4L80E TCC release at idle

Anyone know how to patch OS (LS1B) to stop 4L80E TCC release at idle?

Which OS do you have...? There is a cax for 12212156 but I can't find it, let me look further.

Thanks Joe,
Got some help on this from nonnieselman.
My OS is 12212156.
I've seen cax files in the file structure, what are they?