I see no mention of "downshifting to 1st(lowest gear) while running at higher speeds" that was mentioned above. Again. CDF related.Is this the bulletin you are looking for?
The "Significant" describer used earlier in this thread is where my issue lies, and the fact that things were mentioned without any documentation. Not saying that "downshifting to 1st(lowest gear) while running at higher speeds" hasn't happened to anybody, but I would love to see the TSB for it, and the problem cause/resolution.