1engineer
Moderator
My '13 has harsh shifts at low speeds, I wounder if this TSB will apply to mine, since you said it only covers the first few thousand.
Although, just because toyota is aware of an issue, doesn't mean they will fix it for newer models...they still haven't fixed the driveshaft clunk issues that they have known about since the 3rd gens....
Most of these issues were on the '10-'11 models. There is also a TSB for the driveshaft thunk for those same years. I know my '12 shifts fine and has no clunk. The big issue for the shift was a "slipping" between 1st and 2nd while going around a slow speed sharp turn, such as parking lot driving. My '11 SR5 had it and was fixed by the re-flash if I remember correctly. So was the driveshaft clunk when stopping.
EDIT: I am wrong. I did get the reflash but no joy on fixing the shudder. It was still doing fine at 66K though when I traded for the TE. No shudder now lol.