck, had a 92 4x4 22re, 97 4x4 Tacoma and now the FJ. Never had a problem with any until the FJ, and this is the first problem. I am glad for that. What I would like to know are some links to reputable parts suppliers. I do know the tech didn't find any TSB's on this problem, but I've seen it referenced a lot on these types of Forums, so that's a bit strange. I've found it referenced with Tundra's as well.