ATX temperature overheating?

[yaryarbing]

New to this forum and looking for information.

I have enjoyed this forum over the past several weeks and have gained an incredible level of knowledge regarding my recently purchased 2007 Yaris sedan. Thanks to all of you for this great source of information.

I recently blocked the lower grille for FE purposes. I have been watching the water temps closely using my Scangauge with a maximum temp thus far at 202 degrees F. Well below overheating...

My question is in regard to the threat of an overheated ATX due to the blocking of the lower grille. Is there a threat of overheating the ATX with the lower grille blocked? I have been unable to locate the TFT code (transmission fluid temperature) on my Scangauge to watch this temp. Any Scangauge users out there who have been able to program the Xgauge to show TFT? If it were available, what would be considered an excessive temperature?

Thanks for any info that can be provided.